3v4l.org

run code in 300+ PHP versions simultaneously

@ 2019-07-19T15:55:14Z

<?php

// An example callback function
function my_callback_function() {
    echo 'hello world!', PHP_EOL;
}

// Callback methods in classes
class ParentClass {
    static function myCallbackMethod() {
        echo 'Hello Parent!', PHP_EOL;
    }
}

class MyClass extends ParentClass {
    static function myCallbackMethod() {
        echo 'Hello Child!', PHP_EOL;
    }
}

class Invokable {
    public function __invoke() {
        echo 'Hello Invokable', PHP_EOL;
    }
}

$obj       = new MyClass();
$invokable = new Invokable();

$callbacks = array(
    'type1' => 'my_callback_function',
    'type2' => array('MyClass', 'myCallbackMethod'),
    'type3' => array($obj, 'myCallbackMethod'),
    'type6' => $invokable,
    'type7' => function() { echo 'Hello Closure', PHP_EOL; },
    'type4' => 'MyClass::myCallbackMethod',
    'type5' => array('MyClass', 'parent::myCallbackMethod'),
);

foreach( $callbacks as $key => $callback ) {
    echo PHP_EOL, 'Testing ', $key, PHP_EOL;
    call_user_func($callback);
    try {
        $callback();
    } catch( Error $e ) {
        echo $e->getMessage(), PHP_EOL;
    }
}

Output for git.master, git.master_jit, rfc.property-hooks: Testing type1 hello world! hello world! Testing type2 Hello Child! Hello Child! Testing type3 Hello Child! Hello Child! Testing type6 Hello Invokable Hello Invokable Testing type7 Hello Closure Hello Closure Testing type4 Hello Child! Hello Child! Testing type5 Deprecated: Callables of the form ["MyClass", "parent::myCallbackMethod"] are deprecated in /in/VfmVa on line 42 Hello Parent! Call to undefined method MyClass::parent::myCallbackMethod()

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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

preferences:dark modelive preview

71.56 ms | 402 KiB | 8 Q