3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "abcdefghijklmnopqrstuvwxyz"; // just used as an example // $string becomes "badcfehgjilknmporqtsvuxwzy" $now_in_pairs = str_split($string, 2); $reverse = array_map('strrev', $now_in_pairs); foreach($reverse as $r) { $new_string .= $r; } echo $new_string;

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)
8.3.60.0100.01018.63
8.3.50.0100.00722.10
8.3.40.0150.00618.79
8.3.30.0100.01019.05
8.3.20.0070.00720.34
8.3.10.0050.00320.61
8.3.00.0080.00019.15
8.2.180.0150.00418.54
8.2.170.0110.00422.96
8.2.160.0100.00320.52
8.2.150.0000.00724.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0030.00720.94
8.2.110.0040.00820.52
8.2.100.0000.01217.84
8.2.90.0000.00819.35
8.2.80.0030.00517.97
8.2.70.0030.00617.75
8.2.60.0050.00317.93
8.2.50.0040.00418.07
8.2.40.0000.00718.34
8.2.30.0040.00419.37
8.2.20.0030.00517.95
8.2.10.0070.00018.07
8.2.00.0030.00517.84
8.1.280.0040.01125.92
8.1.270.0030.00623.91
8.1.260.0150.00326.35
8.1.250.0040.00428.09
8.1.240.0040.01723.67
8.1.230.0080.00419.08
8.1.220.0040.00417.78
8.1.210.0040.00418.77
8.1.200.0180.00017.00
8.1.190.0000.00817.23
8.1.180.0090.00018.10
8.1.170.0070.00318.35
8.1.160.0000.00721.94
8.1.150.0070.00018.85
8.1.140.0050.00217.34
8.1.130.0000.00717.75
8.1.120.0030.00517.56
8.1.110.0050.00217.43
8.1.100.0000.00817.51
8.1.90.0040.00417.50
8.1.80.0030.00417.36
8.1.70.0000.00717.43
8.1.60.0030.00617.66
8.1.50.0040.00417.53
8.1.40.0040.00417.53
8.1.30.0000.00817.59
8.1.20.0050.00217.69
8.1.10.0040.00417.39
8.1.00.0040.00417.42
8.0.300.0040.00418.77
8.0.290.0070.00016.75
8.0.280.0030.00318.36
8.0.270.0030.00317.32
8.0.260.0060.00017.20
8.0.250.0030.00316.92
8.0.240.0000.00716.89
8.0.230.0040.00317.02
8.0.220.0000.00716.88
8.0.210.0060.00616.93
8.0.200.0050.00317.02
8.0.190.0040.00416.99
8.0.180.0050.00217.00
8.0.170.0040.00416.99
8.0.160.0050.00316.95
8.0.150.0000.00716.93
8.0.140.0040.00416.90
8.0.130.0050.00013.43
8.0.120.0060.00316.92
8.0.110.0050.00216.98
8.0.100.0000.00716.98
8.0.90.0040.00417.03
8.0.80.0160.00616.91
8.0.70.0040.00417.03
8.0.60.0000.00716.87
8.0.50.0040.00416.96
8.0.30.0140.00917.13
8.0.20.0070.01117.40
8.0.10.0040.00416.89
8.0.00.0100.00916.69
7.4.330.0000.00515.00
7.4.320.0040.00416.54
7.4.300.0030.00316.50
7.4.290.0030.00316.65
7.4.280.0040.00416.60
7.4.270.0030.00316.54
7.4.260.0030.00316.59
7.4.250.0050.00216.50
7.4.240.0030.00416.50
7.4.230.0030.00516.44
7.4.220.0120.00616.56
7.4.210.0110.00316.60
7.4.200.0030.00316.42
7.4.160.0060.00916.56
7.4.150.0060.01117.40
7.4.140.0130.00617.86
7.4.130.0130.00316.58
7.4.120.0120.00516.62
7.4.110.0120.00616.54
7.4.100.0160.00616.52
7.4.90.0130.00716.52
7.4.80.0090.00819.39
7.4.70.0110.01416.68
7.4.60.0060.00916.61
7.4.50.0040.00416.68
7.4.40.0080.00816.61
7.4.30.0130.00716.64
7.4.00.0090.00615.06
7.3.330.0050.00013.19
7.3.320.0030.00313.32
7.3.310.0070.00016.43
7.3.300.0030.00316.39
7.3.290.0060.01116.43
7.3.280.0030.01316.36
7.3.270.0120.00617.40
7.3.260.0130.00716.47
7.3.250.0110.00616.27
7.3.240.0110.00716.40
7.3.230.0110.01116.49
7.3.210.0080.00916.60
7.3.200.0060.01519.39
7.3.190.0030.01916.44
7.3.180.0150.00616.36
7.3.170.0060.01016.58
7.3.160.0070.01016.42
7.2.330.0130.01016.67
7.2.320.0180.00616.73
7.2.310.0110.01116.56
7.2.300.0090.00616.70
7.2.290.0070.01016.48
7.2.60.0090.00617.02
7.2.00.0030.00919.48
7.1.200.0070.00715.66
7.1.100.0040.00718.04
7.1.70.0000.00817.23
7.1.60.0130.00919.61
7.1.50.0100.01317.02
7.1.00.0100.07022.29
7.0.200.0040.00416.61
7.0.140.0070.07021.93
7.0.60.0030.08720.00
7.0.50.0070.05317.66
7.0.40.0070.05719.90
7.0.30.0570.03720.13
7.0.20.0170.04720.20
7.0.10.0100.08720.18
7.0.00.0070.05320.27
5.6.280.0000.07720.86
5.6.210.0330.05720.72
5.6.200.0000.04318.16
5.6.190.0100.08020.57
5.6.180.0200.08320.27
5.6.170.0230.04720.46
5.6.160.0000.08720.49
5.6.150.0030.07318.18
5.6.140.0030.05018.15
5.6.130.0130.07318.20
5.6.120.0130.07721.02
5.6.110.0100.08020.98
5.6.100.0070.04321.13
5.6.90.0000.06020.98
5.6.80.0170.06020.38
5.6.70.3700.04020.38
5.5.350.0300.05320.42
5.5.340.0070.04017.97
5.5.330.0030.04320.40
5.5.320.0330.05720.34
5.5.310.0330.07020.30
5.5.300.0070.06717.91
5.5.290.0100.05317.96
5.5.280.0070.07320.79
5.5.270.0100.07720.64
5.5.260.0070.08320.76
5.5.250.0170.04720.70
5.5.240.0270.05720.25
5.4.450.0330.05019.43
5.4.440.0530.04319.45
5.4.430.0400.03719.40
5.4.420.0870.03719.41
5.4.410.0170.05319.43
5.4.400.0370.04319.14
5.4.390.0470.05319.09
5.4.380.0330.04018.73
5.4.370.0100.06318.59
5.4.360.0300.08018.49
5.4.350.0230.05318.73
5.4.340.0270.04018.69
5.4.320.0050.04212.46
5.4.310.0080.04012.45
5.4.300.0060.04112.46
5.4.290.0080.03712.45
5.4.280.0060.03912.35
5.4.270.0080.03612.35
5.4.260.0080.04412.35
5.4.250.0050.04512.35
5.4.240.0060.04212.35
5.4.230.0080.03512.34
5.4.220.0080.03812.34
5.4.210.0080.03412.34
5.4.200.0100.03312.34
5.4.190.0060.03712.34
5.4.180.0070.03612.34
5.4.170.0040.03912.35
5.4.160.0100.04412.35
5.4.150.0100.03512.34
5.4.140.0050.04212.03
5.4.130.0050.04312.01
5.4.120.0090.03611.97
5.4.110.0040.04111.96
5.4.100.0110.03911.97
5.4.90.0070.03811.97
5.4.80.0080.04311.96
5.4.70.0070.04011.97
5.4.60.0070.03811.96
5.4.50.0050.03811.96
5.4.40.0080.03711.95
5.4.30.0080.04311.95
5.4.20.0110.04111.95
5.4.10.0100.04211.95
5.4.00.0070.03711.44
5.3.290.0100.05012.80
5.3.280.0110.04612.71
5.3.270.0100.04312.72
5.3.260.0100.04512.71
5.3.250.0080.03712.71
5.3.240.0100.04312.72
5.3.230.0160.04512.71
5.3.220.0060.03912.68
5.3.210.0080.04112.68
5.3.200.0120.05012.68
5.3.190.0110.04512.68
5.3.180.0100.04112.67
5.3.170.0100.04712.67
5.3.160.0040.04112.68
5.3.150.0020.05212.67
5.3.140.0090.03912.66
5.3.130.0070.04112.65
5.3.120.0080.04612.65
5.3.110.0170.03912.65
5.3.100.0070.03612.11
5.3.90.0110.03512.08
5.3.80.0090.03412.07
5.3.70.0070.04112.07
5.3.60.0070.03812.06
5.3.50.0060.04212.00
5.3.40.0090.03612.00
5.3.30.0070.03611.94
5.3.20.0080.05011.73
5.3.10.0080.03311.69
5.3.00.0040.03711.68
5.2.170.0070.0309.18
5.2.160.0100.0349.18
5.2.150.0070.0299.18
5.2.140.0060.0329.18
5.2.130.0050.0359.14
5.2.120.0060.0289.14
5.2.110.0060.0309.15
5.2.100.0050.0319.14
5.2.90.0040.0299.14
5.2.80.0040.0309.13
5.2.70.0060.0299.14
5.2.60.0030.0329.08
5.2.50.0040.0309.05
5.2.40.0050.0289.04
5.2.30.0040.0309.01
5.2.20.0030.0409.00
5.2.10.0100.0338.92
5.2.00.0080.0418.78
5.1.60.0040.0318.06
5.1.50.0040.0358.06
5.1.40.0050.0318.04
5.1.30.0060.0308.39
5.1.20.0050.0368.41
5.1.10.0050.0308.14
5.1.00.0080.0338.14
5.0.50.0030.0216.62
5.0.40.0060.0216.48
5.0.30.0050.0386.29
5.0.20.0000.0236.26
5.0.10.0040.0196.24
5.0.00.0060.0316.23
4.4.90.0020.0194.78
4.4.80.0050.0194.76
4.4.70.0030.0264.75
4.4.60.0040.0264.76
4.4.50.0030.0284.77
4.4.40.0040.0274.71
4.4.30.0020.0184.76
4.4.20.0040.0224.84
4.4.10.0080.0134.85
4.4.00.0040.0284.76
4.3.110.0020.0294.66
4.3.100.0060.0174.66
4.3.90.0060.0154.63
4.3.80.0040.0234.58
4.3.70.0080.0114.63
4.3.60.0040.0134.62
4.3.50.0020.0174.63
4.3.40.0050.0224.54
4.3.30.0020.0163.28
4.3.20.0000.0183.26
4.3.10.0020.0163.21
4.3.00.0030.01713.57

preferences:
36.32 ms | 401 KiB | 5 Q