我正在使用以下代码查找第一个嵌入到帖子内容中的YouTube/Vimeo：
function compare_by_offset( $a, $b ) {
return $a['order'] - $b['order'];
}
function first_video_url($post_id = null) {
if ( $post_id == null OR $post_id == '' ) $post_id = get_the_ID();
$post_array = get_post( $post_id );
$markup = $post_array->post_content;
$regexes = array(
'#(?:https?:)?//www'.youtube(?:'-nocookie)?'.com/(?:v|e|embed)/([A-Za-z0-9'-_]+)#', // Comprehensive search for both iFrame and old school embeds
'#(?:https?(?:a|vh?)?://)?(?:www'.)?youtube(?:'-nocookie)?'.com/watch'?.*v=([A-Za-z0-9'-_]+)#', // Any YouTube URL. After http(s) support a or v for Youtube Lyte and v or vh for Smart Youtube plugin
'#(?:https?(?:a|vh?)?://)?youtu'.be/([A-Za-z0-9'-_]+)#', // Any shortened youtu.be URL. After http(s) a or v for Youtube Lyte and v or vh for Smart Youtube plugin
'#<div class="lyte" id="([A-Za-z0-9'-_]+)"#', // YouTube Lyte
'#data-youtube-id="([A-Za-z0-9'-_]+)"#', // LazyYT.js
'#<object[^>]+>.+?http://vimeo'.com/moogaloop.swf'?clip_id=([A-Za-z0-9'-_]+)&.+?</object>#s', // Standard Vimeo embed code
'#(?:https?:)?//player'.vimeo'.com/video/([0-9]+)#', // Vimeo iframe player
'#'[vimeo id=([A-Za-z0-9'-_]+)]#', // JR_embed shortcode
'#'[vimeo clip_id="([A-Za-z0-9'-_]+)"[^>]*]#', // Another shortcode
'#'[vimeo video_id="([A-Za-z0-9'-_]+)"[^>]*]#', // Yet another shortcode
'#(?:https?://)?(?:www'.)?vimeo'.com/([0-9]+)#', // Vimeo URL
'#(?:https?://)?(?:www'.)?vimeo'.com/channels/(?:[A-Za-z0-9]+)/([0-9]+)#' // Channel URL
);
$provider_videos = array();
foreach ( $regexes as $regex ) {
if ( preg_match_all( $regex, $markup, $matches, PREG_OFFSET_CAPTURE ) ) {
$provider_videos = array_merge( $provider_videos, $matches[0] );
}
}
if ( empty( $provider_videos ) ) return;
foreach ( $provider_videos as $video ) {
$videos[] = array(
'url' => $video[0],
'order' => $video[1]
);
}
usort( $videos, 'compare_by_offset' );
$first_video_url = current(array_column($videos, 'url'));
if ( empty( $first_video_url ) ) return;
return $first_video_url;
}
现在，当我得到帖子中第一个视频的链接时，我想将其从帖子内容中删除。这就是我陷入困境的地方。到目前为止我的尝试：
function remove_first_image ($content) {
$url = first_video_url();
$parsed = parse_url($url);
$video_id = $parsed['query'];
$embed_code = wp_oembed_get($url);
$pattern = 'a pattern for that embed which I fail to make';
$content = preg_replace($pattern, '', $content);
return $content;
}
add_filter('the_content', 'remove_first_image');
谢谢！
我想一个人只有提出自己愚蠢的问题才能回答。答案来了：
function remove_first_image ($content) {
if ( is_single() && has_post_format('video') ) {
$url = first_video_url();
$embed_code = wp_oembed_get($url);
$content = str_replace($embed_code, '', $content);
}
return $content;
}
add_filter('the_content', 'remove_first_image');