0 ) { $max_width = min( intval( $content_width ), $max_width ); } } elseif ( 'large' === $size ) { /* * We're inserting a large size image into the editor. If it's a really * big image we'll scale it down to fit reasonably within the editor * itself, and within the theme's content width if it's known. The user * can resize it in the editor if they wish. */ $max_width = intval( get_option( 'large_size_w' ) ); $max_height = intval( get_option( 'large_size_h' ) ); if ( intval( $content_width ) > 0 ) { $max_width = min( intval( $content_width ), $max_width ); } } elseif ( ! empty( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ), true ) ) { $max_width = intval( $_wp_additional_image_sizes[ $size ]['width'] ); $max_height = intval( $_wp_additional_image_sizes[ $size ]['height'] ); // Only in admin. Assume that theme authors know what they're doing. if ( intval( $content_width ) > 0 && 'edit' === $context ) { $max_width = min( intval( $content_width ), $max_width ); } } else { // $size === 'full' has no constraint. $max_width = $width; $max_height = $height; } /** * Filters the maximum image size dimensions for the editor. * * @since 2.5.0 * * @param int[] $max_image_size { * An array of width and height values. * * @type int $0 The maximum width in pixels. * @type int $1 The maximum height in pixels. * } * @param string|array $size Size of what the result image should be. * @param string $context The context the image is being resized for. * Possible values are 'display' (like in a theme) * or 'edit' (like inserting into an editor). */ list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size, $context ); return wp_constrain_dimensions( $width, $height, $max_width, $max_height ); } /** * Retrieve width and height attributes using given width and height values. * * Both attributes are required in the sense that both parameters must have a * value, but are optional in that if you set them to false or null, then they * will not be added to the returned string. * * You can set the value using a string, but it will only take numeric values. * If you wish to put 'px' after the numbers, then it will be stripped out of * the return. * * @since 2.5.0 * * @param int|string $width Image width in pixels. * @param int|string $height Image height in pixels. * @return string HTML attributes for width and, or height. */ function image_hwstring( $width, $height ) { $out = ''; if ( $width ) { $out .= 'width="' . intval( $width ) . '" '; } if ( $height ) { $out .= 'height="' . intval( $height ) . '" '; } return $out; } /** * Scale an image to fit a particular size (such as 'thumb' or 'medium'). * * The URL might be the original image, or it might be a resized version. This * function won't create a new resized copy, it will just return an already * resized one if it exists. * * A plugin may use the {@see 'image_downsize'} filter to hook into and offer image * resizing services for images. The hook must return an array with the same * elements that are normally returned from the function. * * @since 2.5.0 * * @param int $id Attachment ID for image. * @param string|int[] $size Optional. Image size to scale to. Accepts any valid image size name, * or an array of width and height values in pixels (in that order). * Default 'medium'. * @return array|false { * Array of image data, or boolean false if no image is available. * * @type string $0 Image source URL. * @type int $1 Image width in pixels. * @type int $2 Image height in pixels. * @type bool $3 Whether the image is a resized image. * } */ function image_downsize( $id, $size = 'medium' ) { $is_image = wp_attachment_is_image( $id ); /** * Filters whether to preempt the output of image_downsize(). * * Returning a truthy value from the filter will effectively short-circuit * down-sizing the image, returning that value instead. * * @since 2.5.0 * * @param bool|array $downsize Whether to short-circuit the image downsize. * @param int $id Attachment ID for image. * @param array|string $size Requested size of image. Image size name, or array of width * and height values (in that order). */ $out = apply_filters( 'image_downsize', false, $id, $size ); if ( $out ) { return $out; } $img_url = wp_get_attachment_url( $id ); $meta = wp_get_attachment_metadata( $id ); $width = 0; $height = 0; $is_intermediate = false; $img_url_basename = wp_basename( $img_url ); // If the file isn't an image, attempt to replace its URL with a rendered image from its meta. // Otherwise, a non-image type could be returned. if ( ! $is_image ) { if ( ! empty( $meta['sizes']['full'] ) ) { $img_url = str_replace( $img_url_basename, $meta['sizes']['full']['file'], $img_url ); $img_url_basename = $meta['sizes']['full']['file']; $width = $meta['sizes']['full']['width']; $height = $meta['sizes']['full']['height']; } else { return false; } } // Try for a new style intermediate size. $intermediate = image_get_intermediate_size( $id, $size ); if ( $intermediate ) { $img_url = str_replace( $img_url_basename, $intermediate['file'], $img_url ); $width = $intermediate['width']; $height = $intermediate['height']; $is_intermediate = true; } elseif ( 'thumbnail' === $size ) { // Fall back to the old thumbnail. $thumb_file = wp_get_attachment_thumb_file( $id ); $info = null; if ( $thumb_file ) { $info = @getimagesize( $thumb_file ); } if ( $thumb_file && $info ) { $img_url = str_replace( $img_url_basename, wp_basename( $thumb_file ), $img_url ); $width = $info[0]; $height = $info[1]; $is_intermediate = true; } } if ( ! $width && ! $height && isset( $meta['width'], $meta['height'] ) ) { // Any other type: use the real image. $width = $meta['width']; $height = $meta['height']; } if ( $img_url ) { // We have the actual image size, but might need to further constrain it if content_width is narrower. list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size ); return array( $img_url, $width, $height, $is_intermediate ); } return false; } /** * Register a new image size. * * @since 2.9.0 * * @global array $_wp_additional_image_sizes Associative array of additional image sizes. * * @param string $name Image size identifier. * @param int $width Optional. Image width in pixels. Default 0. * @param int $height Optional. Image height in pixels. Default 0. * @param bool|array $crop Optional. Image cropping behavior. If false, the image will be scaled (default), * If true, image will be cropped to the specified dimensions using center positions. * If an array, the image will be cropped using the array to specify the crop location. * Array values must be in the format: array( x_crop_position, y_crop_position ) where: * - x_crop_position accepts: 'left', 'center', or 'right'. * - y_crop_position accepts: 'top', 'center', or 'bottom'. */ function add_image_size( $name, $width = 0, $height = 0, $crop = false ) { global $_wp_additional_image_sizes; $_wp_additional_image_sizes[ $name ] = array( 'width' => absint( $width ), 'height' => absint( $height ), 'crop' => $crop, ); } /** * Check if an image size exists. * * @since 3.9.0 * * @param string $name The image size to check. * @return bool True if the image size exists, false if not. */ function has_image_size( $name ) { $sizes = wp_get_additional_image_sizes(); return isset( $sizes[ $name ] ); } /** * Remove a new image size. * * @since 3.9.0 * * @global array $_wp_additional_image_sizes * * @param string $name The image size to remove. * @return bool True if the image size was successfully removed, false on failure. */ function remove_image_size( $name ) { global $_wp_additional_image_sizes; if ( isset( $_wp_additional_image_sizes[ $name ] ) ) { unset( $_wp_additional_image_sizes[ $name ] ); return true; } return false; } /** * Registers an image size for the post thumbnail. * * @since 2.9.0 * * @see add_image_size() for details on cropping behavior. * * @param int $width Image width in pixels. * @param int $height Image height in pixels. * @param bool|array $crop Optional. Whether to crop images to specified width and height or resize. * An array can specify positioning of the crop area. Default false. */ function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) { add_image_size( 'post-thumbnail', $width, $height, $crop ); } /** * Gets an img tag for an image attachment, scaling it down if requested. * * The {@see 'get_image_tag_class'} filter allows for changing the class name for the * image without having to use regular expressions on the HTML content. The * parameters are: what WordPress will use for the class, the Attachment ID, * image align value, and the size the image should be. * * The second filter, {@see 'get_image_tag'}, has the HTML content, which can then be * further manipulated by a plugin to change all attribute values and even HTML * content. * * @since 2.5.0 * * @param int $id Attachment ID. * @param string $alt Image description for the alt attribute. * @param string $title Image description for the title attribute. * @param string $align Part of the class name for aligning the image. * @param string|array $size Optional. Registered image size to retrieve a tag for. Accepts any * valid image size, or an array of width and height values in pixels * (in that order). Default 'medium'. * @return string HTML IMG element for given image attachment */ function get_image_tag( $id, $alt, $title, $align, $size = 'medium' ) { list( $img_src, $width, $height ) = image_downsize( $id, $size ); $hwstring = image_hwstring( $width, $height ); $title = $title ? 'title="' . esc_attr( $title ) . '" ' : ''; $class = 'align' . esc_attr( $align ) . ' size-' . esc_attr( $size ) . ' wp-image-' . $id; /** * Filters the value of the attachment's image tag class attribute. * * @since 2.6.0 * * @param string $class CSS class name or space-separated list of classes. * @param int $id Attachment ID. * @param string $align Part of the class name for aligning the image. * @param string|array $size Size of image. Image size or array of width and height values (in that order). * Default 'medium'. */ $class = apply_filters( 'get_image_tag_class', $class, $id, $align, $size ); $html = '' . esc_attr( $alt ) . ''; /** * Filters the HTML content for the image tag. * * @since 2.6.0 * * @param string $html HTML content for the image. * @param int $id Attachment ID. * @param string $alt Image description for the alt attribute. * @param string $title Image description for the title attribute. * @param string $align Part of the class name for aligning the image. * @param string|array $size Size of image. Image size or array of width and height values (in that order). * Default 'medium'. */ return apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); } /** * Calculates the new dimensions for a down-sampled image. * * If either width or height are empty, no constraint is applied on * that dimension. * * @since 2.5.0 * * @param int $current_width Current width of the image. * @param int $current_height Current height of the image. * @param int $max_width Optional. Max width in pixels to constrain to. Default 0. * @param int $max_height Optional. Max height in pixels to constrain to. Default 0. * @return int[] { * An array of width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } */ function wp_constrain_dimensions( $current_width, $current_height, $max_width = 0, $max_height = 0 ) { if ( ! $max_width && ! $max_height ) { return array( $current_width, $current_height ); } $width_ratio = 1.0; $height_ratio = 1.0; $did_width = false; $did_height = false; if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) { $width_ratio = $max_width / $current_width; $did_width = true; } if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) { $height_ratio = $max_height / $current_height; $did_height = true; } // Calculate the larger/smaller ratios. $smaller_ratio = min( $width_ratio, $height_ratio ); $larger_ratio = max( $width_ratio, $height_ratio ); if ( (int) round( $current_width * $larger_ratio ) > $max_width || (int) round( $current_height * $larger_ratio ) > $max_height ) { // The larger ratio is too big. It would result in an overflow. $ratio = $smaller_ratio; } else { // The larger ratio fits, and is likely to be a more "snug" fit. $ratio = $larger_ratio; } // Very small dimensions may result in 0, 1 should be the minimum. $w = max( 1, (int) round( $current_width * $ratio ) ); $h = max( 1, (int) round( $current_height * $ratio ) ); /* * Sometimes, due to rounding, we'll end up with a result like this: * 465x700 in a 177x177 box is 117x176... a pixel short. * We also have issues with recursive calls resulting in an ever-changing result. * Constraining to the result of a constraint should yield the original result. * Thus we look for dimensions that are one pixel shy of the max value and bump them up. */ // Note: $did_width means it is possible $smaller_ratio == $width_ratio. if ( $did_width && $w === $max_width - 1 ) { $w = $max_width; // Round it up. } // Note: $did_height means it is possible $smaller_ratio == $height_ratio. if ( $did_height && $h === $max_height - 1 ) { $h = $max_height; // Round it up. } /** * Filters dimensions to constrain down-sampled images to. * * @since 4.1.0 * * @param int[] $dimensions { * An array of width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } * @param int $current_width The current width of the image. * @param int $current_height The current height of the image. * @param int $max_width The maximum width permitted. * @param int $max_height The maximum height permitted. */ return apply_filters( 'wp_constrain_dimensions', array( $w, $h ), $current_width, $current_height, $max_width, $max_height ); } /** * Retrieves calculated resize dimensions for use in WP_Image_Editor. * * Calculates dimensions and coordinates for a resized image that fits * within a specified width and height. * * Cropping behavior is dependent on the value of $crop: * 1. If false (default), images will not be cropped. * 2. If an array in the form of array( x_crop_position, y_crop_position ): * - x_crop_position accepts 'left' 'center', or 'right'. * - y_crop_position accepts 'top', 'center', or 'bottom'. * Images will be cropped to the specified dimensions within the defined crop area. * 3. If true, images will be cropped to the specified dimensions using center positions. * * @since 2.5.0 * * @param int $orig_w Original width in pixels. * @param int $orig_h Original height in pixels. * @param int $dest_w New width in pixels. * @param int $dest_h New height in pixels. * @param bool|array $crop Optional. Whether to crop image to specified width and height or resize. * An array can specify positioning of the crop area. Default false. * @return array|false Returned array matches parameters for `imagecopyresampled()`. False on failure. */ function image_resize_dimensions( $orig_w, $orig_h, $dest_w, $dest_h, $crop = false ) { if ( $orig_w <= 0 || $orig_h <= 0 ) { return false; } // At least one of $dest_w or $dest_h must be specific. if ( $dest_w <= 0 && $dest_h <= 0 ) { return false; } /** * Filters whether to preempt calculating the image resize dimensions. * * Returning a non-null value from the filter will effectively short-circuit * image_resize_dimensions(), returning that value instead. * * @since 3.4.0 * * @param null|mixed $null Whether to preempt output of the resize dimensions. * @param int $orig_w Original width in pixels. * @param int $orig_h Original height in pixels. * @param int $dest_w New width in pixels. * @param int $dest_h New height in pixels. * @param bool|array $crop Whether to crop image to specified width and height or resize. * An array can specify positioning of the crop area. Default false. */ $output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop ); if ( null !== $output ) { return $output; } // Stop if the destination size is larger than the original image dimensions. if ( empty( $dest_h ) ) { if ( $orig_w < $dest_w ) { return false; } } elseif ( empty( $dest_w ) ) { if ( $orig_h < $dest_h ) { return false; } } else { if ( $orig_w < $dest_w && $orig_h < $dest_h ) { return false; } } if ( $crop ) { /* * Crop the largest possible portion of the original image that we can size to $dest_w x $dest_h. * Note that the requested crop dimensions are used as a maximum bounding box for the original image. * If the original image's width or height is less than the requested width or height * only the greater one will be cropped. * For example when the original image is 600x300, and the requested crop dimensions are 400x400, * the resulting image will be 400x300. */ $aspect_ratio = $orig_w / $orig_h; $new_w = min( $dest_w, $orig_w ); $new_h = min( $dest_h, $orig_h ); if ( ! $new_w ) { $new_w = (int) round( $new_h * $aspect_ratio ); } if ( ! $new_h ) { $new_h = (int) round( $new_w / $aspect_ratio ); } $size_ratio = max( $new_w / $orig_w, $new_h / $orig_h ); $crop_w = round( $new_w / $size_ratio ); $crop_h = round( $new_h / $size_ratio ); if ( ! is_array( $crop ) || count( $crop ) !== 2 ) { $crop = array( 'center', 'center' ); } list( $x, $y ) = $crop; if ( 'left' === $x ) { $s_x = 0; } elseif ( 'right' === $x ) { $s_x = $orig_w - $crop_w; } else { $s_x = floor( ( $orig_w - $crop_w ) / 2 ); } if ( 'top' === $y ) { $s_y = 0; } elseif ( 'bottom' === $y ) { $s_y = $orig_h - $crop_h; } else { $s_y = floor( ( $orig_h - $crop_h ) / 2 ); } } else { // Resize using $dest_w x $dest_h as a maximum bounding box. $crop_w = $orig_w; $crop_h = $orig_h; $s_x = 0; $s_y = 0; list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h ); } if ( wp_fuzzy_number_match( $new_w, $orig_w ) && wp_fuzzy_number_match( $new_h, $orig_h ) ) { // The new size has virtually the same dimensions as the original image. /** * Filters whether to proceed with making an image sub-size with identical dimensions * with the original/source image. Differences of 1px may be due to rounding and are ignored. * * @since 5.3.0 * * @param bool $proceed The filtered value. * @param int $orig_w Original image width. * @param int $orig_h Original image height. */ $proceed = (bool) apply_filters( 'wp_image_resize_identical_dimensions', false, $orig_w, $orig_h ); if ( ! $proceed ) { return false; } } // The return array matches the parameters to imagecopyresampled(). // int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h ); } /** * Resizes an image to make a thumbnail or intermediate size. * * The returned array has the file size, the image width, and image height. The * {@see 'image_make_intermediate_size'} filter can be used to hook in and change the * values of the returned array. The only parameter is the resized file path. * * @since 2.5.0 * * @param string $file File path. * @param int $width Image width. * @param int $height Image height. * @param bool $crop Optional. Whether to crop image to specified width and height or resize. * Default false. * @return array|false Metadata array on success. False if no image was created. */ function image_make_intermediate_size( $file, $width, $height, $crop = false ) { if ( $width || $height ) { $editor = wp_get_image_editor( $file ); if ( is_wp_error( $editor ) || is_wp_error( $editor->resize( $width, $height, $crop ) ) ) { return false; } $resized_file = $editor->save(); if ( ! is_wp_error( $resized_file ) && $resized_file ) { unset( $resized_file['path'] ); return $resized_file; } } return false; } /** * Helper function to test if aspect ratios for two images match. * * @since 4.6.0 * * @param int $source_width Width of the first image in pixels. * @param int $source_height Height of the first image in pixels. * @param int $target_width Width of the second image in pixels. * @param int $target_height Height of the second image in pixels. * @return bool True if aspect ratios match within 1px. False if not. */ function wp_image_matches_ratio( $source_width, $source_height, $target_width, $target_height ) { /* * To test for varying crops, we constrain the dimensions of the larger image * to the dimensions of the smaller image and see if they match. */ if ( $source_width > $target_width ) { $constrained_size = wp_constrain_dimensions( $source_width, $source_height, $target_width ); $expected_size = array( $target_width, $target_height ); } else { $constrained_size = wp_constrain_dimensions( $target_width, $target_height, $source_width ); $expected_size = array( $source_width, $source_height ); } // If the image dimensions are within 1px of the expected size, we consider it a match. $matched = ( wp_fuzzy_number_match( $constrained_size[0], $expected_size[0] ) && wp_fuzzy_number_match( $constrained_size[1], $expected_size[1] ) ); return $matched; } /** * Retrieves the image's intermediate size (resized) path, width, and height. * * The $size parameter can be an array with the width and height respectively. * If the size matches the 'sizes' metadata array for width and height, then it * will be used. If there is no direct match, then the nearest image size larger * than the specified size will be used. If nothing is found, then the function * will break out and return false. * * The metadata 'sizes' is used for compatible sizes that can be used for the * parameter $size value. * * The url path will be given, when the $size parameter is a string. * * If you are passing an array for the $size, you should consider using * add_image_size() so that a cropped version is generated. It's much more * efficient than having to find the closest-sized image and then having the * browser scale down the image. * * @since 2.5.0 * * @param int $post_id Attachment ID. * @param array|string $size Optional. Image size. Accepts any valid image size, or an array * of width and height values in pixels (in that order). * Default 'thumbnail'. * @return array|false { * Array of file relative path, width, and height on success. Additionally includes absolute * path and URL if registered size is passed to $size parameter. False on failure. * * @type string $file Image's path relative to uploads directory * @type int $width Width of image * @type int $height Height of image * @type string $path Image's absolute filesystem path. * @type string $url Image's URL. * } */ function image_get_intermediate_size( $post_id, $size = 'thumbnail' ) { $imagedata = wp_get_attachment_metadata( $post_id ); if ( ! $size || ! is_array( $imagedata ) || empty( $imagedata['sizes'] ) ) { return false; } $data = array(); // Find the best match when '$size' is an array. if ( is_array( $size ) ) { $candidates = array(); if ( ! isset( $imagedata['file'] ) && isset( $imagedata['sizes']['full'] ) ) { $imagedata['height'] = $imagedata['sizes']['full']['height']; $imagedata['width'] = $imagedata['sizes']['full']['width']; } foreach ( $imagedata['sizes'] as $_size => $data ) { // If there's an exact match to an existing image size, short circuit. if ( intval( $data['width'] ) === intval( $size[0] ) && intval( $data['height'] ) === intval( $size[1] ) ) { $candidates[ $data['width'] * $data['height'] ] = $data; break; } // If it's not an exact match, consider larger sizes with the same aspect ratio. if ( $data['width'] >= $size[0] && $data['height'] >= $size[1] ) { // If '0' is passed to either size, we test ratios against the original file. if ( 0 === $size[0] || 0 === $size[1] ) { $same_ratio = wp_image_matches_ratio( $data['width'], $data['height'], $imagedata['width'], $imagedata['height'] ); } else { $same_ratio = wp_image_matches_ratio( $data['width'], $data['height'], $size[0], $size[1] ); } if ( $same_ratio ) { $candidates[ $data['width'] * $data['height'] ] = $data; } } } if ( ! empty( $candidates ) ) { // Sort the array by size if we have more than one candidate. if ( 1 < count( $candidates ) ) { ksort( $candidates ); } $data = array_shift( $candidates ); /* * When the size requested is smaller than the thumbnail dimensions, we * fall back to the thumbnail size to maintain backward compatibility with * pre 4.6 versions of WordPress. */ } elseif ( ! empty( $imagedata['sizes']['thumbnail'] ) && $imagedata['sizes']['thumbnail']['width'] >= $size[0] && $imagedata['sizes']['thumbnail']['width'] >= $size[1] ) { $data = $imagedata['sizes']['thumbnail']; } else { return false; } // Constrain the width and height attributes to the requested values. list( $data['width'], $data['height'] ) = image_constrain_size_for_editor( $data['width'], $data['height'], $size ); } elseif ( ! empty( $imagedata['sizes'][ $size ] ) ) { $data = $imagedata['sizes'][ $size ]; } // If we still don't have a match at this point, return false. if ( empty( $data ) ) { return false; } // Include the full filesystem path of the intermediate file. if ( empty( $data['path'] ) && ! empty( $data['file'] ) && ! empty( $imagedata['file'] ) ) { $file_url = wp_get_attachment_url( $post_id ); $data['path'] = path_join( dirname( $imagedata['file'] ), $data['file'] ); $data['url'] = path_join( dirname( $file_url ), $data['file'] ); } /** * Filters the output of image_get_intermediate_size() * * @since 4.4.0 * * @see image_get_intermediate_size() * * @param array $data Array of file relative path, width, and height on success. May also include * file absolute path and URL. * @param int $post_id The post_id of the image attachment * @param string|array $size Registered image size or flat array of initially-requested height and width * dimensions (in that order). */ return apply_filters( 'image_get_intermediate_size', $data, $post_id, $size ); } /** * Gets the available intermediate image size names. * * @since 3.0.0 * * @return string[] An array of image size names. */ function get_intermediate_image_sizes() { $default_sizes = array( 'thumbnail', 'medium', 'medium_large', 'large' ); $additional_sizes = wp_get_additional_image_sizes(); if ( ! empty( $additional_sizes ) ) { $default_sizes = array_merge( $default_sizes, array_keys( $additional_sizes ) ); } /** * Filters the list of intermediate image sizes. * * @since 2.5.0 * * @param string[] $default_sizes An array of intermediate image size names. Defaults * are 'thumbnail', 'medium', 'medium_large', 'large'. */ return apply_filters( 'intermediate_image_sizes', $default_sizes ); } /** * Returns a normalized list of all currently registered image sub-sizes. * * @since 5.3.0 * @uses wp_get_additional_image_sizes() * @uses get_intermediate_image_sizes() * * @return array Associative array of the registered image sub-sizes. */ function wp_get_registered_image_subsizes() { $additional_sizes = wp_get_additional_image_sizes(); $all_sizes = array(); foreach ( get_intermediate_image_sizes() as $size_name ) { $size_data = array( 'width' => 0, 'height' => 0, 'crop' => false, ); if ( isset( $additional_sizes[ $size_name ]['width'] ) ) { // For sizes added by plugins and themes. $size_data['width'] = intval( $additional_sizes[ $size_name ]['width'] ); } else { // For default sizes set in options. $size_data['width'] = intval( get_option( "{$size_name}_size_w" ) ); } if ( isset( $additional_sizes[ $size_name ]['height'] ) ) { $size_data['height'] = intval( $additional_sizes[ $size_name ]['height'] ); } else { $size_data['height'] = intval( get_option( "{$size_name}_size_h" ) ); } if ( empty( $size_data['width'] ) && empty( $size_data['height'] ) ) { // This size isn't set. continue; } if ( isset( $additional_sizes[ $size_name ]['crop'] ) ) { $size_data['crop'] = $additional_sizes[ $size_name ]['crop']; } else { $size_data['crop'] = get_option( "{$size_name}_crop" ); } if ( ! is_array( $size_data['crop'] ) || empty( $size_data['crop'] ) ) { $size_data['crop'] = (bool) $size_data['crop']; } $all_sizes[ $size_name ] = $size_data; } return $all_sizes; } /** * Retrieves an image to represent an attachment. * * @since 2.5.0 * * @param int $attachment_id Image attachment ID. * @param string|int[] $size Optional. Image size. Accepts any valid image size name, or an array of width * and height values in pixels (in that order). Default 'thumbnail'. * @param bool $icon Optional. Whether the image should fall back to a mime type icon. Default false. * @return array|false { * Array of image data, or boolean false if no image is available. * * @type string $0 Image source URL. * @type int $1 Image width in pixels. * @type int $2 Image height in pixels. * @type bool $3 Whether the image is a resized image. * } */ function wp_get_attachment_image_src( $attachment_id, $size = 'thumbnail', $icon = false ) { // Get a thumbnail or intermediate image if there is one. $image = image_downsize( $attachment_id, $size ); if ( ! $image ) { $src = false; if ( $icon ) { $src = wp_mime_type_icon( $attachment_id ); if ( $src ) { /** This filter is documented in wp-includes/post.php */ $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' ); $src_file = $icon_dir . '/' . wp_basename( $src ); list( $width, $height ) = @getimagesize( $src_file ); } } if ( $src && $width && $height ) { $image = array( $src, $width, $height, false ); } } /** * Filters the attachment image source result. * * @since 4.3.0 * * @param array|false $image { * Array of image data, or boolean false if no image is available. * * @type string $0 Image source URL. * @type int $1 Image width in pixels. * @type int $2 Image height in pixels. * @type bool $3 Whether the image is a resized image. * } * @param int $attachment_id Image attachment ID. * @param string|int[] $size Requested size of image. Image size name, or array of width * and height values (in that order). * @param bool $icon Whether the image should be treated as an icon. */ return apply_filters( 'wp_get_attachment_image_src', $image, $attachment_id, $size, $icon ); } /** * Get an HTML img element representing an image attachment * * While `$size` will accept an array, it is better to register a size with * add_image_size() so that a cropped version is generated. It's much more * efficient than having to find the closest-sized image and then having the * browser scale down the image. * * @since 2.5.0 * * @param int $attachment_id Image attachment ID. * @param string|array $size Optional. Image size. Accepts any valid image size, or an array of width * and height values in pixels (in that order). Default 'thumbnail'. * @param bool $icon Optional. Whether the image should be treated as an icon. Default false. * @param string|array $attr { * Optional. Attributes for the image markup. * * @type string $src Image attachment URL. * @type string $class CSS class name or space-separated list of classes. * Default `attachment-$size_class size-$size_class`, * where `$size_class` is the image size being requested. * @type string $alt Image description for the alt attribute. * @type string $srcset The 'srcset' attribute value. * @type string $sizes The 'sizes' attribute value. * } * @return string HTML img element or empty string on failure. */ function wp_get_attachment_image( $attachment_id, $size = 'thumbnail', $icon = false, $attr = '' ) { $html = ''; $image = wp_get_attachment_image_src( $attachment_id, $size, $icon ); if ( $image ) { list( $src, $width, $height ) = $image; $attachment = get_post( $attachment_id ); $hwstring = image_hwstring( $width, $height ); $size_class = $size; if ( is_array( $size_class ) ) { $size_class = join( 'x', $size_class ); } $default_attr = array( 'src' => $src, 'class' => "attachment-$size_class size-$size_class", 'alt' => trim( strip_tags( get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ) ) ), ); // Add `loading` attribute. if ( wp_lazy_loading_enabled( 'img', 'wp_get_attachment_image' ) ) { $default_attr['loading'] = 'lazy'; } $attr = wp_parse_args( $attr, $default_attr ); // If `loading` attribute default of `lazy` is overridden for this // image to omit the attribute, ensure it is not included. if ( array_key_exists( 'loading', $attr ) && ! $attr['loading'] ) { unset( $attr['loading'] ); } // Generate 'srcset' and 'sizes' if not already present. if ( empty( $attr['srcset'] ) ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); if ( is_array( $image_meta ) ) { $size_array = array( absint( $width ), absint( $height ) ); $srcset = wp_calculate_image_srcset( $size_array, $src, $image_meta, $attachment_id ); $sizes = wp_calculate_image_sizes( $size_array, $src, $image_meta, $attachment_id ); if ( $srcset && ( $sizes || ! empty( $attr['sizes'] ) ) ) { $attr['srcset'] = $srcset; if ( empty( $attr['sizes'] ) ) { $attr['sizes'] = $sizes; } } } } /** * Filters the list of attachment image attributes. * * @since 2.8.0 * * @param array $attr Array of attribute values for the image markup, keyed by attribute name. * See wp_get_attachment_image(). * @param WP_Post $attachment Image attachment post. * @param string|array $size Requested size. Image size or array of width and height values * (in that order). Default 'thumbnail'. */ $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment, $size ); $attr = array_map( 'esc_attr', $attr ); $html = rtrim( " $value ) { $html .= " $name=" . '"' . $value . '"'; } $html .= ' />'; } return $html; } /** * Get the URL of an image attachment. * * @since 4.4.0 * * @param int $attachment_id Image attachment ID. * @param string|array $size Optional. Image size to retrieve. Accepts any valid image size, or an array * of width and height values in pixels (in that order). Default 'thumbnail'. * @param bool $icon Optional. Whether the image should be treated as an icon. Default false. * @return string|false Attachment URL or false if no image is available. */ function wp_get_attachment_image_url( $attachment_id, $size = 'thumbnail', $icon = false ) { $image = wp_get_attachment_image_src( $attachment_id, $size, $icon ); return isset( $image['0'] ) ? $image['0'] : false; } /** * Get the attachment path relative to the upload directory. * * @since 4.4.1 * @access private * * @param string $file Attachment file name. * @return string Attachment path relative to the upload directory. */ function _wp_get_attachment_relative_path( $file ) { $dirname = dirname( $file ); if ( '.' === $dirname ) { return ''; } if ( false !== strpos( $dirname, 'wp-content/uploads' ) ) { // Get the directory name relative to the upload directory (back compat for pre-2.7 uploads). $dirname = substr( $dirname, strpos( $dirname, 'wp-content/uploads' ) + 18 ); $dirname = ltrim( $dirname, '/' ); } return $dirname; } /** * Get the image size as array from its meta data. * * Used for responsive images. * * @since 4.4.0 * @access private * * @param string $size_name Image size. Accepts any valid image size name ('thumbnail', 'medium', etc.). * @param array $image_meta The image meta data. * @return array|bool The image meta data as returned by `wp_get_attachment_metadata()`. */ function _wp_get_image_size_from_meta( $size_name, $image_meta ) { if ( 'full' === $size_name ) { return array( absint( $image_meta['width'] ), absint( $image_meta['height'] ), ); } elseif ( ! empty( $image_meta['sizes'][ $size_name ] ) ) { return array( absint( $image_meta['sizes'][ $size_name ]['width'] ), absint( $image_meta['sizes'][ $size_name ]['height'] ), ); } return false; } /** * Retrieves the value for an image attachment's 'srcset' attribute. * * @since 4.4.0 * * @see wp_calculate_image_srcset() * * @param int $attachment_id Image attachment ID. * @param array|string $size Optional. Image size. Accepts any valid image size, or an array of * width and height values in pixels (in that order). Default 'medium'. * @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'. * Default null. * @return string|bool A 'srcset' value string or false. */ function wp_get_attachment_image_srcset( $attachment_id, $size = 'medium', $image_meta = null ) { $image = wp_get_attachment_image_src( $attachment_id, $size ); if ( ! $image ) { return false; } if ( ! is_array( $image_meta ) ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); } $image_src = $image[0]; $size_array = array( absint( $image[1] ), absint( $image[2] ), ); return wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id ); } /** * A helper function to calculate the image sources to include in a 'srcset' attribute. * * @since 4.4.0 * * @param int[] $size_array { * An array of width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } * @param string $image_src The 'src' of the image. * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id Optional. The image attachment ID. Default 0. * @return string|bool The 'srcset' attribute value. False on error or when only one source exists. */ function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id = 0 ) { /** * Let plugins pre-filter the image meta to be able to fix inconsistencies in the stored data. * * @since 4.5.0 * * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int[] $size_array { * An array of requested width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } * @param string $image_src The 'src' of the image. * @param int $attachment_id The image attachment ID or 0 if not supplied. */ $image_meta = apply_filters( 'wp_calculate_image_srcset_meta', $image_meta, $size_array, $image_src, $attachment_id ); if ( empty( $image_meta['sizes'] ) || ! isset( $image_meta['file'] ) || strlen( $image_meta['file'] ) < 4 ) { return false; } $image_sizes = $image_meta['sizes']; // Get the width and height of the image. $image_width = (int) $size_array[0]; $image_height = (int) $size_array[1]; // Bail early if error/no width. if ( $image_width < 1 ) { return false; } $image_basename = wp_basename( $image_meta['file'] ); /* * WordPress flattens animated GIFs into one frame when generating intermediate sizes. * To avoid hiding animation in user content, if src is a full size GIF, a srcset attribute is not generated. * If src is an intermediate size GIF, the full size is excluded from srcset to keep a flattened GIF from becoming animated. */ if ( ! isset( $image_sizes['thumbnail']['mime-type'] ) || 'image/gif' !== $image_sizes['thumbnail']['mime-type'] ) { $image_sizes[] = array( 'width' => $image_meta['width'], 'height' => $image_meta['height'], 'file' => $image_basename, ); } elseif ( strpos( $image_src, $image_meta['file'] ) ) { return false; } // Retrieve the uploads sub-directory from the full size image. $dirname = _wp_get_attachment_relative_path( $image_meta['file'] ); if ( $dirname ) { $dirname = trailingslashit( $dirname ); } $upload_dir = wp_get_upload_dir(); $image_baseurl = trailingslashit( $upload_dir['baseurl'] ) . $dirname; /* * If currently on HTTPS, prefer HTTPS URLs when we know they're supported by the domain * (which is to say, when they share the domain name of the current request). */ if ( is_ssl() && 'https' !== substr( $image_baseurl, 0, 5 ) && parse_url( $image_baseurl, PHP_URL_HOST ) === $_SERVER['HTTP_HOST'] ) { $image_baseurl = set_url_scheme( $image_baseurl, 'https' ); } /* * Images that have been edited in WordPress after being uploaded will * contain a unique hash. Look for that hash and use it later to filter * out images that are leftovers from previous versions. */ $image_edited = preg_match( '/-e[0-9]{13}/', wp_basename( $image_src ), $image_edit_hash ); /** * Filters the maximum image width to be included in a 'srcset' attribute. * * @since 4.4.0 * * @param int $max_width The maximum image width to be included in the 'srcset'. Default '2048'. * @param int[] $size_array { * An array of requested width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } */ $max_srcset_image_width = apply_filters( 'max_srcset_image_width', 2048, $size_array ); // Array to hold URL candidates. $sources = array(); /** * To make sure the ID matches our image src, we will check to see if any sizes in our attachment * meta match our $image_src. If no matches are found we don't return a srcset to avoid serving * an incorrect image. See #35045. */ $src_matched = false; /* * Loop through available images. Only use images that are resized * versions of the same edit. */ foreach ( $image_sizes as $image ) { $is_src = false; // Check if image meta isn't corrupted. if ( ! is_array( $image ) ) { continue; } // If the file name is part of the `src`, we've confirmed a match. if ( ! $src_matched && false !== strpos( $image_src, $dirname . $image['file'] ) ) { $src_matched = true; $is_src = true; } // Filter out images that are from previous edits. if ( $image_edited && ! strpos( $image['file'], $image_edit_hash[0] ) ) { continue; } /* * Filters out images that are wider than '$max_srcset_image_width' unless * that file is in the 'src' attribute. */ if ( $max_srcset_image_width && $image['width'] > $max_srcset_image_width && ! $is_src ) { continue; } // If the image dimensions are within 1px of the expected size, use it. if ( wp_image_matches_ratio( $image_width, $image_height, $image['width'], $image['height'] ) ) { // Add the URL, descriptor, and value to the sources array to be returned. $source = array( 'url' => $image_baseurl . $image['file'], 'descriptor' => 'w', 'value' => $image['width'], ); // The 'src' image has to be the first in the 'srcset', because of a bug in iOS8. See #35030. if ( $is_src ) { $sources = array( $image['width'] => $source ) + $sources; } else { $sources[ $image['width'] ] = $source; } } } /** * Filters an image's 'srcset' sources. * * @since 4.4.0 * * @param array $sources { * One or more arrays of source data to include in the 'srcset'. * * @type array $width { * @type string $url The URL of an image source. * @type string $descriptor The descriptor type used in the image candidate string, * either 'w' or 'x'. * @type int $value The source width if paired with a 'w' descriptor, or a * pixel density value if paired with an 'x' descriptor. * } * } * @param array $size_array { * An array of requested width and height values. * * @type int $0 The width in pixels. * @type int $1 The height in pixels. * } * @param string $image_src The 'src' of the image. * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id Image attachment ID or 0. */ $sources = apply_filters( 'wp_calculate_image_srcset', $sources, $size_array, $image_src, $image_meta, $attachment_id ); // Only return a 'srcset' value if there is more than one source. if ( ! $src_matched || ! is_array( $sources ) || count( $sources ) < 2 ) { return false; } $srcset = ''; foreach ( $sources as $source ) { $srcset .= str_replace( ' ', '%20', $source['url'] ) . ' ' . $source['value'] . $source['descriptor'] . ', '; } return rtrim( $srcset, ', ' ); } /** * Retrieves the value for an image attachment's 'sizes' attribute. * * @since 4.4.0 * * @see wp_calculate_image_sizes() * * @param int $attachment_id Image attachment ID. * @param array|string $size Optional. Image size. Accepts any valid image size, or an array of width * and height values in pixels (in that order). Default 'medium'. * @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'. * Default null. * @return string|bool A valid source size value for use in a 'sizes' attribute or false. */ function wp_get_attachment_image_sizes( $attachment_id, $size = 'medium', $image_meta = null ) { $image = wp_get_attachment_image_src( $attachment_id, $size ); if ( ! $image ) { return false; } if ( ! is_array( $image_meta ) ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); } $image_src = $image[0]; $size_array = array( absint( $image[1] ), absint( $image[2] ), ); return wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id ); } /** * Creates a 'sizes' attribute value for an image. * * @since 4.4.0 * * @param array|string $size Image size to retrieve. Accepts any valid image size, or an array * of width and height values in pixels (in that order). Default 'medium'. * @param string $image_src Optional. The URL to the image file. Default null. * @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'. * Default null. * @param int $attachment_id Optional. Image attachment ID. Either `$image_meta` or `$attachment_id` * is needed when using the image size name as argument for `$size`. Default 0. * @return string|bool A valid source size value for use in a 'sizes' attribute or false. */ function wp_calculate_image_sizes( $size, $image_src = null, $image_meta = null, $attachment_id = 0 ) { $width = 0; if ( is_array( $size ) ) { $width = absint( $size[0] ); } elseif ( is_string( $size ) ) { if ( ! $image_meta && $attachment_id ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); } if ( is_array( $image_meta ) ) { $size_array = _wp_get_image_size_from_meta( $size, $image_meta ); if ( $size_array ) { $width = absint( $size_array[0] ); } } } if ( ! $width ) { return false; } // Setup the default 'sizes' attribute. $sizes = sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $width ); /** * Filters the output of 'wp_calculate_image_sizes()'. * * @since 4.4.0 * * @param string $sizes A source size value for use in a 'sizes' attribute. * @param array|string $size Requested size. Image size or array of width and height values * in pixels (in that order). * @param string|null $image_src The URL to the image file or null. * @param array|null $image_meta The image meta data as returned by wp_get_attachment_metadata() or null. * @param int $attachment_id Image attachment ID of the original image or 0. */ return apply_filters( 'wp_calculate_image_sizes', $sizes, $size, $image_src, $image_meta, $attachment_id ); } /** * Determines if the image meta data is for the image source file. * * The image meta data is retrieved by attachment post ID. In some cases the post IDs may change. * For example when the website is exported and imported at another website. Then the * attachment post IDs that are in post_content for the exported website may not match * the same attachments at the new website. * * @since 5.5.0 * * @param string $image_location The full path or URI to the image file. * @param array $image_meta The attachment meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id Optional. The image attachment ID. Default 0. * @return bool Whether the image meta is for this image file. */ function wp_image_file_matches_image_meta( $image_location, $image_meta, $attachment_id = 0 ) { $match = false; // Ensure the $image_meta is valid. if ( isset( $image_meta['file'] ) && strlen( $image_meta['file'] ) > 4 ) { // Remove quiery args if image URI. list( $image_location ) = explode( '?', $image_location ); // Check if the relative image path from the image meta is at the end of $image_location. if ( strrpos( $image_location, $image_meta['file'] ) === strlen( $image_location ) - strlen( $image_meta['file'] ) ) { $match = true; } else { // Retrieve the uploads sub-directory from the full size image. $dirname = _wp_get_attachment_relative_path( $image_meta['file'] ); if ( $dirname ) { $dirname = trailingslashit( $dirname ); } if ( ! empty( $image_meta['original_image'] ) ) { $relative_path = $dirname . $image_meta['original_image']; if ( strrpos( $image_location, $relative_path ) === strlen( $image_location ) - strlen( $relative_path ) ) { $match = true; } } if ( ! $match && ! empty( $image_meta['sizes'] ) ) { foreach ( $image_meta['sizes'] as $image_size_data ) { $relative_path = $dirname . $image_size_data['file']; if ( strrpos( $image_location, $relative_path ) === strlen( $image_location ) - strlen( $relative_path ) ) { $match = true; break; } } } } } /** * Filter whether an image path or URI matches image meta. * * @since 5.5.0 * * @param bool $match Whether the image relative path from the image meta * matches the end of the URI or path to the image file. * @param string $image_location Full path or URI to the tested image file. * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id The image attachment ID or 0 if not supplied. */ return apply_filters( 'wp_image_file_matches_image_meta', $match, $image_location, $image_meta, $attachment_id ); } /** * Determines an image's width and height dimensions based on the source file. * * @since 5.5.0 * * @param string $image_src The image source file. * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id Optional. The image attachment ID. Default 0. * @return array|false Array with first element being the width and second element being the height, * or false if dimensions cannot be determined. */ function wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id = 0 ) { if ( ! wp_image_file_matches_image_meta( $image_src, $image_meta, $attachment_id ) ) { return false; } // Is it a full size image? if ( strpos( $image_src, $image_meta['file'] ) !== false ) { return array( (int) $image_meta['width'], (int) $image_meta['height'], ); } if ( ! empty( $image_meta['sizes'] ) ) { $src_filename = wp_basename( $image_src ); foreach ( $image_meta['sizes'] as $image_size_data ) { if ( $src_filename === $image_size_data['file'] ) { return array( (int) $image_size_data['width'], (int) $image_size_data['height'], ); } } } return false; } /** * Adds 'srcset' and 'sizes' attributes to an existing 'img' element. * * @since 4.4.0 * * @see wp_calculate_image_srcset() * @see wp_calculate_image_sizes() * * @param string $image An HTML 'img' element to be filtered. * @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'. * @param int $attachment_id Image attachment ID. * @return string Converted 'img' element with 'srcset' and 'sizes' attributes added. */ function wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id ) { // Ensure the image meta exists. if ( empty( $image_meta['sizes'] ) ) { return $image; } $image_src = preg_match( '/src="([^"]+)"/', $image, $match_src ) ? $match_src[1] : ''; list( $image_src ) = explode( '?', $image_src ); // Return early if we couldn't get the image source. if ( ! $image_src ) { return $image; } // Bail early if an image has been inserted and later edited. if ( preg_match( '/-e[0-9]{13}/', $image_meta['file'], $img_edit_hash ) && strpos( wp_basename( $image_src ), $img_edit_hash[0] ) === false ) { return $image; } $width = preg_match( '/ width="([0-9]+)"/', $image, $match_width ) ? (int) $match_width[1] : 0; $height = preg_match( '/ height="([0-9]+)"/', $image, $match_height ) ? (int) $match_height[1] : 0; if ( $width && $height ) { $size_array = array( $width, $height ); } else { $size_array = wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id ); if ( ! $size_array ) { return $image; } } $srcset = wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id ); if ( $srcset ) { // Check if there is already a 'sizes' attribute. $sizes = strpos( $image, ' sizes=' ); if ( ! $sizes ) { $sizes = wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id ); } } if ( $srcset && $sizes ) { // Format the 'srcset' and 'sizes' string and escape attributes. $attr = sprintf( ' srcset="%s"', esc_attr( $srcset ) ); if ( is_string( $sizes ) ) { $attr .= sprintf( ' sizes="%s"', esc_attr( $sizes ) ); } // Add the srcset and sizes attributes to the image markup. return preg_replace( '/]+?)[\/ ]*>/', '', $image ); } return $image; } /** * Determine whether to add the `loading` attribute to the specified tag in the specified context. * * @since 5.5.0 * * @param string $tag_name The tag name. * @param string $context Additional context, like the current filter name or the function name from where this was called. * @return bool Whether to add the attribute. */ function wp_lazy_loading_enabled( $tag_name, $context ) { // By default add to all 'img' tags. // See https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-loading $default = ( 'img' === $tag_name ); /** * Filters whether to add the `loading` attribute to the specified tag in the specified context. * * @since 5.5.0 * * @param bool $default Default value. * @param string $tag_name The tag name. * @param string $context Additional context, like the current filter name or the function name from where this was called. */ return (bool) apply_filters( 'wp_lazy_loading_enabled', $default, $tag_name, $context ); } /** * Modifies specific HTML tags in post content to include new browser and HTML technologies * that may not have existed at the time of post creation. These modifications currently include * adding `srcset`, `sizes`, and `loading` attributes to `img` HTML tags. Future similar * optimizations should be added/expected here. * * @since 5.5.0 * * @see wp_img_tag_add_width_and_height_attr() * @see wp_img_tag_add_srcset_and_sizes_attr() * @see wp_img_tag_add_loading_attr() * * @param string $content The HTML content to be filtered. * @param string $context Optional. Additional context to pass to the filters. * Defaults to `current_filter()` when not set. * @return string Converted content with images modified. */ function wp_filter_content_tags( $content, $context = null ) { if ( null === $context ) { $context = current_filter(); } $add_loading_attr = wp_lazy_loading_enabled( 'img', $context ); if ( false === strpos( $content, ']+>/', $content, $matches ) ) { return $content; } // List of the unique `img` tags found in $content. $images = array(); foreach ( $matches[0] as $image ) { if ( preg_match( '/wp-image-([0-9]+)/i', $image, $class_id ) ) { $attachment_id = absint( $class_id[1] ); if ( $attachment_id ) { // If exactly the same image tag is used more than once, overwrite it. // All identical tags will be replaced later with 'str_replace()'. $images[ $image ] = $attachment_id; continue; } } $images[ $image ] = 0; } // Reduce the array to unique attachment IDs. $attachment_ids = array_unique( array_filter( array_values( $images ) ) ); if ( count( $attachment_ids ) > 1 ) { /* * Warm the object cache with post and meta information for all found * images to avoid making individual database calls. */ _prime_post_caches( $attachment_ids, false, true ); } foreach ( $images as $image => $attachment_id ) { $filtered_image = $image; // Add 'width' and 'height' attributes if applicable. if ( $attachment_id > 0 && false === strpos( $filtered_image, ' width=' ) && false === strpos( $filtered_image, ' height=' ) ) { $filtered_image = wp_img_tag_add_width_and_height_attr( $filtered_image, $context, $attachment_id ); } // Add 'srcset' and 'sizes' attributes if applicable. if ( $attachment_id > 0 && false === strpos( $filtered_image, ' srcset=' ) ) { $filtered_image = wp_img_tag_add_srcset_and_sizes_attr( $filtered_image, $context, $attachment_id ); } // Add 'loading' attribute if applicable. if ( $add_loading_attr && false === strpos( $filtered_image, ' loading=' ) ) { $filtered_image = wp_img_tag_add_loading_attr( $filtered_image, $context ); } if ( $filtered_image !== $image ) { $content = str_replace( $image, $filtered_image, $content ); } } return $content; } /** * Adds `loading` attribute to an `img` HTML tag. * * @since 5.5.0 * * @param string $image The HTML `img` tag where the attribute should be added. * @param string $context Additional context to pass to the filters. * @return string Converted `img` tag with `loading` attribute added. */ function wp_img_tag_add_loading_attr( $image, $context ) { /** * Filters the `loading` attribute value. Default `lazy`. * * Returning `false` or an empty string will not add the attribute. * Returning `true` will add the default value. * * @since 5.5.0 * * @param string|bool $value The `loading` attribute value. Returning a falsey value will result in * the attribute being omitted for the image. Default is `lazy`. * @param string $image The HTML `img` tag to be filtered. * @param string $context Additional context about how the function was called or where the img tag is. */ $value = apply_filters( 'wp_img_tag_add_loading_attr', 'lazy', $image, $context ); if ( $value ) { if ( ! in_array( $value, array( 'lazy', 'eager' ), true ) ) { $value = 'lazy'; } // Images should have source and dimension attributes for the `loading` attribute to be added. if ( false === strpos( $image, ' src="' ) || false === strpos( $image, ' width="' ) || false === strpos( $image, ' height="' ) ) { return $image; } return str_replace( '` or `
`. * @type string $caption_id ID of the caption element, i.e. `
` or `

`. * @type string $align Class name that aligns the caption. Default 'alignnone'. Accepts 'alignleft', * 'aligncenter', alignright', 'alignnone'. * @type int $width The width of the caption, in pixels. * @type string $caption The caption text. * @type string $class Additional class name(s) added to the caption container. * } * @param string $content Shortcode content. * @return string HTML content to display the caption. */ function img_caption_shortcode( $attr, $content = null ) { // New-style shortcode with the caption inside the shortcode with the link and image tags. if ( ! isset( $attr['caption'] ) ) { if ( preg_match( '#((?:]+>\s*)?]+>(?:\s*)?)(.*)#is', $content, $matches ) ) { $content = $matches[1]; $attr['caption'] = trim( $matches[2] ); } } elseif ( strpos( $attr['caption'], '<' ) !== false ) { $attr['caption'] = wp_kses( $attr['caption'], 'post' ); } /** * Filters the default caption shortcode output. * * If the filtered output isn't empty, it will be used instead of generating * the default caption template. * * @since 2.6.0 * * @see img_caption_shortcode() * * @param string $output The caption output. Default empty. * @param array $attr Attributes of the caption shortcode. * @param string $content The image element, possibly wrapped in a hyperlink. */ $output = apply_filters( 'img_caption_shortcode', '', $attr, $content ); if ( ! empty( $output ) ) { return $output; } $atts = shortcode_atts( array( 'id' => '', 'caption_id' => '', 'align' => 'alignnone', 'width' => '', 'caption' => '', 'class' => '', ), $attr, 'caption' ); $atts['width'] = (int) $atts['width']; if ( $atts['width'] < 1 || empty( $atts['caption'] ) ) { return $content; } $id = ''; $caption_id = ''; $describedby = ''; if ( $atts['id'] ) { $atts['id'] = sanitize_html_class( $atts['id'] ); $id = 'id="' . esc_attr( $atts['id'] ) . '" '; } if ( $atts['caption_id'] ) { $atts['caption_id'] = sanitize_html_class( $atts['caption_id'] ); } elseif ( $atts['id'] ) { $atts['caption_id'] = 'caption-' . str_replace( '_', '-', $atts['id'] ); } if ( $atts['caption_id'] ) { $caption_id = 'id="' . esc_attr( $atts['caption_id'] ) . '" '; $describedby = 'aria-describedby="' . esc_attr( $atts['caption_id'] ) . '" '; } $class = trim( 'wp-caption ' . $atts['align'] . ' ' . $atts['class'] ); $html5 = current_theme_supports( 'html5', 'caption' ); // HTML5 captions never added the extra 10px to the image width. $width = $html5 ? $atts['width'] : ( 10 + $atts['width'] ); /** * Filters the width of an image's caption. * * By default, the caption is 10 pixels greater than the width of the image, * to prevent post content from running up against a floated image. * * @since 3.7.0 * * @see img_caption_shortcode() * * @param int $width Width of the caption in pixels. To remove this inline style, * return zero. * @param array $atts Attributes of the caption shortcode. * @param string $content The image element, possibly wrapped in a hyperlink. */ $caption_width = apply_filters( 'img_caption_shortcode_width', $width, $atts, $content ); $style = ''; if ( $caption_width ) { $style = 'style="width: ' . (int) $caption_width . 'px" '; } if ( $html5 ) { $html = sprintf( '

%s%s
', $id, $describedby, $style, esc_attr( $class ), do_shortcode( $content ), sprintf( '
%s
', $caption_id, $atts['caption'] ) ); } else { $html = sprintf( '
%s%s
', $id, $style, esc_attr( $class ), str_replace( '%s

', $caption_id, $atts['caption'] ) ); } return $html; } add_shortcode( 'gallery', 'gallery_shortcode' ); /** * Builds the Gallery shortcode output. * * This implements the functionality of the Gallery Shortcode for displaying * WordPress images on a post. * * @since 2.5.0 * * @param array $attr { * Attributes of the gallery shortcode. * * @type string $order Order of the images in the gallery. Default 'ASC'. Accepts 'ASC', 'DESC'. * @type string $orderby The field to use when ordering the images. Default 'menu_order ID'. * Accepts any valid SQL ORDERBY statement. * @type int $id Post ID. * @type string $itemtag HTML tag to use for each image in the gallery. * Default 'dl', or 'figure' when the theme registers HTML5 gallery support. * @type string $icontag HTML tag to use for each image's icon. * Default 'dt', or 'div' when the theme registers HTML5 gallery support. * @type string $captiontag HTML tag to use for each image's caption. * Default 'dd', or 'figcaption' when the theme registers HTML5 gallery support. * @type int $columns Number of columns of images to display. Default 3. * @type string|array $size Size of the images to display. Accepts any valid image size, or an array of width * and height values in pixels (in that order). Default 'thumbnail'. * @type string $ids A comma-separated list of IDs of attachments to display. Default empty. * @type string $include A comma-separated list of IDs of attachments to include. Default empty. * @type string $exclude A comma-separated list of IDs of attachments to exclude. Default empty. * @type string $link What to link each image to. Default empty (links to the attachment page). * Accepts 'file', 'none'. * } * @return string HTML content to display gallery. */ function gallery_shortcode( $attr ) { $post = get_post(); static $instance = 0; $instance++; if ( ! empty( $attr['ids'] ) ) { // 'ids' is explicitly ordered, unless you specify otherwise. if ( empty( $attr['orderby'] ) ) { $attr['orderby'] = 'post__in'; } $attr['include'] = $attr['ids']; } /** * Filters the default gallery shortcode output. * * If the filtered output isn't empty, it will be used instead of generating * the default gallery template. * * @since 2.5.0 * @since 4.2.0 The `$instance` parameter was added. * * @see gallery_shortcode() * * @param string $output The gallery output. Default empty. * @param array $attr Attributes of the gallery shortcode. * @param int $instance Unique numeric ID of this gallery shortcode instance. */ $output = apply_filters( 'post_gallery', '', $attr, $instance ); if ( ! empty( $output ) ) { return $output; } $html5 = current_theme_supports( 'html5', 'gallery' ); $atts = shortcode_atts( array( 'order' => 'ASC', 'orderby' => 'menu_order ID', 'id' => $post ? $post->ID : 0, 'itemtag' => $html5 ? 'figure' : 'dl', 'icontag' => $html5 ? 'div' : 'dt', 'captiontag' => $html5 ? 'figcaption' : 'dd', 'columns' => 3, 'size' => 'thumbnail', 'include' => '', 'exclude' => '', 'link' => '', ), $attr, 'gallery' ); $id = intval( $atts['id'] ); if ( ! empty( $atts['include'] ) ) { $_attachments = get_posts( array( 'include' => $atts['include'], 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $atts['order'], 'orderby' => $atts['orderby'], ) ); $attachments = array(); foreach ( $_attachments as $key => $val ) { $attachments[ $val->ID ] = $_attachments[ $key ]; } } elseif ( ! empty( $atts['exclude'] ) ) { $attachments = get_children( array( 'post_parent' => $id, 'exclude' => $atts['exclude'], 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $atts['order'], 'orderby' => $atts['orderby'], ) ); } else { $attachments = get_children( array( 'post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $atts['order'], 'orderby' => $atts['orderby'], ) ); } if ( empty( $attachments ) ) { return ''; } if ( is_feed() ) { $output = "\n"; foreach ( $attachments as $att_id => $attachment ) { if ( ! empty( $atts['link'] ) ) { if ( 'none' === $atts['link'] ) { $output .= wp_get_attachment_image( $att_id, $atts['size'], false, $attr ); } else { $output .= wp_get_attachment_link( $att_id, $atts['size'], false ); } } else { $output .= wp_get_attachment_link( $att_id, $atts['size'], true ); } $output .= "\n"; } return $output; } $itemtag = tag_escape( $atts['itemtag'] ); $captiontag = tag_escape( $atts['captiontag'] ); $icontag = tag_escape( $atts['icontag'] ); $valid_tags = wp_kses_allowed_html( 'post' ); if ( ! isset( $valid_tags[ $itemtag ] ) ) { $itemtag = 'dl'; } if ( ! isset( $valid_tags[ $captiontag ] ) ) { $captiontag = 'dd'; } if ( ! isset( $valid_tags[ $icontag ] ) ) { $icontag = 'dt'; } $columns = intval( $atts['columns'] ); $itemwidth = $columns > 0 ? floor( 100 / $columns ) : 100; $float = is_rtl() ? 'right' : 'left'; $selector = "gallery-{$instance}"; $gallery_style = ''; /** * Filters whether to print default gallery styles. * * @since 3.1.0 * * @param bool $print Whether to print default gallery styles. * Defaults to false if the theme supports HTML5 galleries. * Otherwise, defaults to true. */ if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) { $type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"'; $gallery_style = " #{$selector} { margin: auto; } #{$selector} .gallery-item { float: {$float}; margin-top: 10px; text-align: center; width: {$itemwidth}%; } #{$selector} img { border: 2px solid #cfcfcf; } #{$selector} .gallery-caption { margin-left: 0; } /* see gallery_shortcode() in wp-includes/media.php */ \n\t\t"; } $size_class = sanitize_html_class( $atts['size'] ); $gallery_div = "\n"; return $output; } /** * Outputs the templates used by playlists. * * @since 3.9.0 */ function wp_underscore_playlist_templates() { ?> 'audio', 'order' => 'ASC', 'orderby' => 'menu_order ID', 'id' => $post ? $post->ID : 0, 'include' => '', 'exclude' => '', 'style' => 'light', 'tracklist' => true, 'tracknumbers' => true, 'images' => true, 'artists' => true, ), $attr, 'playlist' ); $id = intval( $atts['id'] ); if ( 'audio' !== $atts['type'] ) { $atts['type'] = 'video'; } $args = array( 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => $atts['type'], 'order' => $atts['order'], 'orderby' => $atts['orderby'], ); if ( ! empty( $atts['include'] ) ) { $args['include'] = $atts['include']; $_attachments = get_posts( $args ); $attachments = array(); foreach ( $_attachments as $key => $val ) { $attachments[ $val->ID ] = $_attachments[ $key ]; } } elseif ( ! empty( $atts['exclude'] ) ) { $args['post_parent'] = $id; $args['exclude'] = $atts['exclude']; $attachments = get_children( $args ); } else { $args['post_parent'] = $id; $attachments = get_children( $args ); } if ( empty( $attachments ) ) { return ''; } if ( is_feed() ) { $output = "\n"; foreach ( $attachments as $att_id => $attachment ) { $output .= wp_get_attachment_link( $att_id ) . "\n"; } return $output; } $outer = 22; // Default padding and border of wrapper. $default_width = 640; $default_height = 360; $theme_width = empty( $content_width ) ? $default_width : ( $content_width - $outer ); $theme_height = empty( $content_width ) ? $default_height : round( ( $default_height * $theme_width ) / $default_width ); $data = array( 'type' => $atts['type'], // Don't pass strings to JSON, will be truthy in JS. 'tracklist' => wp_validate_boolean( $atts['tracklist'] ), 'tracknumbers' => wp_validate_boolean( $atts['tracknumbers'] ), 'images' => wp_validate_boolean( $atts['images'] ), 'artists' => wp_validate_boolean( $atts['artists'] ), ); $tracks = array(); foreach ( $attachments as $attachment ) { $url = wp_get_attachment_url( $attachment->ID ); $ftype = wp_check_filetype( $url, wp_get_mime_types() ); $track = array( 'src' => $url, 'type' => $ftype['type'], 'title' => $attachment->post_title, 'caption' => $attachment->post_excerpt, 'description' => $attachment->post_content, ); $track['meta'] = array(); $meta = wp_get_attachment_metadata( $attachment->ID ); if ( ! empty( $meta ) ) { foreach ( wp_get_attachment_id3_keys( $attachment ) as $key => $label ) { if ( ! empty( $meta[ $key ] ) ) { $track['meta'][ $key ] = $meta[ $key ]; } } if ( 'video' === $atts['type'] ) { if ( ! empty( $meta['width'] ) && ! empty( $meta['height'] ) ) { $width = $meta['width']; $height = $meta['height']; $theme_height = round( ( $height * $theme_width ) / $width ); } else { $width = $default_width; $height = $default_height; } $track['dimensions'] = array( 'original' => compact( 'width', 'height' ), 'resized' => array( 'width' => $theme_width, 'height' => $theme_height, ), ); } } if ( $atts['images'] ) { $thumb_id = get_post_thumbnail_id( $attachment->ID ); if ( ! empty( $thumb_id ) ) { list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, 'full' ); $track['image'] = compact( 'src', 'width', 'height' ); list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, 'thumbnail' ); $track['thumb'] = compact( 'src', 'width', 'height' ); } else { $src = wp_mime_type_icon( $attachment->ID ); $width = 48; $height = 64; $track['image'] = compact( 'src', 'width', 'height' ); $track['thumb'] = compact( 'src', 'width', 'height' ); } } $tracks[] = $track; } $data['tracks'] = $tracks; $safe_type = esc_attr( $atts['type'] ); $safe_style = esc_attr( $atts['style'] ); ob_start(); if ( 1 === $instance ) { /** * Prints and enqueues playlist scripts, styles, and JavaScript templates. * * @since 3.9.0 * * @param string $type Type of playlist. Possible values are 'audio' or 'video'. * @param string $style The 'theme' for the playlist. Core provides 'light' and 'dark'. */ do_action( 'wp_playlist_scripts', $atts['type'], $atts['style'] ); } ?>
< controls="controls" preload="none" width=" " >>
%1$s', esc_url( $url ) ), $url ); } /** * Returns a filtered list of supported audio formats. * * @since 3.6.0 * * @return string[] Supported audio formats. */ function wp_get_audio_extensions() { /** * Filters the list of supported audio formats. * * @since 3.6.0 * * @param string[] $extensions An array of supported audio formats. Defaults are * 'mp3', 'ogg', 'flac', 'm4a', 'wav'. */ return apply_filters( 'wp_audio_extensions', array( 'mp3', 'ogg', 'flac', 'm4a', 'wav' ) ); } /** * Returns useful keys to use to lookup data from an attachment's stored metadata. * * @since 3.9.0 * * @param WP_Post $attachment The current attachment, provided for context. * @param string $context Optional. The context. Accepts 'edit', 'display'. Default 'display'. * @return string[] Key/value pairs of field keys to labels. */ function wp_get_attachment_id3_keys( $attachment, $context = 'display' ) { $fields = array( 'artist' => __( 'Artist' ), 'album' => __( 'Album' ), ); if ( 'display' === $context ) { $fields['genre'] = __( 'Genre' ); $fields['year'] = __( 'Year' ); $fields['length_formatted'] = _x( 'Length', 'video or audio' ); } elseif ( 'js' === $context ) { $fields['bitrate'] = __( 'Bitrate' ); $fields['bitrate_mode'] = __( 'Bitrate Mode' ); } /** * Filters the editable list of keys to look up data from an attachment's metadata. * * @since 3.9.0 * * @param array $fields Key/value pairs of field keys to labels. * @param WP_Post $attachment Attachment object. * @param string $context The context. Accepts 'edit', 'display'. Default 'display'. */ return apply_filters( 'wp_get_attachment_id3_keys', $fields, $attachment, $context ); } /** * Builds the Audio shortcode output. * * This implements the functionality of the Audio Shortcode for displaying * WordPress mp3s in a post. * * @since 3.6.0 * * @param array $attr { * Attributes of the audio shortcode. * * @type string $src URL to the source of the audio file. Default empty. * @type string $loop The 'loop' attribute for the `