您可以使用全局$wp_filter 数组以检查每个筛选器上的回调。下面是一个代码片段，它打印出the_content 在主题的页脚部分进行筛选：

add_action(\'wp_footer\',function(){
        global $wp_filter;
        printf(\'<pre>%s</pre>\',print_r( $wp_filter[\'the_content\'],true));
});

   [10] => Array
        (
            [wptexturize] => Array
                (
                    [function] => wptexturize
                    [accepted_args] => 1
                )

            [convert_smilies] => Array
                (
                    [function] => convert_smilies
                    [accepted_args] => 1
                )

            [convert_chars] => Array
                (
                    [function] => convert_chars
                    [accepted_args] => 1
                )

            [wpautop] => Array
                (
                    [function] => wpautop
                    [accepted_args] => 1
                )

            [shortcode_unautop] => Array
                (
                    [function] => shortcode_unautop
                    [accepted_args] => 1
                )

            [prepend_attachment] => Array
                (
                    [function] => prepend_attachment
                    [accepted_args] => 1
                )

        )