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<?php function getArray($fill,$noOfItem){ $maxIndex = floor($noOfItem/$fill); $rang = range(1,20); $finalArray = []; foreach($rang as $key => $val){ if($val % $maxIndex == 0 && array_sum($finalArray) < $fill){ $finalArray[] =1; }else{ $finalArray[] =0; } } if($finalArray[0] == 1 && $finalArray[count($finalArray)-1] == 0){ $finalArray[0] = 0; $finalArray[count($finalArray)-1] = 1; } print_r($finalArray); } getArray(6,20); getArray(8,20); getArray(19,20); Output: https://3v4l.org/QY6HQ
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => 0 [1] => 0 [2] => 1 [3] => 0 [4] => 0 [5] => 1 [6] => 0 [7] => 0 [8] => 1 [9] => 0 [10] => 0 [11] => 1 [12] => 0 [13] => 0 [14] => 1 [15] => 0 [16] => 0 [17] => 1 [18] => 0 [19] => 0 ) Array ( [0] => 0 [1] => 1 [2] => 0 [3] => 1 [4] => 0 [5] => 1 [6] => 0 [7] => 1 [8] => 0 [9] => 1 [10] => 0 [11] => 1 [12] => 0 [13] => 1 [14] => 0 [15] => 1 [16] => 0 [17] => 0 [18] => 0 [19] => 0 ) Array ( [0] => 0 [1] => 1 [2] => 1 [3] => 1 [4] => 1 [5] => 1 [6] => 1 [7] => 1 [8] => 1 [9] => 1 [10] => 1 [11] => 1 [12] => 1 [13] => 1 [14] => 1 [15] => 1 [16] => 1 [17] => 1 [18] => 1 [19] => 1 )

preferences:
144.7 ms | 404 KiB | 149 Q