WordPress 修改后台编辑器上传视频的[video]短代码为video标签

WordPress 后台编辑器上传视频的时候是以video短代码返回到内容里的，这样子有些小程序没法识别，所以需要把短代码改成video标签。

将以下代码加入到主题的functions.php里：

remove_shortcode( 'video', 'wp_video_shortcode' );  add_shortcode( 'video', 'MBT_video_shortcode' );  function MBT_video_shortcode( $attr, $content = '' ) {  global $content_width;  $post_id = get_post() ? get_the_ID() : 0;    static $instance = 0;  $instance++;  $override = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instance );  if ( '' !== $override ) {  return $override;  }    $video = null;    $default_types = wp_get_video_extensions();  $defaults_atts = array(  'src' => '',  'poster' => '',  'loop' => '',  'autoplay' => '',  'preload' => 'metadata',  'width' => 640,  'height' => 360,  //'class' => 'wp-video-shortcode',  );    foreach ( $default_types as $type ) {  $defaults_atts[$type] = '';  }    $atts = shortcode_atts( $defaults_atts, $attr, 'video' );    if ( is_admin() ) {  if ( $atts['width'] > $defaults_atts['width'] ) {  $atts['height'] = round( ( $atts['height'] * $defaults_atts['width'] ) / $atts['width'] );  $atts['width'] = $defaults_atts['width'];  }  } else {  if ( ! empty( $content_width ) && $atts['width'] > $content_width ) {  $atts['height'] = round( ( $atts['height'] * $content_width ) / $atts['width'] );  $atts['width'] = $content_width;  }  }    $is_vimeo = $is_youtube = false;  $yt_pattern = '#^https?://(?:www.)?(?:youtube.com/watch|youtu.be/)#';  $vimeo_pattern = '#^https?://(.+.)?vimeo.com/.*#';    $primary = false;  if ( ! empty( $atts['src'] ) ) {  $is_vimeo = ( preg_match( $vimeo_pattern, $atts['src'] ) );  $is_youtube = ( preg_match( $yt_pattern, $atts['src'] ) );  if ( ! $is_youtube && ! $is_vimeo ) {  $type = wp_check_filetype( $atts['src'], wp_get_mime_types() );  if ( ! in_array( strtolower( $type['ext'] ), $default_types ) ) {  return sprintf( '<a class="wp-embedded-video" href="%s">%s</a>', esc_url( $atts['src'] ), esc_html( $atts['src'] ) );  }  }    if ( $is_vimeo ) {  wp_enqueue_script( 'mediaelement-vimeo' );  }    $primary = true;  array_unshift( $default_types, 'src' );  } else {  foreach ( $default_types as $ext ) {  if ( ! empty( $atts[ $ext ] ) ) {  $type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );  if ( strtolower( $type['ext'] ) === $ext ) {  $primary = true;  }  }  }  }    if ( ! $primary ) {  $videos = get_attached_media( 'video', $post_id );  if ( empty( $videos ) ) {  return;  }    $video = reset( $videos );  $atts['src'] = wp_get_attachment_url( $video->ID );  if ( empty( $atts['src'] ) ) {  return;  }    array_unshift( $default_types, 'src' );  }    $library = apply_filters( 'wp_video_shortcode_library', 'mediaelement' );  if ( 'mediaelement' === $library && did_action( 'init' ) ) {  wp_enqueue_style( 'wp-mediaelement' );  wp_enqueue_script( 'wp-mediaelement' );  wp_enqueue_script( 'mediaelement-vimeo' );  }    if ( 'mediaelement' === $library ) {  if ( $is_youtube ) {  $atts['src'] = remove_query_arg( 'feature', $atts['src'] );  $atts['src'] = set_url_scheme( $atts['src'], 'https' );  } elseif ( $is_vimeo ) {  $parsed_vimeo_url = wp_parse_url( $atts['src'] );  $vimeo_src = 'https://' . $parsed_vimeo_url['host'] . $parsed_vimeo_url['path'];    $loop = $atts['loop'] ? '1' : '0';  $atts['src'] = add_query_arg( 'loop', $loop, $vimeo_src );  }  }    $atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'], $atts );    $html_atts = array(  //'class' => $atts['class'],  //'id' => sprintf( 'video-%d-%d', $post_id, $instance ),  //'width' => absint( $atts['width'] ),  //'height' => absint( $atts['height'] ),  'poster' => esc_url( $atts['poster'] ),  'loop' => wp_validate_boolean( $atts['loop'] ),  'autoplay' => wp_validate_boolean( $atts['autoplay'] ),  //'preload' => $atts['preload'],  );    foreach ( array( 'poster', 'loop', 'autoplay', 'preload' ) as $a ) {  if ( empty( $html_atts[$a] ) ) {  unset( $html_atts[$a] );  }  }    $attr_strings = array();  foreach ( $html_atts as $k => $v ) {  $attr_strings[] = $k . '="' . esc_attr( $v ) . '"';  }    $html = '';  $fileurl = '';  foreach ( $default_types as $fallback ) {  if ( ! empty( $atts[ $fallback ] ) ) {  if ( empty( $fileurl ) ) {  $fileurl = $atts[ $fallback ];  }  if ( 'src' === $fallback && $is_youtube ) {  $type = array( 'type' => 'video/youtube' );  } elseif ( 'src' === $fallback && $is_vimeo ) {  $type = array( 'type' => 'video/vimeo' );  } else {  $type = wp_check_filetype( $atts[ $fallback ], wp_get_mime_types() );  }  $url = add_query_arg( '_', $instance, $atts[ $fallback ] );  }  }    $html .= sprintf( '<video %s src="'.esc_url( $url ).'" controls="controls">', join( ' ', $attr_strings ) );    $html .= '</video>';    $width_rule = '';  if ( ! empty( $atts['width'] ) ) {  $width_rule = sprintf( 'width: %dpx;', $atts['width'] );  }  //$output = sprintf( '<div style="%s" class="wp-video">%s</div>', $width_rule, $html );  $output = $html;    return apply_filters( 'MBT_video_shortcode', $output, $atts, $video, $post_id, $library );  }

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