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run code in 300+ PHP versions simultaneously
<?php $a = [100,200,300, 400]; $d = 555; while($r = array_pop($a) >=0){} $a[]= abs($r); var_dump($a);
Output for 5.4.0 - 5.4.30, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7

Process exited with code 137.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/IW14u on line 2
Process exited with code 255.
preferences:
148.87 ms | 401 KiB | 201 Q