3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = new stdClass(); $a->{1} = 'Y'; $x = unserialize(serialize($a)); $prop = 1; var_dump($x->$prop);
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.5, 5.3.9 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "Y"
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.8
Notice: Undefined property: stdClass::$1 in /in/5vVRY on line 6 NULL
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Property name must be a string in /in/5vVRY on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.
preferences:
237.04 ms | 401 KiB | 341 Q