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; $i < round(strlen($string) / 2); $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)
8.3.60.0070.01118.55
8.3.50.0110.01322.12
8.3.40.0080.00818.97
8.3.30.0060.00819.17
8.3.20.0030.00520.44
8.3.10.0040.00423.66
8.3.00.0090.00019.40
8.2.180.0070.00717.00
8.2.170.0120.00322.96
8.2.160.0130.00720.50
8.2.150.0060.00924.18
8.2.140.0080.00024.66
8.2.130.0000.00726.16
8.2.120.0000.00922.24
8.2.110.0060.00320.95
8.2.100.0100.00317.88
8.2.90.0040.00419.35
8.2.80.0060.00317.97
8.2.70.0030.00517.50
8.2.60.0030.00718.05
8.2.50.0090.00018.07
8.2.40.0080.00019.78
8.2.30.0040.00418.07
8.2.20.0040.00417.90
8.2.10.0040.00418.25
8.2.00.0080.00017.92
8.1.280.0130.00725.92
8.1.270.0040.00422.00
8.1.260.0000.00726.35
8.1.250.0180.00028.09
8.1.240.0100.00320.89
8.1.230.0070.00419.20
8.1.220.0040.00417.79
8.1.210.0080.00018.77
8.1.200.0000.00917.25
8.1.190.0060.00317.35
8.1.180.0000.00818.10
8.1.170.0070.00018.53
8.1.160.0000.00721.93
8.1.150.0080.00018.89
8.1.140.0050.00217.42
8.1.130.0070.00017.45
8.1.120.0070.00017.41
8.1.110.0000.00717.37
8.1.100.0020.00517.36
8.1.90.0050.00217.44
8.1.80.0040.00317.43
8.1.70.0030.00317.43
8.1.60.0060.00317.55
8.1.50.0040.00417.56
8.1.40.0040.00417.59
8.1.30.0040.00417.55
8.1.20.0080.00017.73
8.1.10.0040.00417.50
8.1.00.0000.00817.60
8.0.300.0000.00718.77
8.0.290.0040.00416.88
8.0.280.0040.00418.48
8.0.270.0000.00717.32
8.0.260.0000.00716.95
8.0.250.0000.00716.97
8.0.240.0030.00317.07
8.0.230.0070.00016.96
8.0.220.0000.00616.89
8.0.210.0030.00316.95
8.0.200.0030.00317.05
8.0.190.0000.00717.00
8.0.180.0030.00517.04
8.0.170.0040.00416.95
8.0.160.0000.00816.98
8.0.150.0000.00817.03
8.0.140.0040.00417.00
8.0.130.0000.00613.48
8.0.120.0040.00417.03
8.0.110.0000.00716.97
8.0.100.0000.00716.92
8.0.90.0040.00417.06
8.0.80.0040.01717.01
8.0.70.0040.00416.97
8.0.60.0000.00816.91
8.0.50.0040.00416.89
8.0.30.0100.00917.22
8.0.20.0140.00517.40
8.0.10.0080.00017.06
8.0.00.0120.00616.83
7.4.330.0000.00615.14
7.4.320.0050.00516.47
7.4.300.0000.00616.68
7.4.290.0070.00016.55
7.4.280.0030.00316.55
7.4.270.0040.00416.53
7.4.260.0040.00416.55
7.4.250.0000.00816.43
7.4.240.0040.00416.63
7.4.230.0030.00316.68
7.4.220.0000.01916.71
7.4.210.0040.01116.64
7.4.200.0040.00416.44
7.4.160.0090.00616.66
7.4.150.0160.01017.40
7.4.140.0110.01417.86
7.4.130.0130.00516.70
7.4.120.0090.01016.59
7.4.110.0100.00716.75
7.4.100.0030.01416.66
7.4.90.0130.00316.63
7.4.80.0050.01319.39
7.4.70.0090.00916.72
7.4.60.0060.01216.52
7.4.50.0020.00216.58
7.4.40.0120.01216.71
7.4.30.0110.01116.44
7.4.00.0070.00714.95
7.3.330.0000.00513.44
7.3.320.0000.00513.31
7.3.310.0030.00316.31
7.3.300.0000.00716.48
7.3.290.0130.00316.46
7.3.280.0080.00916.50
7.3.270.0150.00817.40
7.3.260.0120.00616.48
7.3.250.0070.01016.49
7.3.240.0060.01416.59
7.3.230.0070.01016.54
7.3.210.0070.01016.40
7.3.200.0070.01019.39
7.3.190.0060.01216.44
7.3.180.0060.00916.48
7.3.170.0140.00716.51
7.3.160.0030.01416.46
7.2.330.0060.01116.76
7.2.320.0130.01316.82
7.2.310.0140.01116.64
7.2.300.0100.01116.88
7.2.290.0150.00516.70
7.2.00.0030.01019.52
7.1.100.0100.00318.33
7.1.70.0000.00817.28
7.1.60.0070.00717.27
7.1.50.0090.01616.94
7.1.00.0000.08022.50
7.0.200.0040.01216.71
7.0.140.0000.07722.08
7.0.60.0100.08020.07
7.0.50.0100.05717.85
7.0.40.0130.05320.18
7.0.30.0300.05320.34
7.0.20.0270.03720.10
7.0.10.0100.04020.19
7.0.00.0070.08020.16
5.6.280.0100.06020.89
5.6.210.0030.04320.65
5.6.200.0000.04718.18
5.6.190.0100.03720.67
5.6.180.0270.08020.67
5.6.170.0370.07020.59
5.6.160.0030.10020.53
5.6.150.0070.05318.18
5.6.140.0100.03318.14
5.6.130.0130.03318.20
5.6.120.0100.04021.02
5.6.110.0100.07321.02
5.6.100.0030.04320.96
5.6.90.0070.08020.99
5.6.80.0170.06720.34
5.6.70.4170.03720.39
5.5.350.0170.08020.42
5.5.340.0030.04718.05
5.5.330.0030.05320.13
5.5.320.0330.04720.48
5.5.310.0300.07320.33
5.5.300.0100.03718.03
5.5.290.0170.06017.99
5.5.280.0130.04020.76
5.5.270.0100.08320.65
5.5.260.0030.05720.80
5.5.250.0100.07020.80
5.5.240.0230.03720.12
5.4.450.0970.06019.63
5.4.440.0970.05019.45
5.4.430.0730.05019.61
5.4.420.0800.05319.35
5.4.410.0870.07019.32
5.4.400.0730.05019.15
5.4.390.0130.06019.15
5.4.380.0830.05719.01
5.4.370.0830.06019.30
5.4.360.0800.06019.44
5.4.350.0870.06319.12
5.4.340.0050.03612.02
5.4.320.0080.04012.51
5.4.310.0070.03912.50
5.4.300.0090.03612.50
5.4.290.0040.04312.50
5.4.280.0060.03512.40
5.4.270.0090.03412.39
5.4.260.0070.03712.40
5.4.250.0080.03612.39
5.4.240.0070.03512.40
5.4.230.0100.03912.39
5.4.220.0070.03912.39
5.4.210.0070.03612.39
5.4.200.0050.03912.39
5.4.190.0080.03512.39
5.4.180.0090.03912.39
5.4.170.0080.04712.39
5.4.160.0090.04512.39
5.4.150.0100.03712.39
5.4.140.0050.03912.07
5.4.130.0090.03812.06
5.4.120.0070.04912.02
5.4.110.0120.04812.01
5.4.100.0080.03612.02
5.4.90.0040.04212.01
5.4.80.0080.03912.01
5.4.70.0060.05112.00
5.4.60.0050.04312.01
5.4.50.0060.05612.01
5.4.40.0070.05012.00
5.4.30.0070.03811.99
5.4.20.0100.04511.99
5.4.10.0060.03711.99
5.4.00.0090.03411.49
5.3.290.0090.05312.80
5.3.280.0080.03812.71
5.3.270.0080.04512.72
5.3.260.0100.05112.72
5.3.250.0080.05012.72
5.3.240.0060.06112.72
5.3.230.0100.04812.71
5.3.220.0070.05712.68
5.3.210.0050.05712.68
5.3.200.0090.04012.68
5.3.190.0070.04612.68
5.3.180.0070.05812.68
5.3.170.0080.04812.67
5.3.160.0070.03612.67
5.3.150.0060.03812.68
5.3.140.0090.04312.66
5.3.130.0090.03912.66
5.3.120.0060.03912.65
5.3.110.0040.04112.66
5.3.100.0080.03812.12
5.3.90.0080.03612.10
5.3.80.0070.03612.09
5.3.70.0070.03412.09
5.3.60.0040.03812.07
5.3.50.0090.03312.02
5.3.40.0060.03612.02
5.3.30.0070.03311.98
5.3.20.0060.03711.76
5.3.10.0070.03311.73
5.3.00.0070.03511.71
5.2.170.0060.0299.23
5.2.160.0060.0289.23
5.2.150.0040.0329.23
5.2.140.0030.0319.23
5.2.130.0050.0299.19
5.2.120.0050.0309.19
5.2.110.0050.0299.20
5.2.100.0000.0339.20
5.2.90.0060.0309.20
5.2.80.0040.0329.19
5.2.70.0030.0329.19
5.2.60.0040.0309.14
5.2.50.0070.0299.11
5.2.40.0060.0369.09
5.2.30.0050.0369.06
5.2.20.0050.0409.05
5.2.10.0070.0318.96
5.2.00.0070.0298.82
5.1.60.0060.0248.10
5.1.50.0060.0248.10
5.1.40.0080.0228.08
5.1.30.0030.0288.43
5.1.20.0070.0258.45
5.1.10.0030.0328.18
5.1.00.0070.0258.18
5.0.50.0040.0206.66
5.0.40.0060.0216.52
5.0.30.0030.0346.33
5.0.20.0040.0216.30
5.0.10.0060.0316.28
5.0.00.0090.0286.27
4.4.90.0020.0194.78
4.4.80.0050.0164.76
4.4.70.0040.0174.76
4.4.60.0070.0154.75
4.4.50.0040.0174.77
4.4.40.0030.0274.71
4.4.30.0040.0204.76
4.4.20.0040.0164.84
4.4.10.0050.0204.85
4.4.00.0020.0294.75
4.3.110.0050.0164.67
4.3.100.0130.0404.66
4.3.90.0090.0454.64
4.3.80.0070.0414.58
4.3.70.0040.0224.63
4.3.60.0010.0234.63
4.3.50.0020.0244.63
4.3.40.0030.0264.54
4.3.30.0010.0183.32
4.3.20.0000.0223.30
4.3.10.0050.0173.26
4.3.00.0130.0236.86

preferences:
45.34 ms | 401 KiB | 5 Q