0 ) $max_width = min( intval($content_width), $max_width ); } // $size == 'full' has no constraint else { $max_width = $width; $max_height = $height; } list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size ); 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 Optional. Width attribute value. * @param int|string $height Optional. Height attribute value. * @return string HTML attributes for width and, or height. */ function image_hwstring($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'). * * Array with image url, width, height, and whether is intermediate size, in * that order is returned on success is returned. $is_intermediate is true if * $url is a resized image, false if it is the original. * * 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 '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 returned in the function. The first element being the URL * to the new image that was resized. * * @since 2.5.0 * @uses apply_filters() Calls 'image_downsize' on $id and $size to provide * resize services. * * @param int $id Attachment ID for image. * @param string $size Optional, default is 'medium'. Size of image, can be 'thumbnail'. * @return bool|array False on failure, array on success. */ function image_downsize($id, $size = 'medium') { if ( !wp_attachment_is_image($id) ) return false; $img_url = wp_get_attachment_url($id); $meta = wp_get_attachment_metadata($id); $width = $height = 0; $is_intermediate = false; // plugins can use this to provide resize services if ( $out = apply_filters('image_downsize', false, $id, $size) ) return $out; // try for a new style intermediate size if ( $intermediate = image_get_intermediate_size($id, $size) ) { $img_url = str_replace(basename($img_url), $intermediate['file'], $img_url); $width = $intermediate['width']; $height = $intermediate['height']; $is_intermediate = true; } elseif ( $size == 'thumbnail' ) { // fall back to the old thumbnail if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) { $img_url = str_replace(basename($img_url), 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; } /** * An tag for an image attachment, scaling it down if requested. * * The filter 'get_image_tag_class' 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 '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 * * @uses apply_filters() The 'get_image_tag_class' filter is the IMG element * class attribute. * @uses apply_filters() The 'get_image_tag' filter is the full IMG element with * all attributes. * * @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 $size Optional. Default is 'medium'. * @return string HTML IMG element for given image attachment */ function get_image_tag($id, $alt, $title, $align, $size='medium') { list( $img_src, $width, $height ) = image_downsize($id, $size); $hwstring = image_hwstring($width, $height); $class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id; $class = apply_filters('get_image_tag_class', $class, $id, $align, $size); $html = '' . esc_attr($alt) . ''; $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); return $html; } /** * Calculates the new dimentions for a downsampled image. * * Same as {@link wp_shrink_dimensions()}, except the max parameters are * optional. 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. Maximum wanted width. * @param int $max_height Optional. Maximum wanted height. * @return array First item is the width, the second item is the height. */ function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) { if ( !$max_width and !$max_height ) return array( $current_width, $current_height ); $width_ratio = $height_ratio = 1.0; if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) $width_ratio = $max_width / $current_width; if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) $height_ratio = $max_height / $current_height; // the smaller ratio is the one we need to fit it to the constraining box $ratio = min( $width_ratio, $height_ratio ); return array( intval($current_width * $ratio), intval($current_height * $ratio) ); } /** * Retrieve calculated resized dimensions for use in imagecopyresampled(). * * Calculate dimensions and coordinates for a resized image that fits within a * specified width and height. If $crop is true, the largest matching central * portion of the image will be cropped out and resized to the required size. * * @since 2.5.0 * * @param int $orig_w Original width. * @param int $orig_h Original height. * @param int $dest_w New width. * @param int $dest_h New height. * @param bool $crop Optional, default is false. Whether to crop image or resize. * @return bool|array False, on failure. Returned array matches parameters for imagecopyresampled() PHP function. */ function image_resize_dimensions($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; if ( $crop ) { // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h $aspect_ratio = $orig_w / $orig_h; $new_w = min($dest_w, $orig_w); $new_h = min($dest_h, $orig_h); if (!$new_w) { $new_w = intval($new_h * $aspect_ratio); } if (!$new_h) { $new_h = intval($new_w / $aspect_ratio); } $size_ratio = max($new_w / $orig_w, $new_h / $orig_h); $crop_w = ceil($new_w / $size_ratio); $crop_h = ceil($new_h / $size_ratio); $s_x = floor(($orig_w - $crop_w)/2); $s_y = floor(($orig_h - $crop_h)/2); } else { // don't crop, just 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, $dest_h ); } // if the resulting image would be the same size or larger we don't want to resize it if ($new_w >= $orig_w && $new_h >= $orig_h) 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, $s_x, $s_y, $new_w, $new_h, $crop_w, $crop_h); } /** * Scale down an image to fit a particular size and save a new copy of the image. * * The PNG transparency will be preserved using the function, as well as the * image type. If the file going in is PNG, then the resized image is going to * be PNG. The only supported image types are PNG, GIF, and JPEG. * * Some functionality requires API to exist, so some PHP version may lose out * support. This is not the fault of WordPress (where functionality is * downgraded, not actual defects), but of your PHP version. * * @since 2.5.0 * * @param string $file Image file path. * @param int $max_w Maximum width to resize to. * @param int $max_h Maximum height to resize to. * @param bool $crop Optional. Whether to crop image or resize. * @param string $suffix Optional. File Suffix. * @param string $dest_path Optional. New image file path. * @param int $jpeg_quality Optional, default is 90. Image quality percentage. * @return mixed WP_Error on failure. String with new destination path. Array of dimensions from {@link image_resize_dimensions()} */ function image_resize( $file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90 ) { $image = wp_load_image( $file ); if ( !is_resource( $image ) ) return new WP_Error('error_loading_image', $image); $size = @getimagesize( $file ); if ( !$size ) return new WP_Error('invalid_image', __('Could not read image size'), $file); list($orig_w, $orig_h, $orig_type) = $size; $dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop); if ( !$dims ) return $dims; list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims; $newimage = imagecreatetruecolor( $dst_w, $dst_h); // preserve PNG transparency if ( IMAGETYPE_PNG == $orig_type && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) { imagealphablending( $newimage, false); imagesavealpha( $newimage, true); } imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h); // convert from full colors to index colors, like original PNG. if ( IMAGETYPE_PNG == $orig_type && !imageistruecolor( $image ) ) imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) ); // we don't need the original in memory anymore imagedestroy( $image ); // $suffix will be appended to the destination filename, just before the extension if ( !$suffix ) $suffix = "{$dst_w}x{$dst_h}"; $info = pathinfo($file); $dir = $info['dirname']; $ext = $info['extension']; $name = basename($file, ".{$ext}"); if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) ) $dir = $_dest_path; $destfilename = "{$dir}/{$name}-{$suffix}.{$ext}"; if ( IMAGETYPE_GIF == $orig_type ) { if ( !imagegif( $newimage, $destfilename ) ) return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); } elseif ( IMAGETYPE_PNG == $orig_type ) { if (!imagepng( $newimage, $destfilename ) ) return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); } else { $rotated = false; if ( IMAGETYPE_JPEG == $orig_type && function_exists('exif_read_data') ) { // rotate if EXIF 'Orientation' is set $exif = exif_read_data($file, null, true); if ( $exif && isset($exif['IFD0']) && is_array($exif['IFD0']) && isset($exif['IFD0']['Orientation']) ) { if ( 6 == $exif['IFD0']['Orientation'] ) $rotated = rotate_image($newimage, 90); elseif ( 8 == $exif['IFD0']['Orientation'] ) $rotated = rotate_image($newimage, 270); } } // all other formats are converted to jpg $destfilename = "{$dir}/{$name}-{$suffix}.jpg"; if ( $rotated ) { $return = imagejpeg( $rotated, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ); imagedestroy($rotated); } else { $return = imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ); } if ( !$return ) return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); } imagedestroy( $newimage ); // Set correct file permissions $stat = stat( dirname( $destfilename )); $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits @ chmod( $destfilename, $perms ); return $destfilename; } /** * Resize an image to make a thumbnail or intermediate size. * * The returned array has the file size, the image width, and image height. The * filter 'image_make_intermediate_size' 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 $crop Optional, default is false. Whether to crop image to specified height and width or resize. * @return bool|array False, if no image was created. Metadata array on success. */ function image_make_intermediate_size($file, $width, $height, $crop=false) { if ( $width || $height ) { $resized_file = image_resize($file, $width, $height, $crop); if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) { $resized_file = apply_filters('image_make_intermediate_size', $resized_file); return array( 'file' => basename( $resized_file ), 'width' => $info[0], 'height' => $info[1], ); } } return false; } /** * Retrieve 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. * * @since 2.5.0 * * @param int $post_id Attachment ID for image. * @param array|string $size Optional, default is 'thumbnail'. Size of image, either array or string. * @return bool|array False on failure or array of file path, width, and height on success. */ function image_get_intermediate_size($post_id, $size='thumbnail') { if ( !is_array( $imagedata = wp_get_attachment_metadata( $post_id ) ) ) return false; // get the best one for a specified set of dimensions if ( is_array($size) && !empty($imagedata['sizes']) ) { foreach ( $imagedata['sizes'] as $_size => $data ) { // already cropped to width or height; so use this size if ( ( $data['width'] == $size[0] && $data['height'] <= $size[1] ) || ( $data['height'] == $size[1] && $data['width'] <= $size[0] ) ) { $file = $data['file']; list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size ); return compact( 'file', 'width', 'height' ); } // add to lookup table: area => size $areas[$data['width'] * $data['height']] = $_size; } if ( !$size || !empty($areas) ) { // find for the smallest image not smaller than the desired size ksort($areas); foreach ( $areas as $_size ) { $data = $imagedata['sizes'][$_size]; if ( $data['width'] >= $size[0] || $data['height'] >= $size[1] ) { $file = $data['file']; list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size ); return compact( 'file', 'width', 'height' ); } } } } if ( is_array($size) || empty($size) || empty($imagedata['sizes'][$size]) ) return false; $data = $imagedata['sizes'][$size]; // include the full filesystem path of the intermediate file if ( empty($data['path']) && !empty($data['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'] ); } return $data; } /** * Retrieve an image to represent an attachment. * * A mime icon for files, thumbnail or intermediate size for images. * * @since 2.5.0 * * @param int $attachment_id Image attachment ID. * @param string $size Optional, default is 'thumbnail'. * @param bool $icon Optional, default is false. Whether it is an icon. * @return bool|array Returns an array (url, width, height), or false, if no image is available. */ function wp_get_attachment_image_src($attachment_id, $size='thumbnail', $icon = false) { // get a thumbnail or intermediate image if there is one if ( $image = image_downsize($attachment_id, $size) ) return $image; $src = false; if ( $icon && $src = wp_mime_type_icon($attachment_id) ) { $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' ); $src_file = $icon_dir . '/' . basename($src); @list($width, $height) = getimagesize($src_file); } if ( $src && $width && $height ) return array( $src, $width, $height ); return false; } /** * Get an HTML img element representing an image attachment * * @uses apply_filters() Calls 'wp_get_attachment_image_attributes' hook on attributes array * @uses wp_get_attachment_image_src() Gets attachment file URL and dimensions * @since 2.5.0 * * @param int $attachment_id Image attachment ID. * @param string $size Optional, default is 'thumbnail'. * @param bool $icon Optional, default is false. Whether it is an icon. * @return string HTML img element or empty string on failure. */ function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = false) { $html = ''; $image = wp_get_attachment_image_src($attachment_id, $size, $icon); if ( $image ) { list($src, $width, $height) = $image; $hwstring = image_hwstring($width, $height); if ( is_array($size) ) $size = join('x', $size); $attachment =& get_post($attachment_id); $attr = array( 'src' => $src, 'class' => "attachment-$size", 'alt' => trim(strip_tags( $attachment->post_excerpt )), 'title' => trim(strip_tags( $attachment->post_title )), ); $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment ); $attr = array_map( 'esc_attr', $attr ); $html = rtrim(" $value ) { $html .= " $name=" . '"' . $value . '"'; } $html .= ' />'; } return $html; } add_shortcode('wp_caption', 'img_caption_shortcode'); add_shortcode('caption', 'img_caption_shortcode'); /** * The Caption shortcode. * * Allows a plugin to replace the content that would otherwise be returned. The * filter is 'img_caption_shortcode' and passes an empty string, the attr * parameter and the content parameter values. * * The supported attributes for the shortcode are 'id', 'align', 'width', and * 'caption'. * * @since 2.6.0 * * @param array $attr Attributes attributed to the shortcode. * @param string $content Optional. Shortcode content. * @return string */ function img_caption_shortcode($attr, $content = null) { // Allow plugins/themes to override the default caption template. $output = apply_filters('img_caption_shortcode', '', $attr, $content); if ( $output != '' ) return $output; extract(shortcode_atts(array( 'id' => '', 'align' => 'alignnone', 'width' => '', 'caption' => '' ), $attr)); if ( 1 > (int) $width || empty($caption) ) return $content; if ( $id ) $id = 'id="' . esc_attr($id) . '" '; return '
' . do_shortcode( $content ) . '

' . $caption . '

'; } add_shortcode('gallery', 'gallery_shortcode'); /** * The Gallery shortcode. * * This implements the functionality of the Gallery Shortcode for displaying * WordPress images on a post. * * @since 2.5.0 * * @param array $attr Attributes attributed to the shortcode. * @return string HTML content to display gallery. */ function gallery_shortcode($attr) { global $post; static $instance = 0; $instance++; // Allow plugins/themes to override the default gallery template. $output = apply_filters('post_gallery', '', $attr); if ( $output != '' ) return $output; // We're trusting author input, so let's at least make sure it looks like a valid orderby statement if ( isset( $attr['orderby'] ) ) { $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] ); if ( !$attr['orderby'] ) unset( $attr['orderby'] ); } extract(shortcode_atts(array( 'order' => 'ASC', 'orderby' => 'menu_order ID', 'id' => $post->ID, 'itemtag' => 'dl', 'icontag' => 'dt', 'captiontag' => 'dd', 'columns' => 3, 'size' => 'thumbnail', 'include' => '', 'exclude' => '' ), $attr)); $id = intval($id); if ( 'RAND' == $order ) $orderby = 'none'; if ( !empty($include) ) { $include = preg_replace( '/[^0-9,]+/', '', $include ); $_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); $attachments = array(); foreach ( $_attachments as $key => $val ) { $attachments[$val->ID] = $_attachments[$key]; } } elseif ( !empty($exclude) ) { $exclude = preg_replace( '/[^0-9,]+/', '', $exclude ); $attachments = get_children( array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); } else { $attachments = get_children( array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) ); } if ( empty($attachments) ) return ''; if ( is_feed() ) { $output = "\n"; foreach ( $attachments as $att_id => $attachment ) $output .= wp_get_attachment_link($att_id, $size, true) . "\n"; return $output; } $itemtag = tag_escape($itemtag); $captiontag = tag_escape($captiontag); $columns = intval($columns); $itemwidth = $columns > 0 ? floor(100/$columns) : 100; $selector = "gallery-{$instance}"; $output = apply_filters('gallery_style', " \n"; return $output; } /** * Display previous image link that has the same post parent. * * @since 2.5.0 * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text; * @param string $text Optional, default is false. If included, link will reflect $text variable. * @return string HTML content. */ function previous_image_link($size = 'thumbnail', $text = false) { adjacent_image_link(true, $size, $text); } /** * Display next image link that has the same post parent. * * @since 2.5.0 * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text; * @param string $text Optional, default is false. If included, link will reflect $text variable. * @return string HTML content. */ function next_image_link($size = 'thumbnail', $text = false) { adjacent_image_link(false, $size, $text); } /** * Display next or previous image link that has the same post parent. * * Retrieves the current attachment object from the $post global. * * @since 2.5.0 * * @param bool $prev Optional. Default is true to display previous link, true for next. */ function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) { global $post; $post = get_post($post); $attachments = array_values(get_children( array('post_parent' => $post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') )); foreach ( $attachments as $k => $attachment ) if ( $attachment->ID == $post->ID ) break; $k = $prev ? $k - 1 : $k + 1; if ( isset($attachments[$k]) ) echo wp_get_attachment_link($attachments[$k]->ID, $size, true, false, $text); } /** * Retrieve taxonomies attached to the attachment. * * @since 2.5.0 * * @param int|array|object $attachment Attachment ID, Attachment data array, or Attachment data object. * @return array Empty array on failure. List of taxonomies on success. */ function get_attachment_taxonomies($attachment) { if ( is_int( $attachment ) ) $attachment = get_post($attachment); else if ( is_array($attachment) ) $attachment = (object) $attachment; if ( ! is_object($attachment) ) return array(); $filename = basename($attachment->guid); $objects = array('attachment'); if ( false !== strpos($filename, '.') ) $objects[] = 'attachment:' . substr($filename, strrpos($filename, '.') + 1); if ( !empty($attachment->post_mime_type) ) { $objects[] = 'attachment:' . $attachment->post_mime_type; if ( false !== strpos($attachment->post_mime_type, '/') ) foreach ( explode('/', $attachment->post_mime_type) as $token ) if ( !empty($token) ) $objects[] = "attachment:$token"; } $taxonomies = array(); foreach ( $objects as $object ) if ( $taxes = get_object_taxonomies($object) ) $taxonomies = array_merge($taxonomies, $taxes); return array_unique($taxonomies); } /** * Rotate an image. * * @since 2.9.0 * * @param resource $src_img GD image handle of source image. * @param $angle int clockwise angle of rotation, only 90, 180 and 270 are supported. * @param $keep_transparency bool preserve transparency. * @return mixed GD image handle of rotated image or false on error. */ function rotate_image( $src_img, $angle, $keep_transparency = false ) { if ( function_exists('imagerotate') ) return imagerotate($src_img, 360 - $angle, 0); // imagerotate() rotates CCW if ( 180 == $angle ) return flip_image( $src_img, 'both', $keep_transparency ); $width = imagesx( $src_img ); $height = imagesy( $src_img ); $dest_img = imagecreatetruecolor( $height, $width ); if ( $keep_transparency ) { imagealphablending($dest_img, false); imagesavealpha($dest_img, true); } if ( 90 == $angle ) { for( $x = 0; $x < $width; $x++ ) { for( $y = 0; $y < $height; $y++ ) { if ( !imagecopy($dest_img, $src_img, $height - $y - 1, $x, $x, $y, 1, 1) ) return false; } } } elseif ( 270 == $angle ) { for( $x = 0; $x < $width; $x++ ) { for( $y = 0; $y < $height; $y++ ) { if ( !imagecopy($dest_img, $src_img, $y, $width - $x - 1, $x, $y, 1, 1) ) return false; } } } else { return false; } return $dest_img; } /** * Flip an image. * * @since 2.9.0 * * @param resource $src_img GD image handle of source image. * @param $mode string 'horizontal', 'vertical' or 'both'. * @param $keep_transparency bool preserve transparency. * @return mixed GD image handle of flipped image or false on error. */ function flip_image( $src_img, $mode, $keep_transparency = false ) { $width = $src_width = imagesx( $src_img ); $height = $src_height = imagesy( $src_img ); $src_x = $src_y = 0; switch ( $mode ) { case 'vertical': $src_y = $height -1; $src_height = -$height; break; case 'horizontal': $src_x = $width -1; $src_width = -$width; break; case 'both': if ( function_exists('imagerotate') ) return imagerotate($src_img, 180, 0); $src_x = $width -1; $src_y = $height -1; $src_width = -$width; $src_height = -$height; break; default: return false; } $dest_img = imagecreatetruecolor( $width, $height ); if ( $keep_transparency ) { imagealphablending($dest_img, false); imagesavealpha($dest_img, true); } if ( imagecopyresampled( $dest_img, $src_img, 0, 0, $src_x, $src_y , $width, $height, $src_width, $src_height ) ) return $dest_img; return false; }