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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1031 | |
| 1032 | $video = reset( $videos ); |
| 1033 | $src = wp_get_attachment_url( $video->ID ); |
| 1034 | if ( empty( $src ) ) |
| 1035 | return; |
| 1036 | |
| 1037 | array_unshift( $default_types, 'src' ); |
| 1038 | } |
| 1039 | |
| 1040 | $library = apply_filters( 'wp_video_shortcode_library', 'mediaelement' ); |
| 1041 | if ( 'mediaelement' === $library && did_action( 'init' ) ) { |
| 1042 | wp_enqueue_style( 'wp-mediaelement' ); |
| 1043 | wp_enqueue_script( 'wp-mediaelement' ); |
| 1044 | } |
| 1045 | |
| 1046 | $atts = array( |
| 1047 | 'class' => apply_filters( 'wp_video_shortcode_class', 'wp-video-shortcode' ), |
| 1048 | 'id' => sprintf( 'video-%d-%d', $post_id, $instances ), |
| 1049 | 'width' => absint( $width ), |