3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $allBills = [0, 1, 2, null, null]; $bills = array_unique($allBills); if (count($bills) != 1) { $bills = array_filter( $bills, function ($val) { return is_null($val); } ); } print_r($bills);
based on vVELD
Output for 5.4.0 - 7.2.0
Array ( [3] => )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/8lhDW 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 '[' in /in/8lhDW on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/8lhDW on line 3
Process exited with code 255.