问是否可以在php中向任何函数添加回调？

EN

function my_json_encode($data) {
    if (function_exists("json_encode_pre_callback")) {
        json_encode_pre_callback();
    }
    $return = json_encode($data);
    if (function_exists("json_encode_post_callback")) {
        json_encode_post_callback($return);
    }
    return $return;
}

function my_json_encode($data, $pre = null, $post = null) {
    if (is_callable($pre)) {
        $pre();
    }
    $return = json_encode($data);
    if (is_callable($post)) {
        $post($return);
    }
    return $return;
}

my_json_encode(
    $data,
    function(){echo "doing encode";},
    function($d){echo "done encode, value 1 is $d[1]";}
)