3v4l.org

run code in 300+ PHP versions simultaneously
<?php function makePalindrome($word) { $result = 0; $chars = str_split($word); $halfWord = round(count($chars)/2, 0, PHP_ROUND_HALF_DOWN); for($index = 0; $index >= $halfWord; $index++) { if($word != strrev($word)) { $mirrorCharPos = count($chars) - $index - 1; $mirrorChar = $chars[$mirrorCharPos]; if(isset($mirrorChar)) { $result += ord($mirrorChar) - ord($char); $chars[$mirrorCharPos] = $char; } $word = join('', $chars); }else{ break; } } return $result; } $wordToTest1 = 'aaa'; echo 'test1: ' . makePalindrome($wordToTest1) . PHP_EOL; $wordToTest2 = 'abc'; echo 'test2: ' . makePalindrome($wordToTest2) . PHP_EOL; $wordToTest3 = 'abcde'; echo 'test3: ' . makePalindrome($wordToTest3) . PHP_EOL;

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)
8.3.60.0140.00718.43
8.3.50.0110.00922.04
8.3.40.0060.01218.54
8.3.30.0100.00719.04
8.3.20.0000.00720.16
8.3.10.0040.00422.04
8.3.00.0040.00419.22
8.2.180.0120.00318.53
8.2.170.0120.00322.96
8.2.160.0110.00720.31
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0050.00326.16
8.2.120.0040.00419.66
8.2.110.0030.00719.43
8.2.100.0080.00417.91
8.2.90.0040.00417.91
8.2.80.0000.00818.05
8.2.70.0040.00418.16
8.2.60.0030.00618.16
8.2.50.0080.00018.10
8.2.40.0050.00219.29
8.2.30.0070.00019.27
8.2.20.0020.00517.67
8.2.10.0030.00618.06
8.2.00.0030.00617.86
8.1.280.0130.00325.92
8.1.270.0040.00418.92
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0060.00319.13
8.1.230.0090.00321.04
8.1.220.0040.00417.83
8.1.210.0080.00018.98
8.1.200.0070.00317.38
8.1.190.0000.00817.35
8.1.180.0080.00018.10
8.1.170.0000.00818.63
8.1.160.0000.00718.88
8.1.150.0070.00018.81
8.1.140.0040.00417.52
8.1.130.0040.00417.88
8.1.120.0070.00017.54
8.1.110.0000.00717.44
8.1.100.0050.00217.52
8.1.90.0030.00517.42
8.1.80.0040.00417.56
8.1.70.0000.00717.50
8.1.60.0000.00817.64
8.1.50.0040.00417.63
8.1.40.0040.00417.58
8.1.30.0030.00917.70
8.1.20.0070.00017.65
8.1.10.0040.00417.53
8.1.00.0030.00517.40
8.0.300.0040.00420.09
8.0.290.0040.00416.88
8.0.280.0070.00018.52
8.0.270.0000.00717.31
8.0.260.0030.00317.23
8.0.250.0030.00317.00
8.0.240.0070.00017.04
8.0.230.0000.00716.92
8.0.220.0000.00716.83
8.0.210.0030.00316.95
8.0.200.0060.00316.99
8.0.190.0040.00417.10
8.0.180.0030.00517.04
8.0.170.0030.00617.02
8.0.160.0060.00316.92
8.0.150.0040.00416.84
8.0.140.0040.00416.84
8.0.130.0050.00013.42
8.0.120.0000.00816.89
8.0.110.0040.00416.83
8.0.100.0040.00416.76
8.0.90.0000.00816.99
8.0.80.0120.00917.01
8.0.70.0050.00317.07
8.0.60.0040.00416.78
8.0.50.0070.00017.04
8.0.30.0100.00817.23
8.0.20.0110.00817.40
8.0.10.0000.00816.96
8.0.00.0120.00716.89
7.4.330.0050.00015.10
7.4.320.0030.00316.48
7.4.300.0040.00416.71
7.4.290.0070.00016.53
7.4.280.0050.00316.63
7.4.270.0000.00716.57
7.4.260.0020.00516.67
7.4.250.0060.00316.43
7.4.240.0030.00416.67
7.4.230.0000.00716.53
7.4.220.0070.01016.48
7.4.210.0130.00316.67
7.4.200.0000.00716.48
7.4.160.0090.01316.50
7.4.150.0140.00417.40
7.4.140.0090.00817.86
7.4.130.0100.00916.57
7.4.120.0080.00916.59
7.4.110.0030.01416.68
7.4.100.0120.00916.63
7.4.90.0100.00716.54
7.4.80.0140.00316.45
7.4.70.0140.01016.43
7.4.60.0130.00316.63
7.4.50.0000.00816.41
7.4.40.0070.01016.39
7.4.30.0130.00316.55
7.4.00.0100.00615.20
7.3.330.0020.00213.18
7.3.320.0040.00413.23
7.3.310.0040.00416.36
7.3.300.0000.00716.36
7.3.290.0100.00716.36
7.3.280.0110.00716.30
7.3.270.0090.00917.40
7.3.260.0070.01416.45
7.3.250.0080.01016.59
7.3.240.0120.00616.43
7.3.230.0120.00416.44
7.3.210.0120.00916.46
7.3.200.0030.01419.39
7.3.190.0090.00616.68
7.3.180.0040.01216.34
7.3.170.0120.00916.34
7.3.160.0080.00816.42
7.3.120.0110.00014.97
7.3.110.0040.01114.93
7.3.100.0110.00714.92
7.3.90.0130.00314.82
7.3.80.0000.00914.50
7.3.70.0090.00314.69
7.3.60.0050.00814.95
7.3.50.0090.00614.70
7.3.40.0080.00314.82
7.3.30.0000.00914.84
7.3.20.0030.00716.71
7.3.10.0080.00516.32
7.3.00.0100.00616.64
7.2.330.0130.01016.89
7.2.320.0140.00316.88
7.2.310.0130.00316.88
7.2.300.0040.01616.91
7.2.290.0030.01416.62
7.2.240.0070.00715.38
7.2.230.0030.01214.96
7.2.220.0100.00715.06
7.2.210.0060.00915.00
7.2.200.0030.00915.16
7.2.190.0090.00315.13
7.2.180.0090.00015.11
7.2.170.0100.00315.02
7.2.160.0030.00615.22
7.2.150.0080.00316.77
7.2.140.0060.01216.74
7.2.130.0110.00316.86
7.2.120.0070.00916.67
7.2.110.0090.00916.84
7.2.100.0080.00616.64
7.2.90.0100.00516.75
7.2.80.0180.00616.87
7.2.70.0030.01016.62
7.2.60.0110.00516.61
7.2.50.0150.00816.83
7.2.40.0230.00817.02
7.2.30.0080.00816.95
7.2.20.0080.00616.85
7.2.10.0120.00416.63
7.2.00.0080.00917.69
7.1.330.0030.00915.77
7.1.320.0000.01415.87
7.1.310.0090.00315.78
7.1.300.0090.00315.81
7.1.290.0090.00615.63
7.1.280.0060.00615.66
7.1.270.0090.00615.81
7.1.260.0070.00415.88
7.1.250.0040.00915.83
7.1.100.0060.00618.27
7.1.70.0000.00817.16
7.1.60.0140.01019.57
7.1.50.0270.00934.84
7.1.00.0030.07722.31
7.0.200.0070.00016.57
7.0.140.0000.07722.22
7.0.60.0230.06719.86
7.0.50.0030.08717.75
7.0.40.0070.04320.05
7.0.30.0370.07020.33
7.0.20.0270.05020.07
7.0.10.0000.04720.20
7.0.00.0070.04020.09
5.6.280.0100.06321.16
5.6.210.0170.05020.51
5.6.200.0130.04018.18
5.6.190.0030.05020.77
5.6.180.2530.04020.48
5.6.170.0230.06020.54
5.6.160.0100.03720.48
5.6.150.0100.06318.15
5.6.140.0100.05018.27
5.6.130.0030.06318.12
5.6.120.0130.07021.05
5.6.110.0030.08321.14
5.6.100.0030.08021.11
5.6.90.0100.06721.01
5.6.80.0230.06720.38
5.6.70.4330.04020.53
5.5.350.0400.06020.41
5.5.340.0030.08017.94
5.5.330.0030.04320.57
5.5.320.0230.04720.25
5.5.310.0200.08720.24
5.5.300.0030.07717.98
5.5.290.0100.06717.95
5.5.280.0030.04320.73
5.5.270.0070.06720.98
5.5.260.0000.04720.89
5.5.250.0030.04020.71
5.5.240.0170.07320.24
5.4.450.0570.06319.20
5.4.440.0700.05719.66
5.4.430.0930.05719.61
5.4.420.0970.05319.42
5.4.410.0930.05719.02
5.4.400.0930.05019.27
5.4.390.0770.06019.13
5.4.380.0100.06018.80
5.4.370.0200.04718.85
5.4.360.0130.05318.78
5.4.350.0170.05018.73
5.4.340.0170.05318.52
5.4.320.0170.05318.61
5.4.310.0200.04718.48
5.4.300.0230.05718.63
5.4.290.0130.05018.57
5.4.280.0200.04718.75
5.4.270.0170.05018.79
5.4.260.0230.04318.75
5.4.250.0070.07018.84
5.4.240.0130.05718.79
5.4.230.0030.06018.50
5.4.220.0170.05318.47
5.4.210.0130.05318.55
5.4.200.0270.04316.70
5.4.190.0030.06318.50
5.4.180.0130.05318.58
5.4.170.0170.05318.57
5.4.160.0130.05318.70
5.4.150.0230.06318.55
5.4.140.0130.05716.27
5.4.130.0100.05316.22
5.4.120.0200.04016.32
5.4.110.0130.04716.32
5.4.100.0070.05716.18
5.4.90.0130.05016.34
5.4.80.0070.05316.30
5.4.70.0130.05016.27
5.4.60.0170.04716.39
5.4.50.0230.04016.20
5.4.40.0030.06016.18
5.4.30.0170.04716.19
5.4.20.0230.04716.20
5.4.10.0170.06016.27
5.4.00.0130.05015.66
5.3.290.0030.06714.87
5.3.280.0130.05314.78
5.3.270.0070.06014.73
5.3.260.0170.05014.63
5.3.250.0100.05314.66
5.3.240.0200.04714.70
5.3.230.0200.04714.77
5.3.220.0100.05314.62
5.3.210.0130.07314.62
5.3.200.0200.04714.62
5.3.190.0170.05014.61
5.3.180.0130.05014.69
5.3.170.0100.05714.58
5.3.160.0100.05314.61
5.3.150.0200.04314.75
5.3.140.0100.05714.60
5.3.130.0030.06314.71
5.3.120.0130.05314.60
5.3.110.0030.06314.68
5.3.100.0170.04714.03
5.3.90.0130.05014.07
5.3.80.0200.04314.04
5.3.70.0170.05014.18
5.3.60.0170.04714.13
5.3.50.0200.05014.16
5.3.40.0170.04714.05
5.3.30.0100.05314.12
5.3.20.0130.05013.91
5.3.10.0230.06013.78
5.3.00.0170.04713.64
5.2.170.0170.04011.25
5.2.160.0070.04311.21
5.2.150.0000.05011.25
5.2.140.0100.04711.14
5.2.130.0100.04311.32
5.2.120.0100.04311.10
5.2.110.0070.04311.12
5.2.100.0230.02711.11
5.2.90.0100.04311.13
5.2.80.0070.04311.14
5.2.70.0270.03311.23
5.2.60.0100.05011.06
5.2.50.0070.04311.05
5.2.40.0130.03711.03
5.2.30.0100.04011.02
5.2.20.0070.04311.06
5.2.10.0070.04011.07
5.2.00.0170.03310.74
5.1.60.0170.02710.18
5.1.50.0030.04010.04
5.1.40.0070.03710.02
5.1.30.0100.03310.39
5.1.20.0100.03710.48
5.1.10.0130.03010.18
5.1.00.0130.03010.26
5.0.50.0000.0338.59
5.0.40.0100.0238.52
5.0.30.0030.0478.22
5.0.20.0030.0308.32
5.0.10.0030.0308.39
5.0.00.0000.0478.36
4.4.90.0070.0205.91
4.4.80.0070.0205.88
4.4.70.0100.0175.91
4.4.60.0070.0205.94
4.4.50.0070.0206.02
4.4.40.0100.0305.95
4.4.30.0030.0205.92
4.4.20.0070.0206.05
4.4.10.0100.0176.05
4.4.00.0070.0335.97
4.3.110.0030.0235.84
4.3.100.0070.0205.91
4.3.90.0070.0205.80
4.3.80.0000.0375.80
4.3.70.0030.0235.82
4.3.60.0070.0175.84
4.3.50.0030.0235.83
4.3.40.0000.0375.81
4.3.30.0070.0175.10
4.3.20.0070.0205.10
4.3.10.0030.0205.10
4.3.00.0070.01715.15

preferences:
55.37 ms | 401 KiB | 5 Q