3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array1 = array('A', 'B'); $array2 = array('1', '2', '3'); $num = count($array2); //The total number of possible combinations $total = pow(2, $num); $temp = array(); //Loop through each possible combination for ($i = 0; $i < $total; $i++) { //For each combination check if each bit is set for ($j = 0; $j < $num; $j++) { //Is bit $j set in $i? if (pow(2, $j) & $i) $temp[] = $words[$j]; } } print_r($temp);
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Array ( [0] => [1] => [2] => [3] => [4] => [5] => [6] => [7] => [8] => [9] => [10] => [11] => )
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Notice: Undefined variable: words in /in/lGIRl on line 17 Array ( [0] => [1] => [2] => [3] => [4] => [5] => [6] => [7] => [8] => [9] => [10] => [11] => )