# ReflectionFunctionAbstract::getClosureCalledClass

(PHP 8 >= 8.0.23, PHP 8 >= 8.1.11)

ReflectionFunctionAbstract::getClosureCalledClass — Returns the class corresponding to static:: inside a closure

### 说明

public ReflectionFunctionAbstract::getClosureCalledClass(): ?ReflectionClass

Returns the class as a ReflectionClass that corresponds to resolving the class name corresponding to `static::` inside the Closure.

### 参数

此函数没有参数。

### 返回值

Returns a ReflectionClass corresponding to the class represented by `static::` in the Closure. If the function is not a closure or if it has global scope `null` is returned instead.

### 示例

示例 #1 Example showcasing difference between ReflectionFunctionAbstract::getClosureCalledClass(), ReflectionFunctionAbstract::getClosureScopeClass(), and ReflectionFunctionAbstract::getClosureThis() with a closure in the object context

`<?php
class A
{
public function getClosure()
{
var_dump(self::class, static::class);
return function() {};
}
}
class B extends A {}
$b = new B();
$c = $b->getClosure();
$r = new ReflectionFunction($c);
var_dump($r->getClosureThis()); // $this === $b, since a non-static closure take the object context
var_dump($r->getClosureScopeClass()); // Corresponds to the self::class resolution inside a closure
var_dump($r->getClosureCalledClass()); // Corresponds to the static::class resolution inside a closure
?>`

以上示例会输出：

    string(1) "A"
    string(1) "B"
    object(B)#1 (0) {
    }
    object(ReflectionClass)#4 (1) {
      ["name"]=>
      string(1) "A"
    }
    object(ReflectionClass)#4 (1) {
      ["name"]=>
      string(1) "B"
    }

示例 #2 Example showcasing difference between ReflectionFunctionAbstract::getClosureCalledClass(), ReflectionFunctionAbstract::getClosureScopeClass(), and ReflectionFunctionAbstract::getClosureThis() with a static closure without an object context

`<?php
class A
{
public function getClosure()
{
var_dump(self::class, static::class);
return static function() {};
}
}
class B extends A {}
$b = new B();
$c = $b->getClosure();
$r = new ReflectionFunction($c);
var_dump($r->getClosureThis()); // NULL, since the pseudo-variable $this is not available in a static context
var_dump($r->getClosureScopeClass()); // Corresponds to the self::class resolution inside a closure
var_dump($r->getClosureCalledClass()); // Corresponds to the static::class resolution inside a closure
?>`

以上示例会输出：

    string(1) "A"
    string(1) "B"
    NULL
    object(ReflectionClass)#4 (1) {
      ["name"]=>
      string(1) "A"
    }
    object(ReflectionClass)#4 (1) {
      ["name"]=>
      string(1) "B"
    }

### 参见

- ReflectionFunctionAbstract::getClosureScopeClass() - Returns the class corresponding to the scope inside a closure
- ReflectionFunctionAbstract::getClosureThis() - 返回闭包内与 $this 对应的对象
- 后期静态绑定

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