ReflectionFunction::invoke

(PHP 5, PHP 7, PHP 8)

ReflectionFunction::invoke — Invokes function

说明

public ReflectionFunction::invoke ( mixed ...$args ) : mixed

Invokes a reflected function.

参数

args: The passed in argument list. It accepts a variable number of arguments which are passed to the function much like call_user_func() is.

返回值

Returns the result of the invoked function call.

范例

Example #1 ReflectionFunction::invoke() example


<?php
function title($title, $name)
{
    return sprintf("%s. %s\r\n", $title, $name);
}

$function = new ReflectionFunction('title');

echo $function->invoke('Dr', 'Phil');
?>

以上例程会输出：

Dr. Phil

注释

Note:
ReflectionFunction::invoke() cannot be used when reference parameters are expected. ReflectionFunction::invokeArgs() has to be used instead (passing references in the argument list).

参见

ReflectionFunction::export() - Exports function
__invoke()
call_user_func() - 把第一个参数作为回调函数调用

User Contributed Notes

spark at limao dot com dot br 10-Jun-2011 10:55


I know Reflections classes have a lot of power, but sometimes all we need is to store a annonymus function or even create a simple callback somewhere.



so here it is, the Callback class:

<?php

    class Callback{

        private $name = false;

        

        public function Callback($obj,$call=false){

            $name = array($obj);

            if($call) $name[] = $call;

            

            $this->name = $name;

        }

        public function invoke($params=array()){

            return call_user_func_array($this->name,$params);

        }

    }

?>



Usage:

<?php

    function sayName(){

        return "goku";

    }

    

    $myVar = new Callback("sayName");

    

    echo "Hi, I am ".$myVar->invoke()."!";

    

    //also works with methods: new Callback($obj,"method");

?>