3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = new stdClass(); $i->{1234} = "test"; $i = (array) $i; var_dump($i); foreach ($i as $key => $value) { var_dump($key, $value, $i[$key]); }
Output for 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 - 8.2.17, 8.3.0 - 8.3.4
array(1) { [1234]=> string(4) "test" } int(1234) string(4) "test" string(4) "test"
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
array(1) { ["1234"]=> string(4) "test" } Notice: Undefined offset: 1234 in /in/7p74j on line 8 string(4) "1234" string(4) "test" NULL
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
array(1) { ["1234"]=> string(4) "test" } string(4) "1234" string(4) "test" NULL
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
<br /> <b>Fatal error</b>: Property name must be a string in <b>/in/7p74j</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.

preferences:
223.34 ms | 401 KiB | 356 Q