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run code in 300+ PHP versions simultaneously
<?php $obj = new stdClass; $obj->{123} = "foo"; // int 123 -> string "123" (object property) $arr = (array) $obj; $arr["123"] = "bar"; // string "123" -> int 123 (numeric array key) var_dump($arr);
Output for 7.2.0 - 7.2.33, 7.3.12 - 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
array(1) { [123]=> string(3) "bar" }
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
array(2) { ["123"]=> string(3) "foo" [123]=> string(3) "bar" }
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Property name must be a string in /in/b2ZYF on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.
preferences:
248.67 ms | 401 KiB | 359 Q