3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ary = [ 'a', 'b',, 'c' ]; if (array_key_exists(1, $ary)) { print 'exists'; } else { print 'does not exist'; }
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected ',', expecting ']' in /in/3OZBf on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/3OZBf on line 3
Process exited with code 255.
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183.45 ms | 1395 KiB | 66 Q