3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [['key'=>'val1'],['key'=>'val2']]; print_r($a); print_r(array_column($a, 'key');
Output for 5.4.0 - 5.4.27
Parse error: syntax error, unexpected ';' in /in/EZlD8 on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/EZlD8 on line 2
Process exited with code 255.
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168.57 ms | 1394 KiB | 64 Q