3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('a','b') echo array_key_exists('a',$a);
Output for 5.4.0 - 5.4.12
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/Z6Nso on line 4
Process exited with code 255.
Output for 5.3.3 - 5.3.22
Parse error: syntax error, unexpected T_ECHO in /in/Z6Nso on line 4
Process exited with code 255.
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175.67 ms | 1395 KiB | 40 Q