# ReflectionFunctionAbstract::isClosure

(PHP 5 >= 5.3.0, PHP 7)

ReflectionFunctionAbstract::isClosure — Checks if closure

### Description

public ReflectionFunctionAbstract::isClosure ( ) : bool

Checks whether the reflected function is a Closure.

### Parameters

This function has no parameters.

### Return Values

Returns `TRUE` if the function is a Closure, otherwise `FALSE`.

### Examples

Example #1 ReflectionFunctionAbstract::isClosure() example

`<?php
// Non-closure
$function1 = 'str_replace';
$reflection1 = new ReflectionFunction($function1);
var_dump($reflection1->isClosure());
// Closure
$function2 = function () {};
$reflection2 = new ReflectionFunction($function2);
var_dump($reflection2->isClosure());
?>`

The above example will output:

    bool(false)
    bool(true)

### See Also

- ReflectionFunctionAbstract::isGenerator() - Returns whether this function is a generator