3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array_merge_recursive(['k1' => [1,2,3]], ['k1' => [1,2,3]]) var_dump($a);
Output for 5.4.0 - 5.4.19
Parse error: syntax error, unexpected 'var_dump' (T_STRING) in /in/Ps1CB on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected '[', expecting ')' in /in/Ps1CB on line 3
Process exited with code 255.
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182.82 ms | 1395 KiB | 55 Q