3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round(strlen($string) / 2); for ($i = 0; $i <= $strLengthHalf -$i; $i++) { var_dump($strLength-$i); var_dump($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)
8.3.60.0120.00318.45
8.3.50.0150.00721.26
8.3.40.0110.00418.96
8.3.30.0060.00919.30
8.3.20.0070.00020.32
8.3.10.0000.00823.84
8.3.00.0080.00019.39
8.2.180.0070.00716.75
8.2.170.0100.01022.96
8.2.160.0100.01020.43
8.2.150.0150.00324.18
8.2.140.0060.00324.66
8.2.130.0070.01126.16
8.2.120.0100.00522.20
8.2.110.0060.00322.18
8.2.100.0080.00417.88
8.2.90.0040.00419.26
8.2.80.0040.00417.97
8.2.70.0000.00817.63
8.2.60.0030.00718.05
8.2.50.0040.00418.07
8.2.40.0000.00920.07
8.2.30.0040.00418.15
8.2.20.0040.00417.86
8.2.10.0000.00818.17
8.2.00.0030.00617.81
8.1.280.0110.00725.92
8.1.270.0030.01222.04
8.1.260.0000.00826.35
8.1.250.0000.00728.09
8.1.240.0030.00623.83
8.1.230.0030.00819.35
8.1.220.0040.00417.77
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0080.00017.22
8.1.180.0050.00318.10
8.1.170.0080.00018.71
8.1.160.0040.00422.01
8.1.150.0040.00418.78
8.1.140.0040.00417.37
8.1.130.0030.00317.77
8.1.120.0020.00517.48
8.1.110.0040.00417.50
8.1.100.0070.00017.53
8.1.90.0070.00017.40
8.1.80.0040.00417.48
8.1.70.0030.00317.42
8.1.60.0040.00417.66
8.1.50.0030.00517.51
8.1.40.0040.00417.49
8.1.30.0060.00317.65
8.1.20.0030.00617.66
8.1.10.0030.00517.57
8.1.00.0000.00717.56
8.0.300.0000.00718.77
8.0.290.0030.00516.63
8.0.280.0030.00318.51
8.0.270.0000.00717.16
8.0.260.0060.00017.20
8.0.250.0030.00317.00
8.0.240.0030.00316.96
8.0.230.0030.00317.04
8.0.220.0030.00316.93
8.0.210.0020.00516.92
8.0.200.0030.00316.97
8.0.190.0030.00517.03
8.0.180.0000.00817.00
8.0.170.0040.00417.01
8.0.160.0040.00417.04
8.0.150.0070.00016.93
8.0.140.0040.00417.00
8.0.130.0030.00313.36
8.0.120.0040.00417.01
8.0.110.0070.00016.99
8.0.100.0040.00416.83
8.0.90.0000.00816.96
8.0.80.0100.01016.97
8.0.70.0020.00517.02
8.0.60.0030.00717.06
8.0.50.0040.00316.90
8.0.30.0120.00817.08
8.0.20.0080.01617.40
8.0.10.0000.00816.88
8.0.00.0060.01216.77
7.4.330.0020.00215.02
7.4.320.0090.00016.52
7.4.300.0060.00016.53
7.4.290.0030.00516.59
7.4.280.0030.00316.65
7.4.270.0040.00416.59
7.4.260.0080.00016.66
7.4.250.0070.00016.64
7.4.240.0030.00316.52
7.4.230.0030.00316.41
7.4.220.0130.00416.68
7.4.210.0040.01116.68
7.4.200.0000.00716.64
7.4.160.0120.00316.55
7.4.150.0060.01717.40
7.4.140.0210.01517.86
7.4.130.0090.00716.64
7.4.120.0090.00916.63
7.4.110.0070.01016.65
7.4.100.0050.01316.51
7.4.90.0130.00716.59
7.4.80.0140.00419.39
7.4.70.0100.01016.61
7.4.60.0160.00316.59
7.4.50.0030.00616.51
7.4.40.0080.00816.46
7.4.30.0120.00616.70
7.4.00.0030.01315.10
7.3.330.0000.00613.36
7.3.320.0030.00313.46
7.3.310.0030.00316.53
7.3.300.0040.00416.36
7.3.290.0080.00816.47
7.3.280.0110.00916.51
7.3.270.0120.00917.40
7.3.260.0120.00616.55
7.3.250.0090.00816.45
7.3.240.0120.00416.65
7.3.230.0080.00816.68
7.3.210.0100.00716.56
7.3.200.0120.00919.39
7.3.190.0130.00316.46
7.3.180.0070.01016.38
7.3.170.0070.01016.50
7.3.160.0090.00616.50
7.2.330.0110.00716.56
7.2.320.0030.01516.72
7.2.310.0130.00316.75
7.2.300.0040.01216.67
7.2.290.0030.01816.55
7.2.00.0000.01219.24
7.1.100.0060.00917.97
7.1.70.0050.00517.16
7.1.60.0060.01919.11
7.1.50.0120.01217.01
7.1.00.0070.07322.34
7.0.200.0040.00716.65
7.0.140.0100.06722.11
7.0.60.0070.04020.00
7.0.50.0130.06017.88
7.0.40.0130.07320.16
7.0.30.0270.08320.26
7.0.20.0300.06320.10
7.0.10.0000.06020.30
7.0.00.0030.04720.18
5.6.280.0070.07020.82
5.6.210.0170.07020.67
5.6.200.0170.06318.16
5.6.190.0170.07720.77
5.6.180.0400.06720.48
5.6.170.0300.06020.46
5.6.160.0000.06720.50
5.6.150.0070.07318.22
5.6.140.0070.08718.19
5.6.130.0030.09018.18
5.6.120.0070.05321.05
5.6.110.0100.05320.99
5.6.100.0270.06720.91
5.6.90.0000.09321.10
5.6.80.0030.04020.29
5.5.350.4330.04020.50
5.5.340.0170.07317.98
5.5.330.0030.09020.31
5.5.320.0600.04720.42
5.5.310.0130.04720.44
5.5.300.0100.08318.04
5.5.290.0000.05317.98
5.5.280.0100.07720.66
5.5.270.0070.07720.88
5.5.260.0130.07320.84
5.5.250.0100.08720.78
5.5.240.0200.07020.37
5.4.450.0970.06719.64
5.4.440.0930.06719.64
5.4.430.0530.06019.30
5.4.420.0630.05319.64
5.4.410.0130.06019.63
5.4.400.0600.05719.44
5.4.390.0800.06719.13
5.4.380.0330.05718.87
5.4.370.0700.06719.15
5.4.360.0130.05319.14
5.4.350.0900.08019.35
5.4.340.0060.03512.02
5.4.320.0040.03912.51
5.4.310.0030.04212.50
5.4.300.0060.03712.51
5.4.290.0050.03912.50
5.4.280.0090.04012.40
5.4.270.0030.04212.41
5.4.260.0060.03712.40
5.4.250.0080.03512.40
5.4.240.0070.04012.40
5.4.230.0050.03912.39
5.4.220.0040.03812.39
5.4.210.0100.03112.39
5.4.200.0110.04812.39
5.4.190.0060.05112.39
5.4.180.0090.03512.39
5.4.170.0060.04312.40
5.4.160.0040.03712.39
5.4.150.0040.03912.39
5.4.140.0040.04712.08
5.4.130.0070.04212.06
5.4.120.0060.03612.02
5.4.110.0070.03512.02
5.4.100.0040.03812.02
5.4.90.0050.03812.02
5.4.80.0030.04312.02
5.4.70.0060.03812.01
5.4.60.0050.03712.01
5.4.50.0070.03512.01
5.4.40.0040.03712.00
5.4.30.0050.03612.00
5.4.20.0070.03512.00
5.4.10.0030.03812.00
5.4.00.0070.03711.49
5.3.290.0070.03912.80
5.3.280.0050.03912.70
5.3.270.0050.04612.73
5.3.260.0060.03912.72
5.3.250.0090.03412.72
5.3.240.0040.03912.72
5.3.230.0070.03612.71
5.3.220.0110.03212.68
5.3.210.0040.04112.68
5.3.200.0040.03812.68
5.3.190.0070.03712.68
5.3.180.0110.03312.67
5.3.170.0080.03512.66
5.3.160.0090.04412.68
5.3.150.0060.03712.68
5.3.140.0060.03612.66
5.3.130.0050.04012.65
5.3.120.0110.03512.66
5.3.110.0090.04512.66
5.3.100.0090.03812.13
5.3.90.0090.03412.11
5.3.80.0090.04512.10
5.3.70.0060.03712.10
5.3.60.0060.03612.08
5.3.50.0050.03612.02
5.3.40.0080.03512.02
5.3.30.0070.04911.98
5.3.20.0020.03911.77
5.3.10.0070.03511.73
5.3.00.0110.04611.72
5.2.170.0040.0409.23
5.2.160.0090.0269.24
5.2.150.0090.0389.23
5.2.140.0070.0309.23
5.2.130.0080.0329.20
5.2.120.0060.0379.20
5.2.110.0080.0299.20
5.2.100.0080.0289.20
5.2.90.0090.0289.20
5.2.80.0040.0329.20
5.2.70.0040.0309.19
5.2.60.0040.0329.15
5.2.50.0070.0429.12
5.2.40.0070.0379.09
5.2.30.0060.0409.07
5.2.20.0050.0299.06
5.2.10.0130.0298.96
5.2.00.0020.0348.82
5.1.60.0040.0248.11
5.1.50.0060.0238.11
5.1.40.0050.0248.09
5.1.30.0010.0308.43
5.1.20.0070.0238.46
5.1.10.0040.0268.18
5.1.00.0070.0308.18
5.0.50.0040.0216.67
5.0.40.0020.0206.53
5.0.30.0030.0346.34
5.0.20.0050.0236.31
5.0.10.0060.0286.29
5.0.00.0050.0376.28
4.4.90.0080.0454.78
4.4.80.0030.0184.75
4.4.70.0050.0194.75
4.4.60.0030.0214.75
4.4.50.0060.0194.77
4.4.40.0060.0304.70
4.4.30.0020.0184.76
4.4.20.0110.0374.85
4.4.10.0050.0264.85
4.4.00.0040.0524.76
4.3.110.0020.0234.67
4.3.100.0030.0174.67
4.3.90.0030.0194.64
4.3.80.0040.0234.58
4.3.70.0040.0154.63
4.3.60.0030.0174.63
4.3.50.0060.0264.63
4.3.40.0010.0284.54
4.3.30.0040.0353.34
4.3.20.0060.0363.31
4.3.10.0030.0173.28
4.3.00.0100.0236.85

preferences:
32.55 ms | 401 KiB | 5 Q