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); var_dump($halfWord);exit; for($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)
8.3.60.0100.01018.55
8.3.50.0110.01122.13
8.3.40.0090.00918.99
8.3.30.0140.00419.18
8.3.20.0040.00420.47
8.3.10.0030.00521.89
8.3.00.0080.00019.28
8.2.180.0100.01025.92
8.2.170.0090.00618.91
8.2.160.0030.01020.39
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0080.00018.94
8.2.110.0090.00020.86
8.2.100.0040.00817.96
8.2.90.0000.00817.88
8.2.80.0030.00617.97
8.2.70.0000.00817.93
8.2.60.0060.00318.09
8.2.50.0060.00318.10
8.2.40.0060.00319.46
8.2.30.0100.00019.30
8.2.20.0050.00217.81
8.2.10.0000.00918.24
8.2.00.0000.00717.85
8.1.280.0110.00425.92
8.1.270.0040.00419.00
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0080.00317.48
8.1.230.0000.01117.76
8.1.220.0030.00617.77
8.1.210.0050.00518.77
8.1.200.0090.00017.48
8.1.190.0050.00317.48
8.1.180.0090.00018.10
8.1.170.0030.00618.68
8.1.160.0030.00618.93
8.1.150.0000.00718.96
8.1.140.0000.00717.55
8.1.130.0070.00017.80
8.1.120.0000.00717.55
8.1.110.0000.00817.55
8.1.100.0040.00317.45
8.1.90.0000.00717.51
8.1.80.0030.00517.49
8.1.70.0070.00017.55
8.1.60.0040.00417.66
8.1.50.0040.00417.63
8.1.40.0000.00817.50
8.1.30.0100.00017.59
8.1.20.0050.00317.66
8.1.10.0070.00317.59
8.1.00.0060.00317.50
8.0.300.0040.00418.77
8.0.290.0040.00416.88
8.0.280.0000.00718.42
8.0.270.0030.00317.35
8.0.260.0080.00017.35
8.0.250.0040.00417.13
8.0.240.0000.00717.13
8.0.230.0030.00317.12
8.0.220.0000.00717.08
8.0.210.0000.00817.02
8.0.200.0030.00616.93
8.0.190.0000.00716.97
8.0.180.0040.00416.96
8.0.170.0030.00617.08
8.0.160.0000.00716.95
8.0.150.0000.00716.95
8.0.140.0000.00817.00
8.0.130.0030.00313.44
8.0.120.0040.00416.95
8.0.110.0050.00216.94
8.0.100.0070.00016.84
8.0.90.0000.00717.00
8.0.80.0130.01017.02
8.0.70.0040.00416.88
8.0.60.0050.00317.05
8.0.50.0070.00016.88
8.0.30.0100.00817.00
8.0.20.0130.01017.40
8.0.10.0060.00317.04
8.0.00.0090.00816.77
7.4.330.0020.00215.14
7.4.320.0030.00316.71
7.4.300.0000.00616.67
7.4.290.0030.00316.56
7.4.280.0040.00416.49
7.4.270.0000.00716.58
7.4.260.0040.00416.65
7.4.250.0000.01016.63
7.4.240.0050.00216.55
7.4.230.0040.00316.67
7.4.220.0030.01516.71
7.4.210.0090.00616.52
7.4.200.0000.00716.69
7.4.160.0060.01216.70
7.4.150.0140.00517.40
7.4.140.0100.00717.86
7.4.130.0110.00816.60
7.4.120.0070.01116.61
7.4.110.0070.01116.66
7.4.100.0060.01616.48
7.4.90.0130.00316.57
7.4.80.0030.01316.58
7.4.70.0200.00316.64
7.4.60.0030.01616.88
7.4.50.0000.00816.54
7.4.40.0140.00316.51
7.4.30.0060.01116.66
7.4.00.0080.00615.20
7.3.330.0050.00013.21
7.3.320.0030.00313.50
7.3.310.0000.00616.30
7.3.300.0000.00616.41
7.3.290.0070.00716.41
7.3.280.0100.00716.41
7.3.270.0030.01517.40
7.3.260.0100.01016.45
7.3.250.0120.00516.63
7.3.240.0130.00316.49
7.3.230.0040.01216.60
7.3.210.0130.01016.46
7.3.200.0130.01019.39
7.3.190.0080.01116.51
7.3.180.0100.00716.48
7.3.170.0110.00416.56
7.3.160.0090.00616.57
7.3.120.0070.01314.84
7.3.110.0100.01014.91
7.3.100.0150.00014.88
7.3.90.0030.00614.71
7.3.80.0040.00414.75
7.3.70.0030.00915.02
7.3.60.0070.01014.73
7.3.50.0090.00014.92
7.3.40.0000.01314.96
7.3.30.0120.00314.88
7.3.20.0150.00016.66
7.3.10.0090.00316.86
7.3.00.0030.00616.42
7.2.330.0130.01016.54
7.2.320.0070.01016.67
7.2.310.0070.01416.79
7.2.300.0100.00716.68
7.2.290.0060.01616.90
7.2.250.0110.01015.30
7.2.240.0030.01515.30
7.2.230.0110.00315.29
7.2.220.0080.00314.70
7.2.210.0040.00815.19
7.2.200.0060.01014.98
7.2.190.0060.00914.69
7.2.180.0090.00615.20
7.2.170.0000.01015.01
7.2.60.0060.00917.02
7.2.00.0110.00819.15
7.1.330.0070.00715.86
7.1.320.0060.00615.82
7.1.310.0110.00015.85
7.1.300.0030.00615.62
7.1.290.0040.00815.82
7.1.280.0060.00615.82
7.1.270.0000.01415.84
7.1.260.0060.00615.93
7.1.200.0090.00615.72
7.1.100.0060.00617.94
7.1.70.0000.00717.20
7.1.60.0170.00719.57
7.1.50.0190.00034.73
7.1.00.0070.07322.27
7.0.200.0060.00316.76
7.0.140.0070.03021.97
7.0.60.0070.03719.89
7.0.50.0000.09017.83
7.0.40.0100.06720.30
7.0.30.0330.07720.25
7.0.20.0370.07020.23
7.0.10.0130.06720.35
7.0.00.0030.08020.12
5.6.280.0000.07721.10
5.6.210.0000.04320.54
5.6.200.0070.07718.18
5.6.190.0130.08720.33
5.6.180.0470.05320.61
5.6.170.0300.05020.44
5.6.160.0100.04720.53
5.6.150.0030.05018.15
5.6.140.0100.08018.17
5.6.130.0030.07718.14
5.6.120.0100.04721.02
5.6.110.0100.07721.14
5.6.100.0130.07721.14
5.6.90.0000.05320.99
5.6.80.0130.03020.38
5.5.350.0330.07020.38
5.5.340.0070.08317.95
5.5.330.0130.07320.57
5.5.320.0070.08020.26
5.5.310.0200.06020.24
5.5.300.0030.07718.06
5.5.290.0070.07717.94
5.5.280.0030.04020.74
5.5.270.0100.05720.89
5.5.260.0130.08320.84
5.5.250.0070.03720.66
5.5.240.0030.08020.17
5.4.450.0800.06019.48
5.4.440.0630.05019.66
5.4.430.0770.06719.34
5.4.420.0730.07019.59
5.4.410.0830.05319.20
5.4.400.1130.05019.43
5.4.390.0870.05019.33
5.4.380.0270.04018.45
5.4.370.0100.05718.79
5.4.360.0100.05318.59
5.4.350.0130.05318.86
5.4.340.0100.05718.57
5.4.320.0100.05718.79
5.4.310.0130.05318.48
5.4.300.0170.05018.84
5.4.290.0230.04318.48
5.4.280.0200.04718.80
5.4.270.0070.06318.74
5.4.260.0130.05318.77
5.4.250.0200.05018.77
5.4.240.0170.06018.83
5.4.230.0200.05018.79
5.4.220.0170.05018.79
5.4.210.0130.05718.55
5.4.200.0170.04716.66
5.4.190.0130.05318.72
5.4.180.0130.05718.77
5.4.170.0100.06018.84
5.4.160.0230.04718.49
5.4.150.0130.05718.72
5.4.140.0070.07016.44
5.4.130.0200.04016.35
5.4.120.0230.04316.46
5.4.110.0070.07016.21
5.4.100.0130.06016.27
5.4.90.0200.04316.26
5.4.80.0100.05316.28
5.4.70.0130.05716.43
5.4.60.0100.06016.26
5.4.50.0100.05016.18
5.4.40.0170.05016.21
5.4.30.0100.05716.39
5.4.20.0030.06316.18
5.4.10.0130.04716.20
5.4.00.0030.05715.66
5.3.290.0100.06014.71
5.3.280.0200.04714.80
5.3.270.0170.05314.66
5.3.260.0130.05714.70
5.3.250.0200.05314.77
5.3.240.0200.05014.63
5.3.230.0130.05314.78
5.3.220.0100.07014.61
5.3.210.0200.06014.73
5.3.200.0200.04714.78
5.3.190.0100.06314.68
5.3.180.0170.04714.60
5.3.170.0200.04314.72
5.3.160.0070.05714.62
5.3.150.0100.05314.70
5.3.140.0100.05314.60
5.3.130.0030.06314.71
5.3.120.0130.05314.60
5.3.110.0130.05314.54
5.3.100.0200.04314.04
5.3.90.0200.04314.02
5.3.80.0170.05314.26
5.3.70.0200.04314.12
5.3.60.0100.05014.05
5.3.50.0130.05014.12
5.3.40.0230.04013.98
5.3.30.0070.05713.93
5.3.20.0100.05313.74
5.3.10.0070.05313.78
5.3.00.0130.05013.66
5.2.170.0070.04711.14
5.2.160.0070.05011.27
5.2.150.0070.04311.19
5.2.140.0100.04011.34
5.2.130.0070.04311.30
5.2.120.0030.04711.15
5.2.110.0070.04311.23
5.2.100.0100.04011.14
5.2.90.0130.03711.22
5.2.80.0030.05011.23
5.2.70.0030.05011.20
5.2.60.0100.04311.27
5.2.50.0070.04311.14
5.2.40.0100.03711.02
5.2.30.0070.04311.02
5.2.20.0000.05010.97
5.2.10.0070.04010.90
5.2.00.0030.04310.72
5.1.60.0130.03010.18
5.1.50.0130.03010.10
5.1.40.0070.03310.02
5.1.30.0100.04310.39
5.1.20.0000.04310.46
5.1.10.0030.04010.07
5.1.00.0170.03010.11
5.0.50.0130.0238.59
5.0.40.0070.0278.55
5.0.30.0100.0408.43
5.0.20.0030.0308.25
5.0.10.0030.0308.23
5.0.00.0100.0378.21
4.4.90.0000.0275.90
4.4.80.0030.0235.90
4.4.70.0100.0175.91
4.4.60.0030.0236.01
4.4.50.0070.0235.94
4.4.40.0030.0375.94
4.4.30.0070.0205.94
4.4.20.0100.0176.05
4.4.10.0030.0235.97
4.4.00.0070.0336.06
4.3.110.0070.0205.85
4.3.100.0030.0235.86
4.3.90.0100.0135.79
4.3.80.0100.0305.86
4.3.70.0070.0205.85
4.3.60.0030.0235.82
4.3.50.0070.0205.80
4.3.40.0100.0305.79
4.3.30.0000.0305.09
4.3.20.0000.0235.09
4.3.10.0030.0235.09
4.3.00.0300.02715.15

preferences:
64.17 ms | 401 KiB | 5 Q