3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array_merge_recursive(['k1' => [1,2,3]], ['k1' => [1,2,3]]); var_dump($a);
Output for 5.4.0 - 7.1.0
array(1) { ["k1"]=> array(6) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(1) [4]=> int(2) [5]=> int(3) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/vIF8N on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/vIF8N on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/vIF8N on line 3
Process exited with code 255.