3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['попа', 'ручка']; var_dump(in_array('', array_keys($arr)); var_dump(in_array('', array_keys($arr), true));
Output for 5.4.0 - 5.4.32
Parse error: syntax error, unexpected ';' in /in/pKWV0 on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/pKWV0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/pKWV0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pKWV0 on line 3
Process exited with code 255.
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212.86 ms | 1395 KiB | 123 Q