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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = new stdClass(); $a->{0} = 'X'; $a->{1} = 'Y'; $x = unserialize(serialize($a)); $prop = 1; var_dump($x->$prop, $x->{1});
based on vdYOY
Output for 5.0.0 - 5.2.5, 5.3.9 - 7.2.0
string(1) "Y" string(1) "Y"
Output for 5.2.6 - 5.3.8
Notice: Undefined property: stdClass::$1 in /in/7gB4s on line 7 Notice: Undefined property: stdClass::$1 in /in/7gB4s on line 7 NULL NULL
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/7gB4s on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.