ReflectionFunction::invoke()

(PHP 5, PHP 7)

Invokes function

说明

publicReflectionFunction::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 likecall_user_func()is.

返回值

Returns the result of the invoked function call.

范例

Example #1ReflectionFunction::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

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

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");
?>