我解开钩子wp_underscore_playlist_templates() 函数并创建我自己的版本prefix_wp_underscore_playlist_templates()

您应该首先返回或还原默认播放列表模板。（即钩回至wp_underscore_playlist_templates().)

添加然后将其添加到主题的主要功能中的某个位置。php文件：

add_action( \'wp_playlist_scripts\', function(){
    ?>
<script>
jQuery( function( $ ){
    // Add the search box.
    $( \'.wp-playlist\' ).prepend(
        \'<p class="wp-playlist-custom-search alignright">\' +
            \'<input class="search-playlist" placeholder="Search" />\' +
        \'</p>\' +
        \'<div style="clear: both;"></div>\'
    );

    // Performs the search.
    $( \'.search-playlist\', \'.wp-playlist\' ).on( \'keyup\', function( e ){
        var $playlist = $( this ).closest( \'.wp-playlist\' ),
            query = this.value;

        if ( ! query ) {
            $( \'.wp-playlist-item\', $playlist ).show();
            return;
        } else if ( e.key.length > 1 ) {
            return;
        }

        $( \'.wp-playlist-item-title\', $playlist ).each( function(){
            var re = new RegExp( \'(\' + query + \')\', \'ig\' ),
                title = $( this ).text();

            if ( re.test( title ) ) {
                $( this ).closest( \'.wp-playlist-item\' ).show();
            } else {
                $( this ).closest( \'.wp-playlist-item\' ).hide();
            }
        } );
    } );
} );
</script>
    <?php
} );