3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $permitted = ['foo' => 'foo', 'bar' => 'bar', 'gah' => 'gah']; $config = ['foo' => 'foo', 'bar' => 'bar', 'no' => 'no']; foreach (array_intersect_key($permitted, $config) as $key) { echo $key; }
based on Db2Tj
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
foobar
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 '[' in /in/t7fFS on line 4
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 '[' in /in/t7fFS on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/t7fFS on line 4
Process exited with code 255.