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@ 2014-07-06T02:32:06Z

<?php

trait ClosureInATrait
{
	public static function getClosureInTrait()
    {
		return function () {
            return __CLASS__;
        };
    }
}

class ClassConstantTest
{
	use ClosureInATrait;

	public static function getClosureInClass()
    {
		return function () {
            return __CLASS__;
        };
    }
}

$closureInClass = ClassConstantTest::getClosureInClass();
$closureInTrait = ClassConstantTest::getClosureInTrait();

echo 'Closure before bind: ' . PHP_EOL;
echo 'Class closure: ' . PHP_EOL;
var_dump($closureInClass());
echo 'Trait closure: ' . PHP_EOL;
var_dump($closureInTrait());

$closureInClass = Closure::bind($closureInClass, null, 'stdClass');
$closureInTrait = Closure::bind($closureInTrait, null, 'stdClass');

echo 'Closure after bind: ' . PHP_EOL;
echo 'Class closure: ' . PHP_EOL;
var_dump($closureInClass());
echo 'Trait closure: ' . PHP_EOL;
var_dump($closureInTrait());

Output for git.master, git.master_jit, rfc.property-hooks: Closure before bind: Class closure: string(17) "ClassConstantTest" Trait closure: string(17) "ClassConstantTest" Warning: Cannot bind closure to scope of internal class stdClass in /in/SGf5a on line 34 Warning: Cannot bind closure to scope of internal class stdClass in /in/SGf5a on line 35 Closure after bind: Class closure: Fatal error: Uncaught Error: Value of type null is not callable in /in/SGf5a:39 Stack trace: #0 {main} thrown in /in/SGf5a on line 39
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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