3v4l.org

run code in 300+ PHP versions simultaneously
<?php $from = range(1, 25000); $to = array_combine(range(25001, 50000), range(25001, 50000)); foreach($from as $i => $v) { $to = array_merge($from, array($i => $v)); }
Output for 7.3.30 - 7.3.33, 7.4.5, 7.4.20, 7.4.23 - 7.4.33, 8.0.1, 8.0.5 - 8.0.7, 8.0.9 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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, 7.2.0 - 7.2.33, 7.3.12 - 7.3.29, 7.4.0 - 7.4.4, 7.4.6 - 7.4.16, 7.4.21 - 7.4.22, 8.0.0, 8.0.2 - 8.0.3, 8.0.8

Process exited with code 137.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_combine() in /in/IQKvX on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: array_combine() in /in/IQKvX on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_combine() in /in/IQKvX on line 3

preferences:
220.08 ms | 401 KiB | 355 Q