要从文件系统中删除文件，可以使用类似以下内容附加到jQuery调用的AJAX挂钩：

function ajax_remove_image() {
    check_ajax_referer( \'image_removal\', \'image_removal_nonce\' );

    if ( ! $_POST[ \'confirm\' ] )
        exit( \'false\' );

    $uploads       = wp_upload_dir();
    $upload_dir    = $uploads[ \'path\' ];
    $file          = strpos( $_POST[ \'file\' ], \'/\' ) !== false ? $_POST[ \'file\' ] : $upload_dir . \'/\' . $_POST[ \'file\' ];
    $attachment_id = null;

    @unlink( $file );

    if ( ! file_exists( $file ) )
        exit( \'true\' );
    else
        exit( \'false\' );
}