3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string)-1; $strLengthHalf = round(strlen($string) / 2); for ($i = 0; $i <= $strLengthHalf -$i; $i++) { $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$strLengthHalf - $i]; } var_dump($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)
8.3.60.0070.01418.43
8.3.50.0130.00821.21
8.3.40.0080.00818.89
8.3.30.0000.01519.20
8.3.20.0040.00420.46
8.3.10.0100.00723.61
8.3.00.0080.00019.26
8.2.180.0090.01216.50
8.2.170.0150.00622.96
8.2.160.0140.00019.24
8.2.150.0040.01624.18
8.2.140.0050.00224.66
8.2.130.0100.00726.16
8.2.120.0040.00422.36
8.2.110.0110.00021.00
8.2.100.0110.00418.16
8.2.90.0080.00019.09
8.2.80.0050.00517.97
8.2.70.0070.00317.75
8.2.60.0040.00418.05
8.2.50.0000.00818.10
8.2.40.0000.00820.13
8.2.30.0050.00318.18
8.2.20.0000.00717.71
8.2.10.0040.00418.23
8.2.00.0000.00817.86
8.1.280.0070.01125.92
8.1.270.0090.00622.18
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0090.00022.58
8.1.230.0030.00718.08
8.1.220.0060.00317.79
8.1.210.0000.00818.77
8.1.200.0030.00617.35
8.1.190.0040.00417.35
8.1.180.0000.00818.10
8.1.170.0000.00818.59
8.1.160.0000.00722.02
8.1.150.0040.00418.84
8.1.140.0040.00417.45
8.1.130.0030.00317.88
8.1.120.0000.00717.45
8.1.110.0050.00217.39
8.1.100.0000.00717.38
8.1.90.0000.00717.43
8.1.80.0000.00717.41
8.1.70.0070.00017.36
8.1.60.0080.00017.62
8.1.50.0030.00617.50
8.1.40.0000.00817.57
8.1.30.0040.00417.56
8.1.20.0030.00517.68
8.1.10.0000.00817.62
8.1.00.0070.00317.57
8.0.300.0040.00418.77
8.0.290.0070.00016.88
8.0.280.0050.00218.58
8.0.270.0030.00317.29
8.0.260.0060.00017.32
8.0.250.0000.00717.05
8.0.240.0070.00017.07
8.0.230.0030.00317.07
8.0.220.0000.00616.97
8.0.210.0030.00516.88
8.0.200.0000.00717.12
8.0.190.0000.00817.04
8.0.180.0040.00417.01
8.0.170.0080.00017.08
8.0.160.0000.00716.95
8.0.150.0000.00717.00
8.0.140.0080.00016.91
8.0.130.0030.00313.46
8.0.120.0040.00416.96
8.0.110.0040.00416.95
8.0.100.0080.00016.88
8.0.90.0040.00417.07
8.0.80.0120.00716.97
8.0.70.0050.00217.12
8.0.60.0000.00716.84
8.0.50.0040.00416.95
8.0.30.0100.01017.15
8.0.20.0110.00817.40
8.0.10.0060.00317.05
8.0.00.0030.01416.86
7.4.330.0050.00015.04
7.4.320.0050.00216.50
7.4.300.0030.00316.57
7.4.290.0070.00016.46
7.4.280.0030.00316.45
7.4.270.0040.00416.61
7.4.260.0000.00716.69
7.4.250.0050.00216.52
7.4.240.0040.00316.59
7.4.230.0000.00716.37
7.4.220.0040.01416.58
7.4.210.0090.00616.57
7.4.200.0000.00816.66
7.4.160.0060.00916.38
7.4.150.0150.01017.40
7.4.140.0100.01117.86
7.4.130.0050.01116.70
7.4.120.0120.00616.50
7.4.110.0140.01016.68
7.4.100.0080.00816.63
7.4.90.0190.00016.56
7.4.80.0130.01019.39
7.4.70.0080.00816.55
7.4.60.0130.00316.77
7.4.50.0000.00516.18
7.4.40.0110.00616.55
7.4.30.0030.01616.69
7.4.00.0140.00315.01
7.3.330.0000.00513.51
7.3.320.0050.00013.48
7.3.310.0000.00716.48
7.3.300.0070.00016.49
7.3.290.0070.00816.44
7.3.280.0120.00716.44
7.3.270.0110.01317.40
7.3.260.0160.00016.64
7.3.250.0020.01516.45
7.3.240.0170.00016.69
7.3.230.0060.01516.55
7.3.210.0170.00616.67
7.3.200.0130.00919.39
7.3.190.0060.01216.48
7.3.180.0040.01216.70
7.3.170.0050.01116.53
7.3.160.0090.00616.46
7.3.10.0030.01316.72
7.3.00.0040.00416.46
7.2.330.0100.01016.85
7.2.320.0160.00316.65
7.2.310.0070.01016.67
7.2.300.0130.00316.94
7.2.290.0040.01916.80
7.2.130.0090.00416.72
7.2.120.0040.00717.12
7.2.110.0100.00417.04
7.2.100.0030.00617.10
7.2.90.0070.00717.09
7.2.80.0030.00916.93
7.2.70.0120.00416.98
7.2.60.0070.00816.91
7.2.50.0000.01416.77
7.2.40.0110.00016.87
7.2.30.0060.00916.79
7.2.20.0040.01116.74
7.2.10.0130.00616.97
7.2.00.0050.00917.97
7.1.250.0030.00915.90
7.1.200.0110.00315.65
7.1.100.0030.00917.79
7.1.70.0030.00617.00
7.1.60.0030.02119.11
7.1.50.0110.01416.92
7.1.00.0030.07722.27
7.0.200.0060.00316.76
7.0.140.0030.07322.19
7.0.60.0100.07719.95
7.0.50.0070.08017.88
7.0.40.0070.08320.40
7.0.30.0270.06020.10
7.0.20.0270.08020.10
7.0.10.0030.06320.19
7.0.00.0030.06720.19
5.6.280.0000.07721.10
5.6.210.0100.05720.75
5.6.200.0070.03718.27
5.6.190.0070.07020.64
5.6.180.0230.05720.39
5.6.170.0300.06720.61
5.6.160.0070.07720.68
5.6.150.0000.07318.21
5.6.140.0000.07318.15
5.6.130.0100.05018.14
5.6.120.0100.05020.99
5.6.110.0070.08321.00
5.6.100.0170.07721.03
5.6.90.0030.07020.99
5.6.80.0100.03020.53
5.5.350.3900.04720.43
5.5.340.0030.08318.04
5.5.330.0170.07320.18
5.5.320.0230.06720.37
5.5.310.0270.04020.44
5.5.300.0100.07717.97
5.5.290.0030.09017.98
5.5.280.0130.07720.88
5.5.270.0070.06320.64
5.5.260.0070.06720.87
5.5.250.0100.07720.78
5.5.240.0100.07020.35
5.4.450.0970.06019.45
5.4.440.0970.05719.59
5.4.430.0770.06319.45
5.4.420.1130.07319.44
5.4.410.0700.05319.54
5.4.400.0700.06319.26
5.4.390.0530.06019.25
5.4.380.0130.05019.29
5.4.370.1000.06319.44
5.4.360.0170.05718.98
5.4.350.0800.05719.15
5.4.340.0120.07212.01
5.4.320.0130.05612.51
5.4.310.0070.04412.50
5.4.300.0080.04412.51
5.4.290.0080.05612.50
5.4.280.0090.06512.40
5.4.270.0060.04512.39
5.4.260.0060.04012.39
5.4.250.0130.03512.40
5.4.240.0120.03512.40
5.4.230.0080.04112.39
5.4.220.0090.04712.39
5.4.210.0210.08512.39
5.4.200.0240.07212.39
5.4.190.0150.04812.39
5.4.180.0080.04212.39
5.4.170.0080.04412.39
5.4.160.0130.03912.39
5.4.150.0140.05412.39
5.4.140.0090.07712.07
5.4.130.0110.04512.05
5.4.120.0100.04612.02
5.4.110.0100.04612.02
5.4.100.0200.08612.01
5.4.90.0100.04712.02
5.4.80.0110.04312.01
5.4.70.0090.04912.01
5.4.60.0060.04912.01
5.4.50.0050.05312.01
5.4.40.0130.04412.00
5.4.30.0110.06311.99
5.4.20.0110.05211.99
5.4.10.0070.03711.99
5.4.00.0040.06211.48
5.3.290.0160.05312.80
5.3.280.0060.04312.71
5.3.270.0060.04112.72
5.3.260.0060.04312.72
5.3.250.0060.04812.72
5.3.240.0060.05112.72
5.3.230.0090.04912.71
5.3.220.0180.07112.68
5.3.210.0100.03612.68
5.3.200.0100.03612.68
5.3.190.0060.03812.68
5.3.180.0100.05312.68
5.3.170.0070.05312.67
5.3.160.0080.04912.67
5.3.150.0050.04612.67
5.3.140.0060.03912.66
5.3.130.0050.04112.65
5.3.120.0110.05012.65
5.3.110.0120.08312.66
5.3.100.0090.04812.12
5.3.90.0030.04012.11
5.3.80.0090.03912.09
5.3.70.0090.03412.09
5.3.60.0040.03912.08
5.3.50.0060.03812.02
5.3.40.0070.04412.02
5.3.30.0120.04411.98
5.3.20.0090.04511.76
5.3.10.0080.04811.73
5.3.00.0070.04711.71
5.2.170.0080.0369.23
5.2.160.0040.0329.23
5.2.150.0040.0329.23
5.2.140.0090.0279.23
5.2.130.0100.0379.19
5.2.120.0090.0379.19
5.2.110.0060.0409.20
5.2.100.0040.0309.19
5.2.90.0070.0289.20
5.2.80.0030.0339.19
5.2.70.0070.0299.19
5.2.60.0050.0339.14
5.2.50.0050.0339.11
5.2.40.0040.0329.09
5.2.30.0070.0359.06
5.2.20.0020.0329.05
5.2.10.0080.0278.96
5.2.00.0010.0428.82
5.1.60.0040.0308.11
5.1.50.0070.0328.10
5.1.40.0110.0308.08
5.1.30.0060.0358.43
5.1.20.0050.0338.45
5.1.10.0040.0278.18
5.1.00.0030.0398.18
5.0.50.0040.0286.66
5.0.40.0070.0256.52
5.0.30.0050.0426.34
5.0.20.0030.0276.29
5.0.10.0030.0296.28
5.0.00.0020.0356.27
4.4.90.0020.0174.77
4.4.80.0070.0144.75
4.4.70.0060.0214.75
4.4.60.0050.0284.76
4.4.50.0030.0234.77
4.4.40.0050.0324.70
4.4.30.0000.0214.75
4.4.20.0040.0154.84
4.4.10.0090.0254.85
4.4.00.0030.0284.76
4.3.110.0020.0234.67
4.3.100.0030.0224.66
4.3.90.0070.0174.63
4.3.80.0030.0294.58
4.3.70.0030.0184.63
4.3.60.0030.0154.63
4.3.50.0000.0184.63
4.3.40.0030.0244.54
4.3.30.0050.0153.32
4.3.20.0030.0183.30
4.3.10.0060.0123.26
4.3.00.0200.0176.86

preferences:
32.4 ms | 401 KiB | 5 Q