3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round(strlen($string) / 2); var_dump($strLength); var_dump($strLengthHalf); for ($i = 0; $i < round(strlen($string)/ 2) - 1; $i++) { $substr1 .= $string[$strLength-$i]; $substr2 .= $string[round(strlen($string)/ 2) - $i]; } var_dump($substr1); var_dump($substr2); return $string = $substr1.$substr2; } var_dump(reverse('12345'));

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)
8.3.60.0070.00718.30
8.3.50.0170.00522.04
8.3.40.0030.01319.09
8.3.30.0140.00019.26
8.3.20.0030.00620.25
8.3.10.0000.00823.83
8.3.00.0000.01519.50
8.2.180.0080.00816.63
8.2.170.0070.00722.96
8.2.160.0150.00620.53
8.2.150.0030.00524.18
8.2.140.0050.00324.66
8.2.130.0070.00026.16
8.2.120.0050.00322.05
8.2.110.0030.00620.61
8.2.100.0060.00618.22
8.2.90.0000.00819.20
8.2.80.0000.00817.97
8.2.70.0000.00917.73
8.2.60.0070.00018.03
8.2.50.0040.00418.07
8.2.40.0060.00320.07
8.2.30.0040.00418.24
8.2.20.0030.00517.78
8.2.10.0080.00018.05
8.2.00.0040.00417.80
8.1.280.0000.01425.92
8.1.270.0050.00322.27
8.1.260.0040.00426.35
8.1.250.0030.00528.09
8.1.240.0040.00423.91
8.1.230.0060.00619.15
8.1.220.0000.00817.77
8.1.210.0040.00418.77
8.1.200.0060.00317.13
8.1.190.0060.00317.35
8.1.180.0040.00418.10
8.1.170.0000.00818.55
8.1.160.0030.00522.01
8.1.150.0000.00718.88
8.1.140.0040.00417.44
8.1.130.0030.00317.88
8.1.120.0040.00417.49
8.1.110.0040.00417.39
8.1.100.0050.00317.49
8.1.90.0070.00017.39
8.1.80.0000.00717.38
8.1.70.0000.00717.42
8.1.60.0000.00817.68
8.1.50.0090.00017.47
8.1.40.0040.00417.59
8.1.30.0040.00417.75
8.1.20.0020.00517.73
8.1.10.0040.00417.60
8.1.00.0000.00817.53
8.0.300.0070.00018.77
8.0.290.0040.00416.88
8.0.280.0000.00718.37
8.0.270.0070.00017.39
8.0.260.0050.00217.18
8.0.250.0030.00317.01
8.0.240.0000.00716.99
8.0.230.0000.00717.08
8.0.220.0000.00617.02
8.0.210.0070.00016.97
8.0.200.0070.00016.90
8.0.190.0050.00317.12
8.0.180.0000.00717.04
8.0.170.0000.00716.99
8.0.160.0040.00416.89
8.0.150.0020.00517.02
8.0.140.0050.00216.85
8.0.130.0000.00613.42
8.0.120.0040.00416.98
8.0.110.0040.00417.07
8.0.100.0000.00716.80
8.0.90.0000.00817.00
8.0.80.0070.01016.94
8.0.70.0080.00016.84
8.0.60.0000.00716.95
8.0.50.0040.00416.84
8.0.30.0080.01017.02
8.0.20.0100.00917.43
8.0.10.0050.00217.03
8.0.00.0070.01116.88
7.4.330.0000.00515.02
7.4.320.0090.00016.41
7.4.300.0000.00616.66
7.4.290.0000.00616.69
7.4.280.0030.00316.64
7.4.270.0040.00416.42
7.4.260.0000.00916.61
7.4.250.0040.00416.51
7.4.240.0060.00216.63
7.4.230.0050.00316.47
7.4.220.0040.01516.48
7.4.210.0040.01116.43
7.4.200.0000.00716.68
7.4.160.0140.00716.71
7.4.150.0090.01217.40
7.4.140.0150.00617.86
7.4.130.0110.00616.53
7.4.120.0090.01116.64
7.4.110.0100.01316.66
7.4.100.0080.00816.70
7.4.90.0150.00416.77
7.4.80.0100.01319.39
7.4.70.0070.01316.59
7.4.60.0110.00716.45
7.4.50.0000.00416.41
7.4.40.0070.01016.74
7.4.30.0120.00616.61
7.4.00.0070.01015.13
7.3.330.0000.00613.31
7.3.320.0050.00013.52
7.3.310.0030.00316.64
7.3.300.0000.00716.50
7.3.290.0040.00916.46
7.3.280.0100.00516.42
7.3.270.0080.01217.40
7.3.260.0070.01716.42
7.3.250.0080.00816.65
7.3.240.0150.00316.50
7.3.230.0090.00816.53
7.3.210.0100.01016.57
7.3.200.0070.01019.39
7.3.190.0080.00816.42
7.3.180.0070.01016.72
7.3.170.0090.01316.61
7.3.160.0120.00316.57
7.3.120.0070.01115.11
7.3.110.0140.00315.05
7.3.100.0070.00714.99
7.3.90.0000.01414.74
7.3.80.0040.01114.70
7.3.70.0040.00814.97
7.3.60.0000.01114.77
7.3.50.0060.01014.89
7.3.40.0040.01214.91
7.3.30.0000.01314.95
7.3.20.0100.00316.71
7.3.10.0060.00916.54
7.3.00.0060.00916.81
7.2.330.0090.00916.67
7.2.320.0090.00916.79
7.2.310.0060.01116.81
7.2.300.0160.00016.93
7.2.290.0090.01416.90
7.2.250.0130.00615.04
7.2.240.0140.00715.41
7.2.230.0110.00415.24
7.2.220.0100.00315.06
7.2.210.0000.01615.17
7.2.200.0070.01015.07
7.2.190.0070.01015.05
7.2.180.0030.01014.88
7.2.170.0000.01614.79
7.2.80.0100.00316.73
7.2.00.0050.00519.36
7.1.330.0060.00915.93
7.1.320.0030.01015.71
7.1.310.0070.01015.96
7.1.300.0110.00015.58
7.1.290.0030.01015.77
7.1.280.0100.00715.90
7.1.270.0060.00915.89
7.1.260.0070.00315.85
7.1.200.0060.00615.81
7.1.100.0030.00917.89
7.1.70.0000.00817.18
7.1.60.0030.02119.11
7.1.50.0130.01016.69
7.1.00.0070.07322.45
7.0.200.0000.00816.77
7.0.140.0100.06721.90
7.0.60.0230.06320.05
7.0.50.0030.04717.82
7.0.40.0070.09020.02
7.0.30.0200.06020.16
7.0.20.0130.04720.15
7.0.10.0100.03720.23
7.0.00.0030.05020.25
5.6.280.0070.07021.12
5.6.210.0030.08320.75
5.6.200.0130.06718.16
5.6.190.0100.08020.42
5.6.180.0370.06320.41
5.6.170.0200.04020.44
5.6.160.0170.07320.68
5.6.150.0070.03718.19
5.6.140.0030.04018.14
5.6.130.0070.07718.17
5.6.120.0000.06321.00
5.6.110.0170.07321.02
5.6.100.0200.07020.99
5.6.90.0100.04021.01
5.6.80.0030.06320.51
5.6.70.4470.04020.37
5.5.350.0130.07020.33
5.5.340.0000.04318.08
5.5.330.0030.09020.46
5.5.320.0300.07720.48
5.5.310.0300.06320.35
5.5.300.0030.04318.08
5.5.290.0030.07717.95
5.5.280.0030.07320.76
5.5.270.0100.05720.95
5.5.260.0100.07720.86
5.5.250.0070.07320.55
5.5.240.0300.07020.19
5.4.450.0770.05319.31
5.4.440.0930.07319.67
5.4.430.0800.06319.46
5.4.420.0930.06019.47
5.4.410.0900.06019.34
5.4.400.0870.06718.89
5.4.390.0800.06019.15
5.4.380.0700.05019.13
5.4.370.0700.04719.12
5.4.360.0170.07018.98
5.4.350.0830.06018.83
5.4.340.0050.03612.02
5.4.320.0040.04212.51
5.4.310.0090.03812.51
5.4.300.0040.03912.51
5.4.290.0110.03312.51
5.4.280.0080.03412.40
5.4.270.0030.04012.40
5.4.260.0060.03812.41
5.4.250.0040.03912.41
5.4.240.0070.03612.40
5.4.230.0070.03612.39
5.4.220.0080.03412.39
5.4.210.0080.03312.40
5.4.200.0060.04312.39
5.4.190.0060.04112.39
5.4.180.0070.03712.39
5.4.170.0130.03312.40
5.4.160.0100.03312.39
5.4.150.0070.03512.39
5.4.140.0060.03712.07
5.4.130.0050.03712.06
5.4.120.0060.03512.02
5.4.110.0060.03712.02
5.4.100.0050.03812.02
5.4.90.0060.03712.02
5.4.80.0080.03412.02
5.4.70.0060.03412.01
5.4.60.0080.04212.02
5.4.50.0060.04612.01
5.4.40.0090.03312.00
5.4.30.0080.03412.00
5.4.20.0050.05012.00
5.4.10.0060.04112.00
5.4.00.0110.04511.49
5.3.290.0100.05012.80
5.3.280.0050.05112.71
5.3.270.0060.04012.72
5.3.260.0050.04112.72
5.3.250.0080.04312.72
5.3.240.0080.05212.72
5.3.230.0160.03912.71
5.3.220.0060.06012.68
5.3.210.0120.05612.68
5.3.200.0080.05212.68
5.3.190.0090.05412.68
5.3.180.0110.03912.67
5.3.170.0070.03812.67
5.3.160.0130.04412.68
5.3.150.0100.03612.67
5.3.140.0080.03612.66
5.3.130.0070.03912.65
5.3.120.0050.04112.66
5.3.110.0180.04512.66
5.3.100.0120.04712.12
5.3.90.0120.03812.11
5.3.80.0080.04112.10
5.3.70.0080.03412.10
5.3.60.0070.03612.08
5.3.50.0070.03512.02
5.3.40.0080.03412.02
5.3.30.0080.04111.98
5.3.20.0060.03511.77
5.3.10.0070.03411.73
5.3.00.0070.04211.72
5.2.170.0070.0319.24
5.2.160.0040.0329.24
5.2.150.0050.0309.23
5.2.140.0040.0319.23
5.2.130.0070.0399.19
5.2.120.0110.0439.19
5.2.110.0080.0389.20
5.2.100.0060.0309.20
5.2.90.0050.0299.20
5.2.80.0050.0319.19
5.2.70.0040.0329.20
5.2.60.0060.0299.15
5.2.50.0040.0309.12
5.2.40.0030.0309.09
5.2.30.0060.0289.07
5.2.20.0090.0249.06
5.2.10.0070.0258.96
5.2.00.0040.0308.83
5.1.60.0050.0238.11
5.1.50.0040.0248.11
5.1.40.0020.0268.08
5.1.30.0030.0278.43
5.1.20.0040.0278.45
5.1.10.0050.0258.18
5.1.00.0030.0278.19
5.0.50.0020.0226.68
5.0.40.0050.0236.54
5.0.30.0030.0366.34
5.0.20.0040.0196.32
5.0.10.0050.0196.29
5.0.00.0040.0306.28
4.4.90.0020.0164.78
4.4.80.0070.0114.75
4.4.70.0040.0144.76
4.4.60.0000.0224.75
4.4.50.0060.0124.77
4.4.40.0040.0244.71
4.4.30.0040.0144.75
4.4.20.0050.0134.85
4.4.10.0040.0144.85
4.4.00.0040.0254.76
4.3.110.0040.0144.67
4.3.100.0010.0174.66
4.3.90.0010.0214.64
4.3.80.0030.0284.58
4.3.70.0030.0144.63
4.3.60.0020.0164.63
4.3.50.0020.0174.62
4.3.40.0020.0264.54
4.3.30.0050.0143.34
4.3.20.0020.0183.31
4.3.10.0000.0183.27
4.3.00.0170.0276.75

preferences:
50.68 ms | 401 KiB | 5 Q