3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = array_merge([], null, array(1,23,4)); var_dump($x);
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: array_merge(): Argument #2 is not an array in /in/hpZ8K on line 2 NULL
Output for hhvm-3.12.0
Warning: Invalid operand type was used: expects array(s) in /in/hpZ8K on line 2 NULL
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/hpZ8K on line 2
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/hpZ8K on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/hpZ8K on line 2
Process exited with code 255.