3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = ['a'=>1, 'b'=>3, 'c'=>5]; $y = array_merge($x, ['a'=>2, 'b'=>4]); var_dump($y);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { ["a"]=> int(2) ["b"]=> int(4) ["c"]=> int(5) }
Output for 5.3.28 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/hKtqj on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.27
Parse error: syntax error, unexpected '[' in /in/rqkIu on line 2
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/rqkIu on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rqkIu on line 2
Process exited with code 255.
Output for 4.3.0
Parse error: parse error, unexpected '[' in /in/hKtqj on line 2
Process exited with code 255.