ReflectionFunction::invoke

(PHP 5, PHP 7)

ReflectionFunction::invoke — Invokes function

说明

public ReflectionFunction::invoke ([ mixed $... ] ) : mixed

Invokes a reflected function.

参数

...

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:

如果函数有参数需为引用，那么它们必须以引用方式传入。

参见

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");
?>