3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "Hello World!"; for ($i = 0; $i <= 5; $i++) { var_dump($string[$i]); unset($string[$i]); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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
string(1) "H" Fatal error: Uncaught Error: Cannot unset string offsets in /in/ZOkDO:6 Stack trace: #0 {main} thrown in /in/ZOkDO on line 6
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
string(1) "H" Fatal error: Cannot unset string offsets in /in/ZOkDO on line 6
Process exited with code 255.

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