3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public $b = false; function __construct(&$oB) { $this->b = $oB; } } class B { public $a = false; function __construct(&$oA) { $this->a = $oA; } } $aDepends = false; $pLink = &$aDepends; $oB = new B($pLink); $oA = new A($oB); $aDepends=$oA; var_dump($oA); var_dump($oB);
Output for 5.5.0 - 5.5.26, 5.5.31 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(A)#2 (1) { ["b"]=> object(B)#1 (1) { ["a"]=> bool(false) } } object(B)#1 (1) { ["a"]=> bool(false) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 object(A)#2 (1) { ["b"]=> object(B)#1 (1) { ["a"]=> bool(false) } } object(B)#1 (1) { ["a"]=> bool(false) }
Output for 5.5.27 - 5.5.30

Process exited with code 137.

preferences:
241.82 ms | 401 KiB | 329 Q