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run code in 200+ php & hhvm versions
Bugs & Features
<?php $ary[1] = 123; $obj = (object)$ary; var_dump($obj, $obj->{1});
Output for 7.2.0
object(stdClass)#1 (1) { ["1"]=> int(123) } int(123)
Output for 5.2.6 - 7.1.10
Notice: Undefined property: stdClass::$1 in /in/vFuWT on line 4 object(stdClass)#1 (1) { [1]=> int(123) } NULL
Output for 5.0.0 - 5.2.5
Notice: Undefined property: stdClass::$1 in /in/vFuWT on line 4 object(stdClass)#1 (1) { [1]=> int(123) } NULL
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/vFuWT on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.