3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string)-1; for ($i = 0; $i < ($strLength / 2); $i++) { $substr1 += $string[$strLength-$i]; $substr2 += $string[$i]; } return $string = $substr1 + $substr2; } 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)
8.3.40.0100.00718.96
8.3.30.0080.00819.05
8.3.20.0000.00819.99
8.3.10.0040.00423.61
8.3.00.0000.00819.36
8.2.170.0040.01122.96
8.2.160.0140.00720.39
8.2.150.0070.00024.18
8.2.140.0080.00024.66
8.2.130.0070.00026.16
8.2.120.0040.00422.22
8.2.110.0030.00620.38
8.2.100.0070.00318.09
8.2.90.0000.00919.20
8.2.80.0060.00317.97
8.2.70.0040.00417.75
8.2.60.0040.00417.93
8.2.50.0080.00018.07
8.2.40.0040.00420.07
8.2.30.0050.00318.05
8.2.20.0030.00517.69
8.2.10.0040.00418.13
8.2.00.0070.00017.68
8.1.270.0100.00022.20
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0000.00923.96
8.1.230.0070.00419.07
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0060.00317.36
8.1.190.0060.00317.35
8.1.180.0040.00418.10
8.1.170.0060.00618.59
8.1.160.0000.00721.96
8.1.150.0070.00018.87
8.1.140.0000.00717.40
8.1.130.0070.00017.83
8.1.120.0040.00417.41
8.1.110.0000.00717.45
8.1.100.0040.00417.41
8.1.90.0070.00017.37
8.1.80.0040.00417.40
8.1.70.0030.00317.29
8.1.60.0050.00517.53
8.1.50.0040.00417.47
8.1.40.0000.00817.52
8.1.30.0030.00517.70
8.1.20.0050.00217.70
8.1.10.0000.00717.52
8.1.00.0080.00017.44
8.0.300.0050.00318.77
8.0.290.0070.00016.75
8.0.280.0080.00018.39
8.0.270.0070.00017.25
8.0.260.0030.00317.26
8.0.250.0030.00316.89
8.0.240.0000.00716.99
8.0.230.0000.00716.99
8.0.220.0000.00716.93
8.0.210.0000.00616.82
8.0.200.0040.00417.00
8.0.190.0040.00416.86
8.0.180.0000.00716.89
8.0.170.0030.00516.96
8.0.160.0040.00416.93
8.0.150.0000.00716.80
8.0.140.0000.00716.84
8.0.130.0000.00513.39
8.0.120.0050.00316.76
8.0.110.0040.00416.86
8.0.100.0000.00716.96
8.0.90.0040.00416.92
8.0.80.0100.00716.95
8.0.70.0040.00416.91
8.0.60.0040.00416.84
8.0.50.0000.00816.89
8.0.30.0110.00917.20
8.0.20.0150.00517.40
8.0.10.0000.00817.05
8.0.00.0090.00916.89
7.4.330.0050.00015.02
7.4.320.0030.00716.50
7.4.300.0030.00316.61
7.4.290.0020.00516.63
7.4.280.0050.00316.42
7.4.270.0030.00316.59
7.4.260.0030.00316.50
7.4.250.0000.00816.55
7.4.240.0050.00216.50
7.4.230.0070.00016.68
7.4.220.0060.01216.71
7.4.210.0090.01216.64
7.4.200.0050.00316.50
7.4.160.0070.01016.44
7.4.150.0130.01017.40
7.4.140.0110.00917.86
7.4.130.0050.01216.67
7.4.120.0090.01216.52
7.4.110.0150.00616.43
7.4.100.0070.01016.64
7.4.90.0070.01016.50
7.4.80.0100.01419.39
7.4.70.0110.00516.59
7.4.60.0070.01216.66
7.4.50.0000.00816.65
7.4.40.0190.00316.58
7.4.30.0040.01116.59
7.4.00.0030.01215.04
7.3.330.0030.00313.39
7.3.320.0000.00613.43
7.3.310.0000.00916.53
7.3.300.0000.00616.30
7.3.290.0060.01016.40
7.3.280.0060.01216.39
7.3.270.0100.00817.40
7.3.260.0120.00916.68
7.3.250.0060.01116.45
7.3.240.0070.01016.42
7.3.230.0130.00316.43
7.3.210.0080.00816.68
7.3.200.0100.00719.39
7.3.190.0070.01016.36
7.3.180.0100.01316.61
7.3.170.0100.01316.41
7.3.160.0130.01016.37
7.3.10.0070.00716.41
7.3.00.0100.00716.65
7.2.330.0150.00316.63
7.2.320.0070.01016.79
7.2.310.0100.00616.48
7.2.300.0080.00816.84
7.2.290.0130.00916.64
7.2.130.0030.00616.87
7.2.120.0090.00316.89
7.2.110.0060.00316.63
7.2.100.0040.01117.05
7.2.90.0030.01016.75
7.2.80.0000.01116.89
7.2.70.0040.01117.00
7.2.60.0070.00816.86
7.2.50.0070.00716.87
7.2.40.0040.01117.02
7.2.30.0040.01216.75
7.2.20.0030.00717.01
7.2.10.0100.00716.96
7.2.00.0050.00918.10
7.1.250.0060.00615.77
7.1.200.0060.00315.68
7.1.100.0000.01418.17
7.1.70.0090.00917.00
7.1.60.0110.01519.11
7.1.50.0040.01816.79
7.1.00.0070.07322.43
7.0.200.0080.00016.78
7.0.140.0070.07022.07
7.0.100.0170.07319.96
7.0.90.0030.08320.04
7.0.80.0070.08319.93
7.0.70.0300.07719.93
7.0.60.0230.08019.98
7.0.50.0100.05720.21
7.0.40.0030.08019.95
7.0.30.0070.07320.00
7.0.20.0070.06719.95
7.0.10.0070.05020.13
7.0.00.0070.07720.04
5.6.280.0070.06321.15
5.6.250.0130.07020.57
5.6.240.0130.08020.68
5.6.230.0100.08020.69
5.6.220.0030.07720.50
5.6.210.0200.07320.65
5.6.200.0100.07021.09
5.6.190.0100.08721.08
5.6.180.0130.07321.11
5.6.170.0070.06721.05
5.6.160.0030.08721.02
5.6.150.0170.07021.05
5.6.140.0170.06721.17
5.6.130.0130.07321.12
5.6.120.0100.04721.05
5.6.110.0100.08321.02
5.6.100.0100.06020.95
5.6.90.0100.05721.06
5.6.80.0030.06020.41
5.6.70.0070.05720.49
5.6.60.0000.04320.39
5.6.50.0000.07720.50
5.6.40.0130.07720.41
5.6.30.0070.07720.31
5.6.20.0100.06720.31
5.6.10.0000.05720.38
5.6.00.0000.07020.43
5.5.380.0070.07720.36
5.5.370.0100.07320.35
5.5.360.0130.04720.54
5.5.350.0130.07720.43
5.5.340.0000.07020.91
5.5.330.0130.07720.93
5.5.320.0070.08320.81
5.5.310.0030.04320.88
5.5.300.0170.05720.83
5.5.290.0030.05720.89
5.5.280.0130.06320.80
5.5.270.0030.05020.92
5.5.260.0030.05020.75
5.5.250.0130.03720.74
5.5.240.0130.05320.19
5.5.230.0030.06320.30
5.5.220.0070.07320.15
5.5.210.0070.04020.25
5.5.200.0030.07720.25
5.5.190.0100.05320.25
5.5.180.0000.05320.15
5.5.160.0100.03720.23
5.5.150.0170.05019.98
5.5.140.0100.07320.23
5.5.130.0130.07320.25
5.5.120.0200.07320.23
5.5.110.0100.07720.17
5.5.100.0100.07020.17
5.5.90.0030.07320.07
5.5.80.0070.08320.09
5.5.70.0130.07020.08
5.5.60.0100.06320.05
5.5.50.0130.05020.11
5.5.40.0100.07320.05
5.5.30.0230.03020.05
5.5.20.0100.04320.06
5.5.10.0130.04719.97
5.5.00.0100.05720.04
5.4.450.0070.04019.23
5.4.440.0130.06319.27
5.4.430.0070.06319.20
5.4.420.0030.05719.50
5.4.410.0030.05719.35
5.4.400.0100.04019.13
5.4.390.0030.06319.13
5.4.380.0030.08319.18
5.4.370.0030.07719.17
5.4.360.0070.06719.14
5.4.350.0130.07318.94
5.4.340.0130.06318.90
5.4.320.0130.07719.13
5.4.310.0170.06319.05
5.4.300.0070.04718.90
5.4.290.0170.05319.13
5.4.280.0030.08019.16
5.4.270.0100.06719.17
5.4.260.0100.07319.20
5.4.250.0130.03719.04
5.4.240.0000.07019.04
5.4.230.0070.04019.04
5.4.220.0030.05019.08
5.4.210.0100.06319.20
5.4.200.0000.06019.12
5.4.190.0130.05318.89
5.4.180.0100.03318.89
5.4.170.0030.05318.93
5.4.160.0070.06019.11
5.4.150.0070.04718.88
5.4.140.0030.08316.45
5.4.130.0030.04316.41
5.4.120.0070.04316.50
5.4.110.0030.05016.46
5.4.100.0000.07016.34
5.4.90.0030.04016.34
5.4.80.0130.03316.25
5.4.70.0030.03716.45
5.4.60.0000.07316.45
5.4.50.0100.07016.45
5.4.40.0000.04316.54
5.4.30.0070.07016.33
5.4.20.0030.05316.48
5.4.10.0030.04316.44
5.4.00.0070.06715.84
5.3.290.0030.07314.77
5.3.280.0070.07314.59
5.3.270.0030.07714.56
5.3.260.0100.06714.66
5.3.250.0030.05314.74
5.3.240.0030.07714.64
5.3.230.0100.06014.59
5.3.220.0030.04014.55
5.3.210.0030.04714.49
5.3.200.0030.05314.68
5.3.190.0100.07714.68
5.3.180.0070.04314.49
5.3.170.0030.06314.62
5.3.160.0100.06714.59
5.3.150.0130.06014.63
5.3.140.0030.07714.55
5.3.130.0030.08014.54
5.3.120.0130.04014.57
5.3.110.0130.03714.50
5.3.100.0070.06714.14
5.3.90.0100.06714.00
5.3.80.0000.07313.91
5.3.70.0030.06714.07
5.3.60.0070.06714.13
5.3.50.0070.05713.97
5.3.40.0070.05714.00
5.3.30.0030.04313.89
5.3.20.0070.06713.61
5.3.10.0000.05713.64
5.3.00.0100.04713.70
5.2.170.0000.05012.58
5.2.160.0030.04712.58
5.2.150.0070.06712.58
5.2.140.0070.06012.58
5.2.130.0070.06012.58
5.2.120.0030.05312.58
5.2.110.0030.04712.58
5.2.100.0100.02712.58
5.2.90.0100.04312.58
5.2.80.0070.05312.58
5.2.70.0070.06012.58
5.2.60.0030.06712.58
5.2.50.0170.03012.58
5.2.40.0100.04712.58
5.2.30.0070.06012.58
5.2.20.0100.02712.58
5.2.10.0100.02312.58
5.2.00.0000.04712.58
5.1.60.0030.05712.58
5.1.50.0000.03012.58
5.1.40.0070.02312.58
5.1.30.0070.03012.58
5.1.20.0030.05712.58
5.1.10.0030.03012.58
5.1.00.0030.02712.58
5.0.50.0070.02012.58
5.0.40.0030.02012.58
5.0.30.0070.02712.58
5.0.20.0000.02712.58
5.0.10.0000.03012.58
5.0.00.0030.03012.58
4.4.90.0030.03312.58
4.4.80.0000.03712.58
4.4.70.0030.01312.58
4.4.60.0000.01712.58
4.4.50.0000.01712.58
4.4.40.0000.03312.58
4.4.30.0000.01712.58
4.4.20.0070.01312.58
4.4.10.0000.02012.58
4.4.00.0030.02312.58
4.3.110.0000.01712.58
4.3.100.0030.01312.58
4.3.90.0030.02712.58
4.3.80.0000.04012.58
4.3.70.0070.01012.58
4.3.60.0070.03012.58
4.3.50.0000.01712.58
4.3.40.0000.04012.58
4.3.30.0000.01712.58
4.3.20.0000.02312.58
4.3.10.0000.01712.58
4.3.00.0000.01712.58

preferences:
39.71 ms | 400 KiB | 5 Q