# 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.

### 示例

示例 #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');
?>`

以上示例会输出：

    Dr. Phil

### 注释

> 注意:

> 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

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