3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Returns the total number of $count-length strings generatable from $letters. function getPermCount($letters, $count) { $result = 1; // k characters from a set of n has n!/(n-k)! possible combinations for($i = strlen($letters) - $count + 1; $i <= strlen($letters); $i++) { $result *= $i; } return $result; } // Decodes $index to a $count-length string from $letters, no repeat chars. function getPerm($letters, $count, $index) { $result = ''; for($i = 0; $i < $count; $i++) { $pos = $index % strlen($letters); $result .= ",".$letters[$pos]; $index = ($index-$pos)/strlen($letters); $letters = substr($letters, 0, $pos) . substr($letters, $pos+1); } return trim($result, ","); } $cars=array("Volvo","BMW","Toyota"); sort($cars); print_r($cars); $letters = 'abc'; $r = array(); //echo '1 letters from 4: '; for($i = 0; $i < getPermCount($letters, 1); $i++) $r[] = getPerm($letters, 1, $i); //echo '2 letters from 4: '; for($i = 0; $i < getPermCount($letters, 2); $i++) $r[] = getPerm($letters, 2, $i); //echo ' 3 letters from 4: '; for($i = 0; $i < getPermCount($letters, 3); $i++) $r[] = getPerm($letters, 3, $i); print_r($r);

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)
8.3.60.0200.00018.31
8.3.50.0100.00822.18
8.3.40.0040.01118.88
8.3.30.0140.00020.35
8.3.20.0040.00418.73
8.3.10.0080.00021.17
8.3.00.0000.00819.81
8.2.180.0110.01116.38
8.2.170.0140.00722.96
8.2.160.0120.00920.57
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00420.02
8.2.110.0060.00320.56
8.2.100.0040.00717.91
8.2.90.0060.00319.17
8.2.80.0000.00719.25
8.2.70.0090.00017.63
8.2.60.0070.00017.93
8.2.50.0030.00518.07
8.2.40.0040.00418.22
8.2.30.0050.00219.41
8.2.20.0050.00317.73
8.2.10.0050.00217.75
8.2.00.0030.00617.63
8.1.280.0210.00025.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0050.00228.09
8.1.240.0030.00722.61
8.1.230.0070.00420.88
8.1.220.0050.00318.77
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0050.00217.40
8.1.180.0030.00518.10
8.1.170.0000.00818.50
8.1.160.0000.00718.86
8.1.150.0000.00718.70
8.1.140.0070.00017.45
8.1.130.0020.00517.70
8.1.120.0000.00717.43
8.1.110.0040.00417.48
8.1.100.0040.00417.47
8.1.90.0040.00317.34
8.1.80.0000.00717.38
8.1.70.0000.00717.30
8.1.60.0050.00317.50
8.1.50.0030.00517.52
8.1.40.0050.00317.52
8.1.30.0000.00817.57
8.1.20.0040.00417.62
8.1.10.0030.00617.60
8.1.00.0080.00017.39
8.0.300.0000.00719.90
8.0.290.0000.00817.18
8.0.280.0040.00418.46
8.0.270.0030.00317.19
8.0.260.0070.00016.74
8.0.250.0000.00816.87
8.0.240.0030.00616.82
8.0.230.0030.00316.83
8.0.220.0030.00616.88
8.0.210.0050.00216.86
8.0.200.0070.00016.89
8.0.190.0040.00416.96
8.0.180.0050.00216.83
8.0.170.0080.00016.88
8.0.160.0000.00716.91
8.0.150.0070.00016.89
8.0.140.0030.00516.75
8.0.130.0030.00313.34
8.0.120.0040.00416.89
8.0.110.0030.00516.79
8.0.100.0000.00716.93
8.0.90.0040.00416.97
8.0.80.0070.00716.83
8.0.70.0000.00716.78
8.0.60.0000.00816.85
8.0.50.0050.00216.95
8.0.30.0100.00916.93
8.0.20.0090.01017.45
8.0.10.0040.00416.89
8.0.00.0100.00816.71
7.4.330.0050.00016.73
7.4.320.0040.00416.52
7.4.300.0000.00716.65
7.4.290.0000.00616.56
7.4.280.0060.00316.46
7.4.270.0030.00316.45
7.4.260.0030.00313.40
7.4.250.0040.00416.50
7.4.240.0000.00716.62
7.4.230.0030.00316.35
7.4.220.0110.00716.41
7.4.210.0110.00516.53
7.4.200.0000.00716.70
7.4.190.0000.00716.62
7.4.160.0060.01016.43
7.4.150.0110.00617.40
7.4.140.0090.00917.86
7.4.130.0140.00316.50
7.4.120.0110.00616.52
7.4.110.0120.00616.41
7.4.100.0100.00716.61
7.4.90.0130.00416.49
7.4.80.0030.01319.39
7.4.70.0120.00816.46
7.4.60.0070.01016.57
7.4.50.0000.00816.31
7.4.40.0070.01022.77
7.4.30.0100.00716.57
7.4.10.0100.01014.91
7.4.00.0100.00814.83
7.3.330.0030.00313.40
7.3.320.0030.00313.41
7.3.310.0000.00716.27
7.3.300.0070.00016.47
7.3.290.0070.00716.40
7.3.280.0110.00516.38
7.3.270.0090.00917.40
7.3.260.0140.00718.24
7.3.250.0110.00616.35
7.3.240.0070.01316.45
7.3.230.0110.00816.79
7.3.210.0130.00516.34
7.3.200.0120.00919.39
7.3.190.0140.00916.45
7.3.180.0100.00616.54
7.3.170.0070.01316.39
7.3.160.0070.01116.50
7.3.130.0060.00914.87
7.3.120.0050.01114.84
7.3.110.0090.00914.69
7.3.100.0090.00714.82
7.3.90.0080.00814.89
7.3.80.0070.00714.83
7.3.70.0070.00914.77
7.3.60.0110.00614.88
7.3.50.0120.00514.79
7.3.40.0090.00514.92
7.3.30.0020.01214.75
7.3.20.0080.00616.65
7.3.10.0060.01016.63
7.3.00.0000.01116.67
7.2.330.0110.00716.78
7.2.320.0110.00716.48
7.2.310.0030.01416.76
7.2.300.0030.01316.77
7.2.290.0100.01316.80
7.2.260.0070.01015.20
7.2.250.0110.00815.13
7.2.240.0050.01215.21
7.2.230.0020.01315.10
7.2.220.0090.00915.00
7.2.210.0080.00714.92
7.2.200.0060.00615.13
7.2.190.0070.00914.93
7.2.180.0040.01014.96
7.2.170.0070.00514.98
7.2.160.0030.01215.03
7.2.150.0100.01017.01
7.2.140.0070.01117.07
7.2.130.0100.00317.05
7.2.120.0040.01117.05
7.2.110.0070.01016.90
7.2.100.0110.00717.00
7.2.90.0000.01016.80
7.2.80.0030.01316.80
7.2.70.0070.01016.85
7.2.60.0030.01216.79
7.2.50.0120.00616.88
7.2.40.0030.01317.09
7.2.30.0060.00617.04
7.2.20.0090.00617.02
7.2.10.0000.01017.01
7.2.00.0030.00618.15
7.1.330.0060.00915.71
7.1.320.0060.00815.96
7.1.310.0020.01415.90
7.1.300.0090.00515.77
7.1.290.0070.00615.68
7.1.280.0080.00615.71
7.1.270.0020.01015.97
7.1.260.0080.00615.61
7.1.250.0040.01115.86
7.1.240.0040.01415.89
7.1.230.0030.01015.63
7.1.220.0070.01015.85
7.1.210.0030.00915.82
7.1.200.0030.01015.78
7.1.190.0070.00315.84
7.1.180.0050.00515.78
7.1.170.0000.01615.63
7.1.160.0030.01015.77
7.1.150.0050.00515.75
7.1.140.0080.00815.68
7.1.130.0060.00615.86
7.1.120.0120.00015.68
7.1.110.0070.00415.78
7.1.100.0050.00817.07
7.1.90.0130.00315.89
7.1.80.0070.01015.59
7.1.70.0050.00416.37
7.1.60.0070.00516.70
7.1.50.0060.01116.47
7.1.40.0030.00915.90
7.1.30.0100.00315.80
7.1.20.0030.01015.87
7.1.10.0060.00615.62
7.1.00.0010.03519.10
7.0.330.0030.00915.22
7.0.320.0080.00815.34
7.0.310.0110.00415.15
7.0.300.0110.00415.53
7.0.290.0030.00615.60
7.0.280.0000.00915.48
7.0.270.0060.00915.28
7.0.260.0040.00715.32
7.0.250.0030.00715.52
7.0.240.0030.01315.65
7.0.230.0100.00615.24
7.0.220.0000.01515.46
7.0.210.0060.00315.65
7.0.200.0060.00416.04
7.0.190.0040.00415.34
7.0.180.0120.00615.55
7.0.170.0110.00015.46
7.0.160.0040.01115.38
7.0.150.0060.00615.60
7.0.140.0030.04118.69
7.0.130.0030.01215.60
7.0.120.0070.01015.55
7.0.110.0070.00715.57
7.0.100.0070.02317.74
7.0.90.0120.04417.67
7.0.80.0090.02717.54
7.0.70.0050.04717.79
7.0.60.0050.03217.63
7.0.50.0060.02417.94
7.0.40.0070.03916.82
7.0.30.0090.04116.91
7.0.20.0090.04116.82
7.0.10.0040.04416.68
7.0.00.0090.04716.80
5.6.400.0110.00714.75
5.6.390.0110.00414.57
5.6.380.0070.01014.57
5.6.370.0100.00714.52
5.6.360.0040.01114.38
5.6.350.0040.01114.58
5.6.340.0030.00914.44
5.6.330.0000.00913.97
5.6.320.0040.00414.63
5.6.310.0060.00614.43
5.6.300.0090.00614.29
5.6.290.0140.00014.16
5.6.280.0000.01814.63
5.6.270.0060.00614.42
5.6.260.0100.00714.70
5.6.250.0020.05417.63
5.6.240.0080.02517.46
5.6.230.0030.04317.62
5.6.220.0100.03517.53
5.6.210.0050.03317.63
5.6.200.0070.04217.81
5.6.190.0180.04317.82
5.6.180.0110.04117.61
5.6.170.0110.04817.59
5.6.160.0080.02517.72
5.6.150.0120.04117.74
5.6.140.0100.03817.71
5.6.130.0110.04017.75
5.6.120.0080.04317.80
5.6.110.0040.05217.76
5.6.100.0050.04017.81
5.6.90.0090.04917.72
5.6.80.0140.03717.37
5.6.70.0080.04417.33
5.6.60.0030.03517.39
5.6.50.0070.04217.29
5.6.40.0110.02317.31
5.6.30.0110.04017.31
5.6.20.0140.02817.32
5.6.10.0030.03117.43
5.6.00.0030.04517.37
5.5.380.0050.04617.31
5.5.370.0090.04117.39
5.5.360.0060.04517.54
5.5.350.0040.04917.34
5.5.340.0070.04017.49
5.5.330.0080.04617.69
5.5.320.0150.02517.58
5.5.310.0050.03717.69
5.5.300.0030.03017.65
5.5.290.0060.04717.61
5.5.280.0120.04317.52
5.5.270.0050.03417.51
5.5.260.0080.04217.60
5.5.250.0030.04717.22
5.5.240.0110.03817.15
5.5.230.0080.03417.31
5.5.220.0170.03717.17
5.5.210.0110.03717.18
5.5.200.0050.04517.23
5.5.190.0020.04517.41
5.5.180.0050.03017.31
5.5.170.0070.00713.86
5.5.160.0070.04617.36
5.5.150.0050.02717.27
5.5.140.0050.02517.15
5.5.130.0050.02717.07
5.5.120.0060.02617.37
5.5.110.0030.02617.35
5.5.100.0070.04117.15
5.5.90.0100.03717.25
5.5.80.0110.03317.32
5.5.70.0050.02917.28
5.5.60.0080.04317.29
5.5.50.0050.03817.12
5.5.40.0060.03517.19
5.5.30.0080.04517.12
5.5.20.0120.04517.24
5.5.10.0030.05117.23
5.5.00.0070.03017.22
5.4.450.0040.04615.22
5.4.440.0050.04315.26
5.4.430.0100.02515.09
5.4.420.0030.04115.38
5.4.410.0080.03315.08
5.4.400.0090.04015.18
5.4.390.0080.03715.11
5.4.380.0070.04115.19
5.4.370.0120.03715.12
5.4.360.0070.02315.22
5.4.350.0070.03315.14
5.4.340.0030.04215.09
5.4.330.0040.00811.19
5.4.320.0040.02615.10
5.4.310.0030.03215.12
5.4.300.0050.02915.13
5.4.290.0050.04115.19
5.4.280.0050.03315.09
5.4.270.0070.03914.99
5.4.260.0040.03115.23
5.4.250.0050.02615.19
5.4.240.0100.02015.08
5.4.230.0080.04015.22
5.4.220.0100.03814.93
5.4.210.0030.04514.99
5.4.200.0080.04615.18
5.4.190.0070.02615.00
5.4.180.0050.04215.21
5.4.170.0090.03515.10
5.4.160.0080.02815.30
5.4.150.0050.02414.97
5.4.140.0090.03513.72
5.4.130.0050.04013.67
5.4.120.0130.03013.75
5.4.110.0080.03913.81
5.4.100.0050.04313.98
5.4.90.0080.03813.87
5.4.80.0030.03613.94
5.4.70.0030.03813.91
5.4.60.0130.02213.72
5.4.50.0070.03213.73
5.4.40.0040.03913.72
5.4.30.0040.02513.82
5.4.20.0080.04113.77
5.4.10.0050.02213.74
5.4.00.0030.04113.43
5.3.290.0030.04512.67
5.3.280.0020.04212.45
5.3.270.0080.04112.72
5.3.260.0060.03912.68
5.3.250.0030.02812.68
5.3.240.0130.03312.58
5.3.230.0060.03412.63
5.3.220.0050.04312.45
5.3.210.0030.03512.67
5.3.200.0120.02212.53
5.3.190.0050.04412.64
5.3.180.0050.02312.63
5.3.170.0020.02312.60
5.3.160.0040.03112.71
5.3.150.0050.04012.74
5.3.140.0000.03012.44
5.3.130.0050.03012.60
5.3.120.0100.03812.46
5.3.110.0030.03712.52
5.3.100.0070.03312.42
5.3.90.0000.04112.47
5.3.80.0100.02812.27
5.3.70.0050.02412.28
5.3.60.0070.03812.25
5.3.50.0050.02612.31
5.3.40.0020.03012.18
5.3.30.0070.03912.33
5.3.20.0040.02712.07
5.3.10.0050.03711.95
5.3.00.0030.04011.96
5.2.170.0070.05711.02
5.2.160.0030.03311.22
5.2.150.0070.06311.24
5.2.140.0070.02711.27
5.2.130.0070.06311.18
5.2.120.0130.05311.17
5.2.110.0130.05711.03
5.2.100.0070.03011.02
5.2.90.0000.06311.02
5.2.80.0070.06711.16
5.2.70.0070.03311.17
5.2.60.0030.06011.13
5.2.50.0030.06311.13
5.2.40.0000.06311.04
5.2.30.0100.05711.01
5.2.20.0070.05710.93
5.2.10.0000.05710.88
5.2.00.0000.05310.75
5.1.60.0070.0509.84
5.1.50.0070.02710.11
5.1.40.0070.05010.02
5.1.30.0070.05710.34
5.1.20.0130.02010.46
5.1.10.0000.04010.14
5.1.00.0030.0309.96
5.0.50.0000.0578.83
5.0.40.0070.0278.83
5.0.30.0030.0638.83
5.0.20.0000.0508.83
5.0.10.0000.0378.83
5.0.00.0030.0638.83
4.4.90.0000.0308.83
4.4.80.0070.0278.83
4.4.70.0070.0208.83
4.4.60.0070.0308.83
4.4.50.0070.0238.83
4.4.40.0030.0578.83
4.4.30.0000.0378.83
4.4.20.0000.0208.83
4.4.10.0030.0238.83
4.4.00.0000.0478.83
4.3.110.0000.0378.83
4.3.100.0070.0338.83
4.3.90.0030.0338.83
4.3.80.0000.0578.83
4.3.70.0000.0378.83
4.3.60.0070.0238.83
4.3.50.0000.0308.83
4.3.40.0000.0408.83
4.3.30.0000.0408.83
4.3.20.0030.0338.83
4.3.10.0000.0338.83
4.3.00.0070.0278.83

preferences:
44.55 ms | 401 KiB | 5 Q