3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = new stdClass(); $i->{"1234"} = "test"; $i = (array) $i; foreach ($i as $key => $value) { var_dump($key, $value, $i[(int)$key]); }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 7.2.5 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(1234) string(4) "test" string(4) "test"
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Undefined offset: 1234 in /in/UXVBr on line 7 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
Notice: Undefined offset: 1234 in /in/UXVBr on line 7 string(4) "1234" string(4) "test" NULL

preferences:
234.34 ms | 402 KiB | 367 Q