3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round(strlen($string) / 2) - 1; for ($i = 0; $i < $strLengthHalf ; $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)
8.3.60.0120.00318.55
8.3.50.0140.00721.06
8.3.40.0080.00818.84
8.3.30.0140.00019.17
8.3.20.0050.00320.29
8.3.10.0060.00323.79
8.3.00.0060.00319.51
8.2.180.0070.00718.62
8.2.170.0190.00322.96
8.2.160.0130.00620.47
8.2.150.0110.00424.18
8.2.140.0000.00724.66
8.2.130.0000.00826.16
8.2.120.0070.00722.23
8.2.110.0030.00620.65
8.2.100.0080.00418.03
8.2.90.0040.00419.34
8.2.80.0030.00617.97
8.2.70.0050.00517.63
8.2.60.0040.00418.03
8.2.50.0030.00518.07
8.2.40.0080.00020.01
8.2.30.0000.00718.16
8.2.20.0030.00517.90
8.2.10.0040.00418.20
8.2.00.0030.00617.89
8.1.280.0110.00425.92
8.1.270.0090.00022.17
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0090.00322.16
8.1.230.0030.01023.82
8.1.220.0060.00317.74
8.1.210.0080.00018.77
8.1.200.0060.00317.36
8.1.190.0000.00817.25
8.1.180.0070.00018.10
8.1.170.0000.00818.46
8.1.160.0040.00422.05
8.1.150.0000.00818.82
8.1.140.0000.00717.35
8.1.130.0070.00017.76
8.1.120.0030.00517.47
8.1.110.0050.00217.34
8.1.100.0040.00417.51
8.1.90.0000.00817.50
8.1.80.0050.00217.51
8.1.70.0030.00317.45
8.1.60.0030.00617.54
8.1.50.0030.00617.63
8.1.40.0030.00617.45
8.1.30.0000.00817.71
8.1.20.0050.00317.54
8.1.10.0000.00817.59
8.1.00.0040.00417.55
8.0.300.0020.00518.77
8.0.290.0000.00916.88
8.0.280.0030.00318.36
8.0.270.0030.00317.30
8.0.260.0040.00418.41
8.0.250.0030.00317.08
8.0.240.0030.00317.08
8.0.230.0000.00717.04
8.0.220.0070.00016.86
8.0.210.0000.00716.89
8.0.200.0000.00717.06
8.0.190.0000.00816.96
8.0.180.0050.00217.02
8.0.170.0030.00517.00
8.0.160.0040.00416.99
8.0.150.0040.00416.86
8.0.140.0050.00216.95
8.0.130.0050.00013.44
8.0.120.0000.00817.01
8.0.110.0040.00417.04
8.0.100.0000.00717.02
8.0.90.0000.00717.05
8.0.80.0210.00317.06
8.0.70.0040.00417.07
8.0.60.0000.00716.92
8.0.50.0070.00017.02
8.0.30.0150.00517.01
8.0.20.0080.01017.40
8.0.10.0000.00717.13
8.0.00.0090.00916.74
7.4.330.0050.00015.02
7.4.320.0040.00416.48
7.4.300.0000.00616.58
7.4.290.0030.00516.55
7.4.280.0030.00316.55
7.4.270.0030.00316.49
7.4.260.0080.00016.59
7.4.250.0050.00216.43
7.4.240.0050.00216.57
7.4.230.0000.00716.47
7.4.220.0090.01016.69
7.4.210.0090.00916.64
7.4.200.0000.00816.73
7.4.160.0130.00316.57
7.4.150.0090.00917.40
7.4.140.0110.00817.86
7.4.130.0080.01016.58
7.4.120.0120.00616.59
7.4.110.0090.01216.63
7.4.100.0000.01616.70
7.4.90.0070.01016.74
7.4.80.0050.01119.39
7.4.70.0130.00516.66
7.4.60.0070.01116.67
7.4.50.0040.00416.40
7.4.40.0100.00716.58
7.4.30.0100.00816.63
7.4.00.0030.01314.75
7.3.330.0030.00313.25
7.3.320.0050.00013.30
7.3.310.0030.00316.34
7.3.300.0030.00316.47
7.3.290.0080.00716.50
7.3.280.0070.00816.46
7.3.270.0110.00717.40
7.3.260.0120.00416.45
7.3.250.0120.00516.48
7.3.240.0140.00416.49
7.3.230.0160.00316.39
7.3.210.0060.01116.42
7.3.200.0070.01319.39
7.3.190.0090.00816.69
7.3.180.0120.00916.55
7.3.170.0070.01716.73
7.3.160.0100.00516.60
7.2.330.0170.00716.49
7.2.320.0040.02216.86
7.2.310.0090.01216.83
7.2.300.0100.00716.78
7.2.290.0110.00716.89
7.2.60.0070.00017.20
7.1.200.0030.01015.77
7.1.100.0060.00918.11
7.1.70.0070.00017.28
7.1.60.0030.02019.11
7.1.50.0060.01917.01
7.1.00.0030.07722.40
7.0.200.0060.00316.67
7.0.140.0000.07722.23
7.0.60.0070.04321.72
7.0.50.0100.08317.84
7.0.40.0170.06019.96
7.0.30.0330.07720.07
7.0.20.0200.04720.21
7.0.10.0030.04320.26
7.0.00.0130.07320.25
5.6.280.0070.06721.05
5.6.210.0030.04020.61
5.6.200.0100.06018.18
5.6.190.0030.05720.77
5.6.180.0230.06720.48
5.6.170.0230.08020.48
5.6.160.0030.05320.60
5.6.150.0030.08318.18
5.6.140.0070.08718.15
5.6.130.0100.08318.24
5.6.120.0030.04721.12
5.6.110.0130.07021.14
5.6.100.0100.08020.97
5.6.90.0200.07020.97
5.6.80.0070.08020.50
5.5.350.0300.07020.34
5.5.340.0070.07018.03
5.5.330.0030.05320.43
5.5.320.0400.07720.27
5.5.310.0300.07320.41
5.5.300.0100.04717.95
5.5.290.0070.08317.99
5.5.280.0130.07720.89
5.5.270.0000.04320.87
5.5.260.0070.06720.80
5.5.250.0070.05320.62
5.5.240.0130.07720.16
5.4.450.0870.06319.62
5.4.440.1000.04719.16
5.4.430.0770.05719.34
5.4.420.0770.04319.45
5.4.410.1230.07019.07
5.4.400.0070.07019.29
5.4.390.0670.05719.45
5.4.380.0730.05319.13
5.4.370.0700.06019.13
5.4.360.0070.05719.15
5.4.350.0930.05319.30
5.4.340.0060.04212.02
5.4.320.0070.03712.50
5.4.310.0060.03812.50
5.4.300.0080.04312.50
5.4.290.0080.04212.50
5.4.280.0080.04612.40
5.4.270.0100.03712.39
5.4.260.0030.04112.40
5.4.250.0050.03812.40
5.4.240.0050.03712.40
5.4.230.0060.04012.39
5.4.220.0050.03812.39
5.4.210.0050.03712.39
5.4.200.0060.04012.39
5.4.190.0080.03912.39
5.4.180.0050.03712.39
5.4.170.0080.03512.39
5.4.160.0080.03512.39
5.4.150.0040.03912.39
5.4.140.0060.03812.07
5.4.130.0060.03612.06
5.4.120.0090.03912.02
5.4.110.0060.04112.01
5.4.100.0020.04012.02
5.4.90.0080.03612.01
5.4.80.0050.03912.01
5.4.70.0060.04112.01
5.4.60.0090.04712.01
5.4.50.0050.03912.01
5.4.40.0070.04612.00
5.4.30.0060.04811.99
5.4.20.0140.04512.00
5.4.10.0080.05411.99
5.4.00.0090.04811.48
5.3.290.0110.05012.80
5.3.280.0100.04012.71
5.3.270.0080.04812.73
5.3.260.0100.04112.72
5.3.250.0130.04712.72
5.3.240.0060.04012.72
5.3.230.0040.04612.71
5.3.220.0060.03912.68
5.3.210.0110.04112.68
5.3.200.0060.04012.68
5.3.190.0050.04112.68
5.3.180.0140.03912.67
5.3.170.0050.04912.67
5.3.160.0080.03712.67
5.3.150.0100.03712.67
5.3.140.0100.03812.66
5.3.130.0090.05312.66
5.3.120.0060.05112.66
5.3.110.0050.04212.66
5.3.100.0120.04812.13
5.3.90.0040.04912.11
5.3.80.0050.03812.10
5.3.70.0070.03512.10
5.3.60.0080.03412.07
5.3.50.0060.04112.02
5.3.40.0060.04212.02
5.3.30.0080.04911.98
5.3.20.0100.03711.76
5.3.10.0060.03411.73
5.3.00.0060.04111.72
5.2.170.0060.0359.23
5.2.160.0070.0359.23
5.2.150.0070.0299.23
5.2.140.0040.0329.23
5.2.130.0080.0329.19
5.2.120.0060.0319.19
5.2.110.0040.0319.20
5.2.100.0070.0329.20
5.2.90.0060.0369.20
5.2.80.0060.0419.19
5.2.70.0100.0409.19
5.2.60.0030.0359.15
5.2.50.0050.0359.11
5.2.40.0070.0279.09
5.2.30.0100.0299.06
5.2.20.0070.0319.05
5.2.10.0050.0298.96
5.2.00.0060.0298.82
5.1.60.0050.0248.10
5.1.50.0080.0278.10
5.1.40.0050.0318.08
5.1.30.0040.0288.43
5.1.20.0050.0278.45
5.1.10.0060.0268.18
5.1.00.0070.0308.18
5.0.50.0030.0266.66
5.0.40.0070.0246.52
5.0.30.0100.0366.33
5.0.20.0060.0276.29
5.0.10.0050.0296.27
5.0.00.0050.0366.27
4.4.90.0040.0224.78
4.4.80.0030.0214.75
4.4.70.0010.0234.75
4.4.60.0070.0204.76
4.4.50.0050.0204.77
4.4.40.0050.0374.71
4.4.30.0040.0164.76
4.4.20.0090.0294.84
4.4.10.0070.0284.85
4.4.00.0030.0254.75
4.3.110.0020.0184.67
4.3.100.0020.0174.67
4.3.90.0050.0144.63
4.3.80.0020.0274.58
4.3.70.0030.0154.63
4.3.60.0120.0364.63
4.3.50.0050.0144.63
4.3.40.0040.0234.54
4.3.30.0020.0213.32
4.3.20.0020.0213.29
4.3.10.0020.0183.26
4.3.00.0200.0236.86

preferences:
43.33 ms | 401 KiB | 5 Q