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run code in 300+ PHP versions simultaneously
<?php $array = array(1,2,3) echo reset(array_keys($array));
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.29, 5.6.8 - 5.6.13
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/NCqnS on line 4
Process exited with code 255.
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183.92 ms | 1395 KiB | 62 Q