目标是从帖子中获取第一个视频（嵌入或短代码）。因此，我们需要检查帖子内容是否有嵌入视频（由WP支持）或[视频]短代码。单个帖子中可能存在多个视频和嵌入内容。如果找到了，返回第一个，不取决于要匹配的给定模式的顺序，而是取决于它们插入帖子的顺序。
这是我目前的进展。。。
这个返回第一个[视频]短码。是否有一种方法可以让它不仅查找视频短代码，还可以查找嵌入？
function theme_self_hosted_videos() {
global $post;
$pattern = get_shortcode_regex();
if ( preg_match_all( \'/\'. $pattern .\'/s\', $post->post_content, $matches ) && array_key_exists( 2, $matches ) && in_array( \'video\', $matches[2] ) ) {
$videos = $matches[0];
$i = 0;
foreach ($videos as $video ) {
if($i == 0) {
echo do_shortcode($video);
}
$i++;
}
}
return false;
}
add_action( \'wp\', \'theme_self_hosted_videos\' );
这是我目前在返回文章中嵌入的第一个视频函数方面的进展。但并没有按预期工作。显然取决于$pattern\\u数组顺序，也可能取决于模式本身。。。
function theme_oembed_videos() {
global $post;
// Here is a sample array of patterns for supported video embeds from wp-includes/class-wp-embed.php
$pattern_array = array(
\'#https://youtu\\.be/.*#i\',
\'#https://(www\\.)?youtube\\.com/playlist.*#i\',
\'#https://(www\\.)?youtube\\.com/watch.*#i\',
\'#http://(www\\.)?youtube\\.com/watch.*#i\',
\'#http://(www\\.)?youtube\\.com/playlist.*#i\',
\'#http://youtu\\.be/.*#i\',
\'#https?://wordpress.tv/.*#i\',
\'#https?://(.+\\.)?vimeo\\.com/.*#i\'
);
foreach ($pattern_array as $pattern) {
if (preg_match_all($pattern, $post->post_content, $matches)) {
return wp_oembed_get( $matches[0] );
}
return false;
}
}
最合适的回答,由SO网友:bonger 整理而成
您可以尝试将所有模式混合在一个大的regexp或中，然后对内容进行简单的逐行分析：
function theme_oembed_videos() {
global $post;
if ( $post && $post->post_content ) {
global $shortcode_tags;
// Make a copy of global shortcode tags - we\'ll temporarily overwrite it.
$theme_shortcode_tags = $shortcode_tags;
// The shortcodes we\'re interested in.
$shortcode_tags = array(
\'video\' => $theme_shortcode_tags[\'video\'],
\'embed\' => $theme_shortcode_tags[\'embed\']
);
// Get the absurd shortcode regexp.
$video_regex = \'#\' . get_shortcode_regex() . \'#i\';
// Restore global shortcode tags.
$shortcode_tags = $theme_shortcode_tags;
$pattern_array = array( $video_regex );
// Get the patterns from the embed object.
if ( ! function_exists( \'_wp_oembed_get_object\' ) ) {
include ABSPATH . WPINC . \'/class-oembed.php\';
}
$oembed = _wp_oembed_get_object();
$pattern_array = array_merge( $pattern_array, array_keys( $oembed->providers ) );
// Or all the patterns together.
$pattern = \'#(\' . array_reduce( $pattern_array, function ( $carry, $item ) {
if ( strpos( $item, \'#\' ) === 0 ) {
// Assuming \'#...#i\' regexps.
$item = substr( $item, 1, -2 );
} else {
// Assuming glob patterns.
$item = str_replace( \'*\', \'(.+)\', $item );
}
return $carry ? $carry . \')|(\' . $item : $item;
} ) . \')#is\';
// Simplistic parse of content line by line.
$lines = explode( "\\n", $post->post_content );
foreach ( $lines as $line ) {
$line = trim( $line );
if ( preg_match( $pattern, $line, $matches ) ) {
if ( strpos( $matches[0], \'[\' ) === 0 ) {
$ret = do_shortcode( $matches[0] );
} else {
$ret = wp_oembed_get( $matches[0] );
}
return $ret;
}
}
}
}
此外，您可能希望为嵌入使用瞬态-请参阅
this answer 我给了。
SO网友:cybmeta
您可以使用get_media_embedded_in_content() 用于短代码和嵌入媒体的函数（它查找这些HTML标记：音频、视频、对象、嵌入或iframe），只需确保使用应用过滤器和执行短代码的内容即可。
例如：
$post_id = 125;
$post = get_post($post_id);
//Get the content, apply filters and execute shortcodes
$content = apply_filters( \'the_content\', $post->post_content );
$embeds = get_media_embedded_in_content( $content );
//$embeds is an array and each item is the HTML of an embedded media.
//The first item of the array is the first embedded media in the content
$fist_embedded = $embeds[0];
将上述代码添加到类似于您的函数：
function get_first_embed_media($post_id) {
$post = get_post($post_id);
$content = do_shortcode( apply_filters( \'the_content\', $post->post_content ) );
$embeds = get_media_embedded_in_content( $content );
if( !empty($embeds) ) {
//return first embed
return $embeds[0];
} else {
//No embeds found
return false;
}
}
要仅限制视频，您可以执行以下操作：
function get_first_embed_media($post_id) {
$post = get_post($post_id);
$content = do_shortcode( apply_filters( \'the_content\', $post->post_content ) );
$embeds = get_media_embedded_in_content( $content );
if( !empty($embeds) ) {
//check what is the first embed containg video tag, youtube or vimeo
foreach( $embeds as $embed ) {
if( strpos( $embed, \'video\' ) || strpos( $embed, \'youtube\' ) || strpos( $embed, \'vimeo\' ) ) {
return $embed;
}
}
} else {
//No video embedded found
return false;
}
}
Note: There was a bug in get_media_embedded_in_content() that made this answer not working as expected 波纹管WP 4.2。
