3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a=array("a"=>"red","b"=>"green"); array_unshift($a,"blue") print_r($a);
Output for 5.4.0 - 5.4.26
Parse error: syntax error, unexpected 'print_r' (T_STRING) in /in/FhI5L on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING in /in/FhI5L on line 4
Process exited with code 255.
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192.07 ms | 1395 KiB | 63 Q