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<?php $arr = [ [15, 16, 8, 1], [2, 3, 4, 7], [9, 11, 19, 6] ]; function bubbleSortRowCol(&$arr) { $colCount = count($arr[0]); $rowCount = count($arr); $tempArr = []; $columnArr = []; foreach($arr as $key => $value) { $tempArr[$key] = bubbleSort($value); } for($i = 0; $i < $colCount; $i++) { $columnArr[$i] = bubbleSort(array_column($tempArr, $i)); } for($i = 0; $i < $rowCount; $i++) { $tempArr[$i] = bubbleSort(array_column($$columnArr, $i)); } $arr = $tempArr; } function bubbleSort($arr) { $n = sizeof($arr); for ($i = 1; $i < $n; $i++) { $flag = false; for ($j = $n - 1; $j >= $i; $j--) { if($arr[$j-1] > $arr[$j]) { $tmp = $arr[$j - 1]; $arr[$j - 1] = $arr[$j]; $arr[$j] = $tmp; $flag = true; } } if (!$flag) { break; } } return $arr; } function bSort($arr) { bubbleSortRowCol($arr); return $arr; } print_r(bSort($arr));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Array to string conversion in /in/87vXM on line 24 Warning: Undefined variable $Array in /in/87vXM on line 24 Fatal error: Uncaught TypeError: array_column(): Argument #1 ($array) must be of type array, null given in /in/87vXM:24 Stack trace: #0 /in/87vXM(24): array_column(NULL, 0) #1 /in/87vXM(53): bubbleSortRowCol(Array) #2 /in/87vXM(58): bSort(Array) #3 {main} thrown in /in/87vXM on line 24
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Array ( [0] => [1] => [2] => )
Output for 7.3.32 - 7.3.33
Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Warning: sizeof(): Parameter must be an array or an object that implements Countable in /in/87vXM on line 32 Array ( [0] => [1] => [2] => )
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.1.20
Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Notice: Array to string conversion in /in/87vXM on line 24 Notice: Undefined variable: Array in /in/87vXM on line 24 Warning: array_column() expects parameter 1 to be array, null given in /in/87vXM on line 24 Array ( [0] => [1] => [2] => )
Output for 7.1.10

Process exited with code 137.
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