3v4l.org

run code in 300+ PHP versions simultaneously
<?php class SudokuSolver { protected $sudokuColumns; public function __construct ($sudoku) { $this->sudokuColumns = $sudoku; } protected static function getNumbers () { return array_flip(str_split("123456789")); } // could be static as well public function printOut ($sudoku) { foreach ($sudoku as $column) { foreach ($column as $cell) { echo "|"; if (null !== $cell) { echo $cell; } else { echo " "; } } echo "|\n"; } } public function solve() { if (!$this->checkConsistenz()) { throw new Exception("inconsistent data!"); } } protected function checkConsistenz () { $columns = $this->sudokuColumns; foreach ($columns as $columnIndex => $column) { if (!$this->checkLine($columnIndex,$column)) { return false; } } // check rows -> own method $rows = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { $rows[$rowIndex][$columnIndex] = $cell; } //$this->printOut($rows); } foreach ($rows as $rowIndex => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } // check field -> own method $fields = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { //echo "(3 * ($columnIndex / 3)) + ($rowIndex / 3) = ". (3 * ($columnIndex / 3)) ." + ". ($rowIndex / 3) ."\n"; $fields[(3 * intval($columnIndex / 3)) + intval($rowIndex / 3)][] = $cell; } } print_r($fields); foreach ($rows as $rowIndex => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } return true; } protected function checkLine ($rowIndex, $row) { $numbers = self::getNumbers(); echo "checking $rowIndex..\n"; foreach ($row as $column) { if (null === $column) { continue; } //echo "$column , $numbers\n" . var_export(strpos($numbers,$column),true); if (!array_key_exists($column,$numbers)) { return false; } unset($numbers[$column]); } return true; } } $sudoku = array(); $sudoku[] = array(null,3,null, null,null,null, null,null,null); $sudoku[] = array(3,null,null, 1,9,5, null,null,null); $sudoku[] = array(null,null,8, null,null,null, null,6,null); $sudoku[] = array(8,null,null, null,6,null, null,null,null); $sudoku[] = array(4,null,null, 8,null,null, null,null,1); $sudoku[] = array(null,null,null ,null,2,null, null,null,null); $sudoku[] = array(null,6,null, null,null,null, 2,8,null); $sudoku[] = array(null,null,null, 4,1,9, null,null,5); $sudoku[] = array(null,null,null, null,null,null, null,7,null); $sudokuSolver = new SudokuSolver($sudoku); //$sudokuSolver->printOut($sudoku); $sudokuSolver->solve($sudoku);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.70.0110.00716.63
8.3.60.0070.01118.30
8.3.50.0040.01321.99
8.3.40.0120.00918.81
8.3.30.0180.00018.76
8.3.20.0040.00418.92
8.3.10.0040.00420.96
8.3.00.0040.00423.66
8.2.180.0060.00916.50
8.2.170.0070.00722.96
8.2.160.0000.01420.25
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0070.01126.16
8.2.120.0090.00921.05
8.2.110.0060.00322.13
8.2.100.0060.00617.84
8.2.90.0040.00417.97
8.2.80.0030.00517.97
8.2.70.0110.00017.50
8.2.60.0040.00418.05
8.2.50.0000.00818.07
8.2.40.0050.00318.07
8.2.30.0080.00019.50
8.2.20.0040.00417.80
8.2.10.0040.00417.93
8.2.00.0040.00417.75
8.1.280.0040.01125.92
8.1.270.0130.00723.99
8.1.260.0110.00726.35
8.1.250.0000.00828.09
8.1.240.0000.00823.97
8.1.230.0050.00520.85
8.1.220.0080.00017.74
8.1.210.0030.00618.88
8.1.200.0100.00017.35
8.1.190.0060.00317.66
8.1.180.0040.00418.10
8.1.170.0050.00318.58
8.1.160.0050.00218.95
8.1.150.0050.00318.69
8.1.140.0000.00817.38
8.1.130.0000.00717.50
8.1.120.0000.00817.43
8.1.110.0030.00617.43
8.1.100.0040.00417.58
8.1.90.0000.00817.46
8.1.80.0050.00217.50
8.1.70.0000.00717.36
8.1.60.0030.00617.51
8.1.50.0000.00817.50
8.1.40.0060.00317.48
8.1.30.0060.00317.75
8.1.20.0000.00817.64
8.1.10.0080.00017.53
8.1.00.0030.00517.45
8.0.300.0070.00020.21
8.0.290.0000.00717.16
8.0.280.0000.00718.37
8.0.270.0000.00717.33
8.0.260.0000.00816.83
8.0.250.0040.00417.01
8.0.240.0000.00817.01
8.0.230.0040.00416.91
8.0.220.0030.00516.91
8.0.210.0000.00716.82
8.0.200.0000.00617.01
8.0.190.0040.00417.01
8.0.180.0070.00016.94
8.0.170.0000.00817.01
8.0.160.0040.00417.02
8.0.150.0000.00916.93
8.0.140.0050.00516.79
8.0.130.0060.00013.35
8.0.120.0060.00316.84
8.0.110.0050.00317.04
8.0.100.0000.00816.79
8.0.90.0040.00416.93
8.0.80.0090.01316.94
8.0.70.0040.00416.75
8.0.60.0080.00016.94
8.0.50.0000.00716.90
8.0.30.0050.01417.08
8.0.20.0100.01017.40
8.0.10.0000.00717.19
8.0.00.0120.00616.77
7.4.330.0030.00314.89
7.4.320.0030.00316.58
7.4.300.0030.00316.66
7.4.290.0040.00416.70
7.4.280.0030.00616.66
7.4.270.0030.00316.66
7.4.260.0060.00013.38
7.4.250.0060.00316.63
7.4.240.0000.00716.53
7.4.230.0020.00516.31
7.4.220.0130.00616.42
7.4.210.0080.00916.62
7.4.200.0050.00216.46
7.4.190.0040.00416.65
7.4.160.0100.00716.50
7.4.150.0160.01017.40
7.4.140.0080.01017.86
7.4.130.0130.01116.50
7.4.120.0110.00916.54
7.4.110.0090.00916.68
7.4.100.0090.00916.38
7.4.90.0150.00316.47
7.4.80.0090.00919.39
7.4.70.0090.00916.42
7.4.60.0060.01316.43
7.4.50.0000.00516.22
7.4.40.0030.01422.77
7.4.30.0070.01116.77
7.4.00.0000.01515.07
7.3.330.0030.00313.28
7.3.320.0030.00313.22
7.3.310.0050.00216.24
7.3.300.0030.00316.33
7.3.290.0070.01016.43
7.3.280.0090.00716.39
7.3.270.0130.00617.40
7.3.260.0170.00818.24
7.3.250.0100.00816.64
7.3.240.0100.00716.74
7.3.230.0140.00316.58
7.3.210.0090.00916.41
7.3.200.0070.01719.39
7.3.190.0170.00316.76
7.3.180.0080.00816.64
7.3.170.0140.00316.44
7.3.160.0060.01016.49
7.3.120.0040.01214.92
7.2.330.0120.00916.80
7.2.320.0120.00916.61
7.2.310.0160.00616.85
7.2.300.0170.00016.49
7.2.290.0090.00916.83
7.2.60.0030.01216.71
7.1.200.0030.01015.60
7.1.100.0000.01318.02
7.1.70.0090.00017.04
7.1.60.0060.00617.29
7.1.50.0070.01316.98
7.1.00.0030.06322.35
7.0.200.0070.01316.90
7.0.140.0070.07322.01
7.0.90.0030.07719.98
7.0.80.0070.04719.98
7.0.70.0070.05719.93
7.0.60.0600.07319.93
7.0.50.0430.07720.40
7.0.40.0200.07020.08
7.0.30.0030.09320.10
7.0.20.0100.08320.15
7.0.10.0070.07719.94
7.0.00.0070.07720.07
5.6.230.0030.06020.55
5.6.220.0070.07720.66
5.6.210.0070.04020.59
5.6.200.0030.07721.10
5.6.190.0000.09021.14
5.6.180.0070.08021.06
5.6.170.0030.09020.97
5.6.160.0130.06321.05
5.6.150.0070.05021.16
5.6.140.0200.07321.08
5.6.130.0130.08321.08
5.6.120.0200.06320.99
5.6.110.0130.06720.97
5.6.100.0170.07720.96
5.6.90.0070.06321.11
5.6.80.0070.07320.45
5.6.70.0100.06320.44
5.6.60.0070.08020.48
5.6.50.0070.04320.50
5.6.40.0130.07320.43
5.6.30.0130.07020.48
5.6.20.0070.08020.50
5.6.10.0100.07720.52
5.6.00.0030.08720.55
5.5.370.0130.05720.43
5.5.360.0130.07320.43
5.5.350.0130.07720.37
5.5.340.0170.06720.93
5.5.330.0100.05720.92
5.5.320.0100.04720.88
5.5.310.0000.08720.79
5.5.300.0070.05320.93
5.5.290.0170.07320.93
5.5.280.0170.07720.92
5.5.270.0130.07720.76
5.5.260.0100.09020.95
5.5.250.0100.07720.62
5.5.240.0070.04020.05
5.5.230.0070.08320.17
5.5.220.0100.07020.28
5.5.210.0130.06720.21
5.5.200.0000.08320.28
5.5.190.0000.07720.15
5.5.180.0070.08320.31
5.5.160.0100.07320.20
5.5.150.0100.05320.26
5.5.140.0070.06320.18
5.5.130.0070.06020.32
5.5.120.0070.05720.16
5.5.110.0170.05320.22
5.5.100.0070.04020.21
5.5.90.0100.07020.10
5.5.80.0070.06720.14
5.5.70.0100.07320.07
5.5.60.0100.03320.16
5.5.50.0030.05020.16
5.5.40.0070.06020.17
5.5.30.0070.07720.17
5.5.20.0030.08020.18
5.5.10.0100.06720.02
5.5.00.0000.07720.06
5.4.450.0000.10319.45
5.4.440.0070.04719.37
5.4.430.0070.06719.22
5.4.420.0130.04019.20
5.4.410.0070.05719.25
5.4.400.0100.03719.07
5.4.390.0070.08019.16
5.4.380.0130.07019.15
5.4.370.0100.07019.14
5.4.360.0030.08719.16
5.4.350.0130.06719.13
5.4.340.0100.07019.02
5.4.320.0170.07319.14
5.4.310.0130.05319.09
5.4.300.0070.06319.12
5.4.290.0030.05319.16
5.4.280.0100.04319.22
5.4.270.0070.04018.89
5.4.260.0070.07719.04
5.4.250.0130.07318.86
5.4.240.0070.07019.11
5.4.230.0030.06719.02
5.4.220.0100.05019.22
5.4.210.0100.08019.16
5.4.200.0070.07318.94
5.4.190.0100.07319.08
5.4.180.0000.06319.02
5.4.170.0130.07018.93
5.4.160.0100.05018.85
5.4.150.0070.06718.82
5.4.140.0000.04716.49
5.4.130.0070.04016.43
5.4.120.0000.04316.43
5.4.110.0170.06316.56
5.4.100.0030.06016.38
5.4.90.0230.03016.56
5.4.80.0170.06316.46
5.4.70.0130.07016.53
5.4.60.0000.07716.30
5.4.50.0100.06016.30
5.4.40.0070.07016.50
5.4.30.0070.07016.51
5.4.20.0070.07716.46
5.4.10.0070.08316.51
5.4.00.0100.03715.84
5.3.290.0070.05014.66
5.3.280.0070.08014.63
5.3.270.0070.06314.70
5.3.260.0100.04714.64
5.3.250.0070.07014.65
5.3.240.0200.06314.66
5.3.230.0130.06314.58
5.3.220.0070.04014.58
5.3.210.0000.05014.60
5.3.200.0170.06014.70
5.3.190.0070.05314.68
5.3.180.0130.03714.64
5.3.170.0030.05014.64
5.3.160.0130.04714.59
5.3.150.0070.04314.66
5.3.140.0130.03014.74
5.3.130.0070.08014.67
5.3.120.0070.07314.73
5.3.110.0070.07314.73
5.3.100.0130.06714.07
5.3.90.0170.03014.10
5.3.80.0070.07714.15
5.3.70.0030.05013.97
5.3.60.0070.07314.05
5.3.50.0030.08314.00
5.3.40.0030.08013.92
5.3.30.0070.07314.07
5.3.20.0070.07713.82
5.3.10.0130.04013.63
5.3.00.0100.04013.71
5.2.170.0000.06713.54
5.2.160.0030.05313.54
5.2.150.0100.06013.54
5.2.140.0070.04013.54
5.2.130.0100.05313.54
5.2.120.0030.05313.54
5.2.110.0100.04313.54
5.2.100.0030.05313.54
5.2.90.0100.06013.54
5.2.80.0000.06713.57
5.2.70.0000.05013.57
5.2.60.0000.05313.57
5.2.50.0030.04313.57
5.2.40.0100.06013.57
5.2.30.0070.06313.57
5.2.20.0030.03013.57
5.2.10.0000.03013.57
5.2.00.0030.05713.57
5.1.60.0030.02313.57
5.1.50.0100.06013.57
5.1.40.0070.03313.57
5.1.30.0030.05313.57
5.1.20.0030.04713.57
5.1.10.0030.05013.57
5.1.00.0000.05013.57
5.0.50.0000.05013.57
5.0.40.0030.04313.57
5.0.30.0100.06013.57
5.0.20.0070.03013.57
5.0.10.0030.05013.57
5.0.00.0070.05713.57
4.4.90.0000.01713.57
4.4.80.0030.02713.57
4.4.70.0000.02313.57
4.4.60.0070.01713.57
4.4.50.0000.02013.57
4.4.40.0030.03713.57
4.4.30.0030.01313.57
4.4.20.0000.03313.57
4.4.10.0030.02313.57
4.4.00.0000.03013.57
4.3.110.0030.02013.57
4.3.100.0100.02313.57
4.3.90.0030.01313.57
4.3.80.0070.04713.57
4.3.70.0000.02713.57
4.3.60.0100.02013.57
4.3.50.0070.02013.57
4.3.40.0030.05013.57
4.3.30.0000.02013.57
4.3.20.0000.03713.57
4.3.10.0030.03313.57
4.3.00.0000.02713.57

preferences:
39.4 ms | 401 KiB | 5 Q