3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a1 = [ 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4 ]; $a2 = [ 'b' => 3, ]; var_dump(array_diff_key($a1, $a2));
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(1) ["c"]=> int(3) ["d"]=> int(4) }
Output for 5.2.3 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/5UdMv on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected '[' in <b>/in/5UdMv</b> on line <b>2</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected '[' in <b>/in/5UdMv</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/5UdMv</b> on line <b>2</b><br />
Process exited with code 255.