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(null,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)
8.3.60.0070.01116.63
8.3.50.0120.00722.04
8.3.40.0110.01118.73
8.3.30.0140.00019.06
8.3.20.0030.00620.22
8.3.10.0000.00823.71
8.3.00.0090.00920.77
8.2.180.0090.00618.29
8.2.170.0190.00322.96
8.2.160.0140.00320.29
8.2.150.0170.00324.18
8.2.140.0080.00024.66
8.2.130.0140.00426.16
8.2.120.0060.00322.05
8.2.110.0030.00722.18
8.2.100.0000.01219.52
8.2.90.0000.00819.34
8.2.80.0060.00317.97
8.2.70.0070.00417.50
8.2.60.0040.00418.05
8.2.50.0080.00018.07
8.2.40.0000.00818.28
8.2.30.0030.00518.19
8.2.20.0000.00817.80
8.2.10.0050.00317.88
8.2.00.0030.00617.88
8.1.280.0140.00025.92
8.1.270.0130.00323.92
8.1.260.0030.00626.35
8.1.250.0100.00728.09
8.1.240.0060.00323.80
8.1.230.0090.00318.98
8.1.220.0000.00817.79
8.1.210.0000.00818.77
8.1.200.0000.01017.21
8.1.190.0000.00917.66
8.1.180.0080.00018.10
8.1.170.0000.01018.50
8.1.160.0070.00022.06
8.1.150.0030.00618.69
8.1.140.0000.00817.38
8.1.130.0040.00717.41
8.1.120.0000.00717.43
8.1.110.0030.00517.55
8.1.100.0000.00717.51
8.1.90.0000.00817.51
8.1.80.0050.00217.40
8.1.70.0070.00017.47
8.1.60.0000.00817.57
8.1.50.0000.00917.67
8.1.40.0040.00417.62
8.1.30.0000.00917.63
8.1.20.0040.00417.80
8.1.10.0030.00617.62
8.1.00.0040.00717.53
8.0.300.0000.00818.77
8.0.290.0040.00416.88
8.0.280.0000.00718.50
8.0.270.0040.00417.18
8.0.260.0050.00316.86
8.0.250.0000.00716.90
8.0.240.0070.00017.00
8.0.230.0050.00217.01
8.0.220.0000.00816.99
8.0.210.0000.00816.95
8.0.200.0000.00616.97
8.0.190.0040.00416.97
8.0.180.0070.00016.84
8.0.170.0040.00416.90
8.0.160.0040.00416.80
8.0.150.0050.00316.82
8.0.140.0040.00416.80
8.0.130.0030.00313.46
8.0.120.0050.00316.80
8.0.110.0000.00716.91
8.0.100.0050.00316.86
8.0.90.0040.00416.86
8.0.80.0120.00617.01
8.0.70.0000.00816.82
8.0.60.0000.00816.82
8.0.50.0000.00816.85
8.0.30.0100.01017.00
8.0.20.0090.01117.40
8.0.10.0000.00717.07
8.0.00.0160.00817.04
7.4.330.0050.00015.00
7.4.320.0030.00316.62
7.4.300.0060.00016.52
7.4.290.0000.00716.63
7.4.280.0040.00416.65
7.4.270.0070.00016.55
7.4.260.0000.00816.65
7.4.250.0070.00016.57
7.4.240.0040.00416.64
7.4.230.0000.00716.55
7.4.220.0030.01716.71
7.4.210.0080.00916.65
7.4.200.0000.00716.61
7.4.190.0040.00416.80
7.4.160.0110.00516.48
7.4.150.0130.00317.40
7.4.140.0060.01117.86
7.4.130.0100.00816.56
7.4.120.0080.01016.53
7.4.110.0100.00716.45
7.4.100.0140.00516.62
7.4.90.0190.00016.56
7.4.80.0100.01319.39
7.4.70.0150.00616.47
7.4.60.0130.00616.45
7.4.50.0030.00616.59
7.4.40.0070.01022.77
7.4.30.0070.01016.53
7.4.10.0130.00714.95
7.4.00.0080.01014.84
7.3.330.0060.00013.20
7.3.320.0000.00613.18
7.3.310.0030.00316.41
7.3.300.0040.00416.33
7.3.290.0090.00616.34
7.3.280.0070.01016.43
7.3.270.0160.00417.40
7.3.260.0120.00616.45
7.3.250.0120.00616.49
7.3.240.0100.01016.64
7.3.230.0110.00616.50
7.3.210.0150.00716.57
7.3.200.0100.00719.39
7.3.190.0100.01016.61
7.3.180.0070.01116.61
7.3.170.0100.01316.40
7.3.160.0060.01116.59
7.3.130.0060.01214.56
7.3.120.0070.01214.87
7.3.110.0060.01014.64
7.3.100.0050.00714.81
7.3.90.0020.01114.79
7.3.80.0050.00715.01
7.3.70.0040.00914.58
7.3.60.0020.01114.84
7.3.50.0030.01114.99
7.3.40.0080.00414.82
7.3.30.0070.00714.79
7.3.20.0050.01016.50
7.3.10.0130.00416.34
7.3.00.0050.00916.58
7.2.330.0130.00316.66
7.2.320.0030.01316.75
7.2.310.0220.00016.73
7.2.300.0050.01616.68
7.2.290.0090.01216.78
7.2.260.0000.01815.31
7.2.250.0100.00814.91
7.2.240.0070.01215.26
7.2.230.0050.00914.98
7.2.220.0130.00315.00
7.2.210.0050.00815.11
7.2.200.0090.00615.06
7.2.190.0090.00615.01
7.2.180.0040.00914.91
7.2.170.0040.00814.99
7.2.160.0030.00915.06
7.2.150.0030.01216.74
7.2.140.0060.00917.03
7.2.130.0050.00916.81
7.2.120.0280.00816.60
7.2.110.0040.01116.93
7.2.100.0030.00916.85
7.2.90.0040.01116.61
7.2.80.0140.00716.84
7.2.70.0070.00716.75
7.2.60.0030.01216.78
7.2.50.0130.00516.73
7.2.40.0120.01216.56
7.2.30.0040.01116.87
7.2.20.0090.01216.52
7.2.10.0230.00416.73
7.2.00.0120.00817.54
7.1.330.0050.00815.77
7.1.320.0040.00815.89
7.1.310.0040.00815.86
7.1.300.0060.00815.74
7.1.290.0100.00215.88
7.1.280.0050.00815.73
7.1.270.0030.00915.70
7.1.260.0070.00415.68
7.1.250.0110.00915.71
7.1.240.0030.01015.35
7.1.230.0050.00915.77
7.1.220.0000.01515.66
7.1.210.0060.00315.73
7.1.200.0000.01515.59
7.1.190.0030.00915.75
7.1.180.0030.01015.66
7.1.170.0100.00315.68
7.1.160.0030.00915.52
7.1.150.0120.00915.65
7.1.140.0070.01415.66
7.1.130.0100.01015.65
7.1.120.0060.01215.45
7.1.110.0120.00615.70
7.1.100.0040.00917.11
7.1.90.0070.00715.54
7.1.80.0000.01115.95
7.1.70.0090.00616.29
7.1.60.0070.01017.46
7.1.50.0050.01316.25
7.1.40.0120.00315.48
7.1.30.0100.00315.73
7.1.20.0000.00915.93
7.1.10.0040.00815.79
7.1.00.0050.04019.20
7.0.330.0070.00715.19
7.0.320.0050.00515.24
7.0.310.0030.01715.41
7.0.300.0040.01214.98
7.0.290.0030.01015.30
7.0.280.0080.00814.96
7.0.270.0070.00414.82
7.0.260.0030.01215.39
7.0.250.0030.01415.40
7.0.240.0030.01215.35
7.0.230.0040.01114.87
7.0.220.0060.00915.16
7.0.210.0100.00715.11
7.0.200.0050.00316.03
7.0.190.0030.00915.25
7.0.180.0080.00415.34
7.0.170.0030.00815.21
7.0.160.0000.01614.94
7.0.150.0070.00715.29
7.0.140.0050.04018.65
7.0.130.0040.01015.38
7.0.120.0120.00315.14
7.0.110.0030.00615.35
7.0.100.0270.04617.57
7.0.90.0230.04717.65
7.0.80.0270.04217.75
7.0.70.0330.02817.74
7.0.60.0300.04817.74
7.0.50.0330.04317.97
7.0.40.0050.04916.68
7.0.30.0070.04416.79
7.0.20.0070.04616.68
7.0.10.0080.03216.78
7.0.00.0030.05116.64
5.6.400.0040.01114.13
5.6.390.0050.00514.54
5.6.380.0090.00314.25
5.6.370.0100.01014.23
5.6.360.0090.00614.53
5.6.350.0000.01314.43
5.6.340.0040.01114.20
5.6.330.0130.00314.23
5.6.320.0070.01014.51
5.6.310.0030.00714.67
5.6.300.0070.00214.39
5.6.290.0070.00714.38
5.6.280.0030.04317.61
5.6.270.0040.01214.61
5.6.260.0030.01014.45
5.6.250.0130.03817.48
5.6.240.0050.04717.45
5.6.230.0050.04517.57
5.6.220.0060.04617.56
5.6.210.0070.03917.58
5.6.200.0120.04217.60
5.6.190.0080.04517.83
5.6.180.0130.03617.73
5.6.170.0060.04617.72
5.6.160.0070.04417.81
5.6.150.0090.04217.83
5.6.140.0080.03917.97
5.6.130.0100.03917.66
5.6.120.0070.04617.67
5.6.110.0100.04217.64
5.6.100.0030.05017.82
5.6.90.0070.02917.71
5.6.80.0120.03417.35
5.6.70.0080.03517.52
5.6.60.0050.03217.36
5.6.50.0070.04217.27
5.6.40.0120.03417.28
5.6.30.0050.04717.37
5.6.20.0100.04217.53
5.6.10.0100.03817.54
5.6.00.0030.04817.28
5.5.380.0080.04317.59
5.5.370.0030.05017.21
5.5.360.0030.04817.33
5.5.350.0070.04417.46
5.5.340.0060.04317.77
5.5.330.0100.04517.51
5.5.320.0070.04317.46
5.5.310.0080.04617.77
5.5.300.0050.04017.58
5.5.290.0070.04817.55
5.5.280.0030.04017.48
5.5.270.0020.05017.64
5.5.260.0070.04417.63
5.5.250.0070.04617.55
5.5.240.0070.04517.27
5.5.230.0030.04917.34
5.5.220.0050.02917.18
5.5.210.0050.04517.31
5.5.200.0050.03817.20
5.5.190.0050.04517.28
5.5.180.0070.04217.33
5.5.170.0030.00614.04
5.5.160.0100.03917.28
5.5.150.0040.04517.38
5.5.140.0070.04817.35
5.5.130.0120.03517.22
5.5.120.0080.03317.13
5.5.110.0100.01917.26
5.5.100.0070.04017.18
5.5.90.0050.04317.36
5.5.80.0060.04517.13
5.5.70.0100.03917.22
5.5.60.0060.02517.14
5.5.50.0080.04117.13
5.5.40.0130.03816.97
5.5.30.0080.04017.17
5.5.20.0020.04517.16
5.5.10.0080.04317.04
5.5.00.0050.04517.15
5.4.450.0110.03815.27
5.4.440.0090.04015.28
5.4.430.0030.04415.28
5.4.420.0100.03115.51
5.4.410.0080.04015.23
5.4.400.0080.03715.13
5.4.390.0100.03915.07
5.4.380.0070.03714.99
5.4.370.0100.02615.31
5.4.360.0070.03715.26
5.4.350.0070.04015.06
5.4.340.0060.02515.11
5.4.330.0000.00711.29
5.4.320.0090.02514.89
5.4.310.0070.04015.27
5.4.300.0150.02815.14
5.4.290.0040.03415.09
5.4.280.0030.04315.23
5.4.270.0060.02114.89
5.4.260.0040.04215.12
5.4.250.0060.03815.04
5.4.240.0090.03514.96
5.4.230.0050.02315.05
5.4.220.0070.03715.11
5.4.210.0090.03914.97
5.4.200.0070.03215.03
5.4.190.0090.03815.06
5.4.180.0080.04015.07
5.4.170.0060.03915.10
5.4.160.0050.04315.22
5.4.150.0030.04315.02
5.4.140.0070.03813.88
5.4.130.0030.02514.03
5.4.120.0050.02513.77
5.4.110.0050.03813.90
5.4.100.0050.02513.81
5.4.90.0080.03813.93
5.4.80.0060.03313.88
5.4.70.0030.03213.83
5.4.60.0110.03713.93
5.4.50.0050.04313.75
5.4.40.0110.03313.84
5.4.30.0030.04113.86
5.4.20.0080.04013.90
5.4.10.0050.03113.79
5.4.00.0020.03713.55
5.3.290.0050.03712.70
5.3.280.0100.03812.52
5.3.270.0030.03912.72
5.3.260.0050.03912.76
5.3.250.0100.03112.59
5.3.240.0080.04012.62
5.3.230.0080.03512.72
5.3.220.0050.03912.54
5.3.210.0030.04412.47
5.3.200.0070.03512.65
5.3.190.0050.04012.66
5.3.180.0130.03312.74
5.3.170.0020.04512.56
5.3.160.0020.03412.75
5.3.150.0020.03812.78
5.3.140.0050.02712.75
5.3.130.0030.03912.61
5.3.120.0120.03412.66
5.3.110.0070.03812.74
5.3.100.0090.03512.29
5.3.90.0050.03912.29
5.3.80.0020.04012.33
5.3.70.0090.03312.33
5.3.60.0020.04412.34
5.3.50.0070.03612.30
5.3.40.0070.04012.28
5.3.30.0050.04012.39
5.3.20.0050.04012.21
5.3.10.0070.03512.02
5.3.00.0000.03611.96
5.2.170.0030.06311.35
5.2.160.0030.06311.13
5.2.150.0100.03011.07
5.2.140.0030.06311.26
5.2.130.0030.06711.09
5.2.120.0170.05011.28
5.2.110.0070.06011.19
5.2.100.0100.05711.23
5.2.90.0000.03711.11
5.2.80.0030.05011.08
5.2.70.0070.06011.22
5.2.60.0070.06310.98
5.2.50.0000.06011.20
5.2.40.0070.03711.13
5.2.30.0100.04310.96
5.2.20.0030.06011.02
5.2.10.0070.06011.00
5.2.00.0070.06010.82
5.1.60.0130.02310.19
5.1.50.0070.05310.19
5.1.40.0030.05310.19
5.1.30.0070.05710.48
5.1.20.0000.05310.51
5.1.10.0100.03010.24
5.1.00.0070.05310.26
5.0.50.0070.04010.19
5.0.40.0100.04010.19
5.0.30.0070.06710.19
5.0.20.0030.03310.19
5.0.10.0030.04710.19
5.0.00.0000.07310.19
4.4.90.0030.03310.19
4.4.80.0030.03710.19
4.4.70.0070.03010.19
4.4.60.0000.03710.19
4.4.50.0000.03710.19
4.4.40.0030.05310.19
4.4.30.0100.02310.19
4.4.20.0000.02010.19
4.4.10.0030.03310.19
4.4.00.0070.04710.19
4.3.110.0000.02010.19
4.3.100.0000.02710.19
4.3.90.0070.03010.19
4.3.80.0030.05310.19
4.3.70.0030.03310.19
4.3.60.0030.02710.19
4.3.50.0100.03010.19
4.3.40.0070.04710.19
4.3.30.0000.03310.19
4.3.20.0000.03710.19
4.3.10.0000.03710.19
4.3.00.0000.03310.19

preferences:
43.52 ms | 401 KiB | 5 Q