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Add functions to extract images from posts in various forms 

props wonderboymusic. fixes #22960

git-svn-id: http://core.svn.wordpress.org/trunk@23772 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Mark Jaquith 2013-03-22 05:20:38 +00:00
parent 3558fe7382
commit 6966294e55
1 changed files with 231 additions and 4 deletions
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235
wp-includes/media.php
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@ -874,7 +874,7 @@ function wp_audio_shortcode( $attr ) {
}
if ( ! $primary ) {
$audios = get_post_audio( $post_id );
$audios = get_attached_audio( $post_id );
if ( empty( $audios ) )
return;
@ -981,7 +981,7 @@ function wp_video_shortcode( $attr ) {
}
if ( ! $primary ) {
$videos = get_post_video( $post_id );
$videos = get_attached_video( $post_id );
if ( empty( $videos ) )
return;
@ -1781,7 +1781,7 @@ function wp_enqueue_media( $args = array() ) {
* @param int $post_id Post ID
* @return array Found audio attachments
*/
function get_post_audio( $post_id = 0 ) {
function get_attached_audio( $post_id = 0 ) {
$post = empty( $post_id ) ? get_post() : get_post( $post_id );
if ( empty( $post ) )
return;
@ -1805,7 +1805,7 @@ function get_post_audio( $post_id = 0 ) {
* @param int $post_id Post ID
* @return array Found video attachments
*/
function get_post_video( $post_id = 0 ) {
function get_attached_video( $post_id = 0 ) {
$post = empty( $post_id ) ? get_post() : get_post( $post_id );
if ( empty( $post ) )
return;
@ -1824,6 +1824,8 @@ function get_post_video( $post_id = 0 ) {
/**
* Audio embed handler callback.
*
* @since 3.6.0
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
@ -1841,6 +1843,8 @@ wp_embed_register_handler( 'wp_audio_embed', '#https?://.+?\.(' . join( '|', wp_
/**
* Video embed handler callback.
*
* @since 3.6.0
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
@ -1860,3 +1864,226 @@ function wp_video_embed( $matches, $attr, $url, $rawattr ) {
return apply_filters( 'wp_video_embed', $video, $attr, $url, $rawattr );
}
wp_embed_register_handler( 'wp_video_embed', '#https?://.+?\.(' . join( '|', wp_get_video_extensions() ) . ')#i', apply_filters( 'wp_video_embed_handler', 'wp_video_embed' ), 9999 );
/**
* Retrieve images attached to the passed post
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array Found image attachments
*/
function get_attached_images( $post_id = 0 ) {
$post = empty( $post_id ) ? get_post() : get_post( $post_id );
if ( empty( $post ) )
return array();
$children = get_children( array(
'post_parent' => $post->ID,
'post_type' => 'attachment',
'post_mime_type' => 'image',
'posts_per_page' => -1,
'orderby' => 'menu_order',
'order' => 'ASC'
) );
if ( ! empty( $children ) )
return $children;
return array();
}
/**
* Retrieve images attached to the passed post
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array Found image attachments
*/
function get_attached_image_srcs( $post_id = 0 ) {
$children = get_attached_images( $post_id );
if ( empty( $children ) )
return array();
$srcs = array();
foreach ( $children as $attachment )
$srcs[] = wp_get_attachment_url( $attachment->ID );
return $srcs;
}
/**
* Check the content blob for image srcs
*
* @since 3.6.0
*
* @param string $content A string which might contain image data.
* @param boolean $remove Whether to remove the found data from the passed content.
* @param int $limit Optional. The number of image srcs to return
* @return array The found image srcs
*/
function get_content_images( &$content, $remove = false, $limit = 0 ) {
$src = '';
$srcs = array();
$matches = array();
if ( $remove && preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches, PREG_SET_ORDER ) && ! empty( $matches ) ) {
$captions = array();
foreach ( $matches as $shortcode ) {
if ( 'caption' === $shortcode[2] )
$captions[] = $shortcode[0];
}
}
if ( preg_match_all( '#<img[^>]+/?>#i', $content, $matches, PREG_SET_ORDER ) && ! empty( $matches ) ) {
foreach ( $matches as $tag ) {
$count = 1;
if ( $remove ) {
foreach ( $captions as $caption ) {
if ( strstr( $caption, $tag[0] ) ) {
$content = str_replace( $caption, '', $content, $count );
}
}
$content = str_replace( $tag[0], '', $content, $count );
}
preg_match( '#src=[\'"](.+?)[\'"]#is', $tag[0], $src );
if ( ! empty( $src[1] ) ) {
$srcs[] = $src[1];
if ( $limit > 0 && count( $srcs ) >= $limit )
break;
}
}
}
return array_values( array_unique( $srcs ) );
}
/**
* Check the content blob for image srcs and return the first
*
* @since 3.6.0
*
* @param string $content A string which might contain image data.
* @param boolean $remove Whether to remove the found data from the passed content.
* @return string The found data
*/
function get_content_image( &$content, $remove = false ) {
$srcs = get_content_images( $content, $remove, 1 );
if ( empty( $srcs ) )
return '';
return reset( $srcs );
}
/**
* Check the content blob for galleries and return their image srcs
*
* @since 3.6.0
*
* @param string $content A string which might contain image data.
* @param boolean $remove Optional. Whether to remove the found data from the passed content.
* @param int $limit Optional. The number of galleries to return
* @return array A list of galleries, which in turn are a list of their srcs in order
*/
function get_content_galleries( &$content, $remove = false, $limit = 0 ) {
$src = '';
$galleries = array();
$matches = array();
if ( preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches, PREG_SET_ORDER ) && ! empty( $matches ) ) {
foreach ( $matches as $shortcode ) {
if ( 'gallery' === $shortcode[2] ) {
$srcs = array();
$count = 1;
if ( $remove )
$content = str_replace( $shortcode[0], '', $content, $count );
$data = shortcode_parse_atts( $shortcode[3] );
$gallery = do_shortcode_tag( $shortcode );
preg_match_all( '#src=[\'"](.+?)[\'"]#is', $gallery, $src, PREG_SET_ORDER );
if ( ! empty( $src ) ) {
foreach ( $src as $s )
$srcs[] = $s[1];
}
$data['src'] = array_values( array_unique( $srcs ) );
$galleries[] = $data;
if ( $limit > 0 && count( $galleries ) >= $limit )
break;
}
}
}
return $galleries;
}
/**
* Retrieve galleries from the passed post's content
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array A list of arrays, each containing gallery data and srcs parsed
* from the expanded shortcode
*/
function get_post_galleries( $post_id = 0 ) {
$post = empty( $post_id ) ? clone get_post() : get_post( $post_id );
if ( empty( $post ) || ! has_shortcode( $post->post_content, 'gallery' ) )
return array();
return get_content_galleries( $post->post_content );
}
/**
* Retrieve the image srcs from galleries from a post's content, if present
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array A list of lists, each containing image srcs parsed
* from an expanded shortcode
*/
function get_post_galleries_images( $post_id = 0 ) {
$post = empty( $post_id ) ? clone get_post() : get_post( $post_id );
if ( empty( $post ) || ! has_shortcode( $post->post_content, 'gallery' ) )
return array();
$data = get_content_galleries( $post->post_content );
return wp_list_pluck( $data, 'src' );
}
/**
* Check a specified post's content for gallery and, if present, return the first
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array Gallery data and srcs parsed from the expanded shortcode
*/
function get_post_gallery( $post_id = 0 ) {
$post = empty( $post_id ) ? clone get_post() : get_post( $post_id );
if ( empty( $post ) || ! has_shortcode( $post->post_content, 'gallery' ) )
return array();
$data = get_content_galleries( $post->post_content, false, 1 );
return reset( $data );
}
/**
* Check a post's content for galleries and return the image srcs for the first found gallery
*
* @since 3.6.0
*
* @param int $post_id Optional. Post ID.
* @return array A list of a gallery's image srcs in order
*/
function get_post_gallery_images( $post_id = 0 ) {
$gallery = get_post_gallery( $post_id );
if ( empty( $gallery['src'] ) )
return array();
return $gallery['src'];
}