ReflectionFunction::invoke
(PHP 5)
ReflectionFunction::invoke — Invokes function
说明
$parameter
[, 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:
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
用户评论:
[#1] spark at limao dot com dot br [2011-06-10 10:55:54]
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");
?>