ReflectionMethod::invoke

(PHP 5, PHP 7, PHP 8)

ReflectionMethod::invokeInvoke

说明

public ReflectionMethod::invoke(?object $object, mixed ...$args): mixed

执行反射的方法。

参数

object

如果执行的方法是静态类,那么这个参数传送 null

args

0,或者传送给方法的参数列表。可以通过这个参数,给方法传送大量的参数。

返回值

返回方法的返回值

错误/异常

如果 object 并没有包含一个可以使用的类实例,那么将产生 一个 ReflectionException

如果方法调用失败,也会产生一个 ReflectionException

示例

示例 #1 ReflectionMethod::invoke() 示例

<?php
class HelloWorld {

public function
sayHelloTo($name) {
return
'Hello ' . $name;
}

}

$reflectionMethod = new ReflectionMethod('HelloWorld', 'sayHelloTo');
echo
$reflectionMethod->invoke(new HelloWorld(), 'Mike');
?>

以上示例会输出:

Hello Mike

注释

注意:

当需要引用参数时,不能使用 ReflectionMethod::invoke()。必须使用 ReflectionMethod::invokeArgs() 代替(在参数列表传递引用)。

参见

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User Contributed Notes 3 notes

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21
rojaro at gmail dot com
13 years ago
Note: If you want to invoke protected or private methods, you'll first have to make them accessible using the setAccessible() method (see http://php.net/reflectionmethod.setaccessible ).
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8
dimitriy at remerov dot ru
11 years ago
This method can be used to call a overwritten public method of a parent class on an child instance
The following code will output "A":

<?php

class A
{
public function
foo()
{
return
__CLASS__;
}
}

class
B extends A
{
public function
foo()
{
return
__CLASS__;
}
}

$b = new B();

$reflection = new ReflectionObject($b);

$parentReflection = $reflection->getParentClass();

$parentFooReflection = $parentReflection->getMethod('foo');

$data = $parentFooReflection->invoke($b);

echo
$data;

?>
up
0
templargrey at wp dot pl
12 years ago
Seems that Reflection doesn`t resolve late static bindings - var_dump will show "string 'a' (length=1)".

<?php
class ParentClass { protected static $a = 'a'; static public function init() { return static::$a; } }
class
ChildClass extends ParentClass { protected static $a = 'b'; }

$r = new ReflectionClass('ChildClass');
var_dump($r->getMethod('init')->invoke(null));
?>
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