3v4l.org

run code in 300+ PHP versions simultaneously

@ 2015-11-01T18:49:34Z

<?php

class Super
{
    public $child;
    
    function setChild(Child $child){
        echo "setting child to super\n";
        $this->child = $child;
        if($child->getSuper() !== $this)
            $child->setSuper($this);
    }
    
    function getChild(){
        return $this->child;
    }
}

class Child
{
    public $super;
    
    function setSuper(Super $super){
        echo "setting super to child\n";
        $this->super = $super;
        if($super->getChild() !== $this)
            $this->super->setChild($this);
    }
    
    function getSuper(){
        return $this->super;
    }
}

$super = new Super;
$child = new Child;
$super->setChild($child);
var_dump($super);

$super = new Super;
$child = new Child;
$child->setSuper($super);
var_dump($super);

Output for git.master, git.master_jit, rfc.property-hooks: setting child to super setting super to child object(Super)#1 (1) { ["child"]=> object(Child)#2 (1) { ["super"]=> *RECURSION* } } setting super to child setting child to super object(Super)#3 (1) { ["child"]=> object(Child)#4 (1) { ["super"]=> *RECURSION* } }

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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

57.01 ms | 401 KiB | 8 Q