3v4l.org

run code in 300+ PHP versions simultaneously
<?php print_r(array_merge(array('a'=>1, 'b'=>2), array('b'=>3, 'c'=>4));
Output for 5.3.0 - 5.3.17, 5.4.0 - 5.4.7
Parse error: syntax error, unexpected ';' in P4Ltu on line 2
Process exited with code 255.
preferences:
166.43 ms | 1395 KiB | 33 Q