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September 22, 2015 16:20
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Grab a thumbnail for post... If no featured image... Grab the first image in the post content.. Or generate a thumbnail based on youtube video if that is included instead of an image...
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| <?php | |
| function rw_thumb_url($text, $size){ | |
| global $post; | |
| $imageurl = ""; | |
| // Check to see which image is set as "Featured Image" | |
| $featuredimg = get_post_thumbnail_id( $post->ID ); | |
| // Get source for featured image | |
| $img_src = wp_get_attachment_image_src( $featuredimg, $size ); | |
| // Set $imageurl to Featured Image | |
| $imageurl = $img_src[0]; | |
| // If there is no "Featured Image" set, move on and get the first image attached to the post | |
| if ( !$imageurl ) { | |
| // Extract the thumbnail from the first attached imaged | |
| $allimages = get_children( 'post_type=attachment&post_mime_type=image&post_parent=' . $post->ID ); | |
| foreach ( $allimages as $img ) { | |
| $img_src = wp_get_attachment_image_src( $img->ID, $size ); | |
| break; | |
| } | |
| // Set $imageurl to first attached image | |
| $imageurl = $img_src[0]; | |
| } | |
| // If there is no image attached to the post, look for anything that looks like an image and get that | |
| if ( !$imageurl ) { | |
| preg_match( '/<\s*img [^\>]*src\s*=\s*[\""\']?([^\""\'>]*)/i' , $text, $matches ); | |
| $imageurl = $matches[1]; | |
| } | |
| // If there's no image attached or inserted in the post, look for a YouTube video | |
| if ( !$imageur l) { | |
| preg_match( "/([a-zA-Z0-9\-\_]+\.|)youtube\.com\/watch(\?v\=|\/v\/)([a-zA-Z0-9\-\_]{11})([^<\s]*)/", $text, $matches2 ); | |
| $youtubeurl = $matches2[0]; | |
| $videokey = $matches2[3]; | |
| if ( !$youtubeurl ) { | |
| preg_match( "/([a-zA-Z0-9\-\_]+\.|)youtu\.be\/([a-zA-Z0-9\-\_]{11})([^<\s]*)/", $text, $matches2 ); | |
| $youtubeurl = $matches2[0]; | |
| $videokey = $matches2[2]; | |
| } | |
| if ( $youtubeurl ) | |
| $imageurl = "http://i.ytimg.com/vi/{$videokey}/0.jpg"; | |
| } | |
| // Spit out the image path | |
| return $imageurl; | |
| } |
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