3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); for ($i = 0; $i < ($strLength / 2); $i++) { $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$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)
8.3.60.0090.00918.68
8.3.50.0120.01221.19
8.3.40.0120.00618.79
8.3.30.0110.00319.04
8.3.20.0040.00420.34
8.3.10.0090.00023.57
8.3.00.0000.00819.51
8.2.180.0100.00718.55
8.2.170.0120.00322.96
8.2.160.0140.00320.43
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0080.00022.09
8.2.110.0030.00621.98
8.2.100.0080.00417.75
8.2.90.0000.00719.22
8.2.80.0060.00317.97
8.2.70.0060.00317.75
8.2.60.0030.00817.93
8.2.50.0040.00418.07
8.2.40.0090.00020.07
8.2.30.0080.00018.15
8.2.20.0040.00417.80
8.2.10.0050.00218.10
8.2.00.0040.00417.85
8.1.280.0000.01525.92
8.1.270.0040.00422.06
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0080.00023.80
8.1.230.0110.00019.13
8.1.220.0030.00617.74
8.1.210.0050.00318.77
8.1.200.0060.00317.35
8.1.190.0060.00317.23
8.1.180.0040.00418.10
8.1.170.0130.00018.65
8.1.160.0030.00622.03
8.1.150.0040.00418.89
8.1.140.0000.00817.34
8.1.130.0000.00717.83
8.1.120.0000.00717.33
8.1.110.0000.00717.32
8.1.100.0000.00817.43
8.1.90.0040.00417.30
8.1.80.0000.00717.31
8.1.70.0030.00317.43
8.1.60.0000.00917.47
8.1.50.0030.00517.56
8.1.40.0000.00717.49
8.1.30.0000.00917.52
8.1.20.0040.00417.66
8.1.10.0000.00717.57
8.1.00.0000.00717.41
8.0.300.0050.00218.77
8.0.290.0060.00316.75
8.0.280.0050.00218.38
8.0.270.0040.00417.27
8.0.260.0030.00317.27
8.0.250.0000.00717.05
8.0.240.0000.00717.00
8.0.230.0000.00717.02
8.0.220.0030.00317.00
8.0.210.0030.00316.85
8.0.200.0030.00317.05
8.0.190.0000.00716.98
8.0.180.0070.00016.88
8.0.170.0030.00516.89
8.0.160.0000.00716.96
8.0.150.0070.00017.00
8.0.140.0040.00416.82
8.0.130.0030.00313.39
8.0.120.0080.00016.83
8.0.110.0000.00716.84
8.0.100.0040.00417.02
8.0.90.0070.00017.05
8.0.80.0130.00716.98
8.0.70.0080.00017.02
8.0.60.0000.00716.86
8.0.50.0040.00416.97
8.0.30.0120.00817.25
8.0.20.0080.01417.40
8.0.10.0040.00417.07
8.0.00.0050.01416.70
7.4.330.0000.00515.09
7.4.320.0100.00016.55
7.4.300.0000.00716.61
7.4.290.0030.00316.50
7.4.280.0060.00316.36
7.4.270.0000.00816.57
7.4.260.0070.00016.62
7.4.250.0020.00516.43
7.4.240.0030.00316.54
7.4.230.0030.00316.42
7.4.220.0030.01816.73
7.4.210.0080.00816.55
7.4.200.0070.00016.64
7.4.160.0100.00616.66
7.4.150.0030.01517.40
7.4.140.0060.01317.86
7.4.130.0120.00516.42
7.4.120.0120.00916.63
7.4.110.0140.00716.66
7.4.100.0070.01016.74
7.4.90.0030.01416.77
7.4.80.0160.01319.39
7.4.70.0170.00016.82
7.4.60.0100.00716.62
7.4.50.0040.00416.46
7.4.40.0120.00416.43
7.4.30.0140.00316.48
7.4.00.0080.00815.05
7.3.330.0050.00013.43
7.3.320.0070.00013.46
7.3.310.0030.00316.25
7.3.300.0050.00216.44
7.3.290.0110.00316.41
7.3.280.0090.00516.43
7.3.270.0100.00717.40
7.3.260.0100.00616.49
7.3.250.0120.00816.43
7.3.240.0080.00816.39
7.3.230.0140.00716.39
7.3.210.0120.00616.39
7.3.200.0130.00319.39
7.3.190.0090.01316.39
7.3.180.0100.00616.44
7.3.170.0070.01016.41
7.3.160.0100.01016.57
7.3.10.0070.00416.72
7.3.00.0030.01116.69
7.2.330.0030.01516.70
7.2.320.0110.00716.89
7.2.310.0150.00916.84
7.2.300.0130.00316.57
7.2.290.0080.01616.57
7.2.130.0030.01117.02
7.2.120.0020.01016.91
7.2.110.0080.00716.71
7.2.100.0030.00917.08
7.2.90.0080.00517.12
7.2.80.0060.00616.88
7.2.70.0110.00216.84
7.2.60.0080.00616.91
7.2.50.0030.00817.02
7.2.40.0050.00716.93
7.2.30.0040.01017.00
7.2.20.0080.00316.97
7.2.10.0030.01016.83
7.2.00.0030.01017.59
7.1.250.0050.00815.85
7.1.100.0080.00018.00
7.1.70.0030.01316.90
7.1.60.0060.01919.11
7.1.50.0070.01716.92
7.1.00.0000.06722.45
7.0.200.0000.00716.59
7.0.140.0100.06721.96
7.0.120.0000.04722.02
7.0.110.0000.07322.03
7.0.100.0100.05022.11
7.0.90.0030.07022.09
7.0.80.0070.07721.98
7.0.70.0030.08022.08
7.0.60.0030.07022.13
7.0.50.0030.03722.04
7.0.40.0000.08719.93
7.0.30.0030.07320.13
7.0.20.0000.05719.93
7.0.10.0030.05719.97
7.0.00.0070.08020.14
5.6.280.0030.07321.08
5.6.270.0030.08721.05
5.6.260.0030.06720.74
5.6.250.0070.03320.91
5.6.240.0100.07320.82
5.6.230.0030.05320.94
5.6.220.0030.05720.80
5.6.210.0130.07320.61
5.6.200.0030.07020.75
5.6.190.0000.04020.76
5.6.180.0100.05720.75
5.6.170.0000.09020.94
5.6.160.0030.06721.01
5.6.150.0070.03720.75
5.6.140.0030.09320.69
5.6.130.0030.07720.88
5.6.120.0030.09020.98
5.6.110.0000.07020.78
5.6.100.0030.06020.77
5.6.90.0030.06321.00
5.6.80.0000.04020.38
5.6.70.0030.07320.32
5.6.60.0030.08320.32
5.6.50.0000.04020.35
5.6.40.0000.06720.37
5.6.30.0000.07320.36
5.6.20.0000.07320.36
5.6.10.0070.06320.14
5.6.00.0070.04720.38
5.5.380.0070.07317.47
5.5.370.0000.08017.54
5.5.360.0030.04017.50
5.5.350.0070.05717.68
5.5.340.0000.09018.12
5.5.330.0100.06318.12
5.5.320.0070.03317.93
5.5.310.0070.07318.09
5.5.300.0000.04018.12
5.5.290.0000.05018.09
5.5.280.0030.04318.13
5.5.270.0100.08317.93
5.5.260.0000.08718.24
5.5.250.0100.03017.74
5.5.240.0000.08017.48
5.5.230.0030.08017.47
5.5.220.0070.05717.30
5.5.210.0030.06317.31
5.5.200.0030.06717.29
5.5.190.0030.08317.61
5.5.180.0070.04717.48
5.5.160.0030.04317.58
5.5.150.0000.05317.27
5.5.140.0000.05717.47
5.5.130.0030.07717.30
5.5.120.0000.05017.27
5.5.110.0070.06017.43
5.5.100.0070.07017.09
5.5.90.0000.08017.34
5.5.80.0030.06017.21
5.5.70.0030.04017.16
5.5.60.0000.05717.46
5.5.50.0000.08017.17
5.5.40.0000.04017.16
5.5.30.0030.07017.46
5.5.20.0030.07317.34
5.5.10.0100.05017.15
5.5.00.0030.05317.36
5.4.450.0070.07319.46
5.4.440.0000.07319.30
5.4.430.0070.04319.45
5.4.420.0070.07719.57
5.4.410.0030.04319.23
5.4.400.0070.06318.95
5.4.390.0000.07319.13
5.4.380.0030.04319.04
5.4.370.0000.04318.95
5.4.360.0030.07319.13
5.4.350.0000.04019.28
5.4.340.0030.05319.04
5.4.320.0030.03718.93
5.4.310.0070.07019.11
5.4.300.0000.04018.95
5.4.290.0000.04718.95
5.4.280.0000.07719.16
5.4.270.0030.07019.16
5.4.260.0030.03319.25
5.4.250.0000.05018.95
5.4.240.0030.03719.10
5.4.230.0000.06718.97
5.4.220.0000.07018.95
5.4.210.0000.04018.92
5.4.200.0000.08019.16
5.4.190.0000.07718.96
5.4.180.0000.08719.12
5.4.170.0030.07019.16
5.4.160.0000.07719.10
5.4.150.0030.07319.11
5.4.140.0030.04016.30
5.4.130.0000.06716.42
5.4.120.0000.05016.45
5.4.110.0000.06716.41
5.4.100.0030.04716.21
5.4.90.0030.07716.41
5.4.80.0030.03716.37
5.4.70.0130.05316.25
5.4.60.0000.04316.20
5.4.50.0000.05316.18
5.4.40.0000.04716.48
5.4.30.0030.07016.46
5.4.20.0000.05016.48
5.4.10.0030.07316.57
5.4.00.0000.06315.76
5.3.290.0000.03714.65
5.3.280.0000.05014.67
5.3.270.0070.05714.62
5.3.260.0000.05314.73
5.3.250.0070.07714.73
5.3.240.0000.07714.58
5.3.230.0070.05714.82
5.3.220.0000.06714.58
5.3.210.0070.09014.70
5.3.200.0070.06314.61
5.3.190.0000.07314.66
5.3.180.0030.07014.58
5.3.170.0030.04714.41
5.3.160.0070.05714.41
5.3.150.0030.07314.68
5.3.140.0030.07314.58
5.3.130.0000.07014.59
5.3.120.0030.03314.67
5.3.110.0030.03314.50
5.3.100.0070.06313.89
5.3.90.0000.05014.01
5.3.80.0070.07014.07
5.3.70.0000.07314.10
5.3.60.0100.03314.01
5.3.50.0030.06013.89
5.3.40.0000.03713.95
5.3.30.0000.03313.89
5.3.20.0000.03713.91
5.3.10.0000.03313.50
5.3.00.0000.05713.62
5.2.170.0000.06311.24
5.2.160.0070.02311.09
5.2.150.0000.04011.37
5.2.140.0000.03011.14
5.2.130.0030.05711.32
5.2.120.0000.03011.32
5.2.110.0000.02711.10
5.2.100.0030.03011.18
5.2.90.0030.02311.12
5.2.80.0030.04711.23
5.2.70.0000.06711.07
5.2.60.0070.02311.12
5.2.50.0000.03011.16
5.2.40.0030.05310.99
5.2.30.0030.04011.10
5.2.20.0000.03311.09
5.2.10.0070.02010.86
5.2.00.0000.03010.84
5.1.60.0000.0539.95
5.1.50.0000.0239.99
5.1.40.0000.02310.06
5.1.30.0000.02710.46
5.1.20.0030.03710.21
5.1.10.0000.04310.05
5.1.00.0070.05310.05
5.0.50.0000.0279.86
5.0.40.0000.0209.86
5.0.30.0000.0509.86
5.0.20.0000.0339.86
5.0.10.0000.0439.86
5.0.00.0030.0609.86
4.4.90.0000.0279.86
4.4.80.0000.0179.86
4.4.70.0030.0109.86
4.4.60.0000.0279.86
4.4.50.0000.0139.86
4.4.40.0000.0279.86
4.4.30.0000.0239.86
4.4.20.0000.0339.86
4.4.10.0000.0209.86
4.4.00.0030.0209.86
4.3.110.0030.0139.86
4.3.100.0000.0339.86
4.3.90.0000.0279.86
4.3.80.0000.0239.86
4.3.70.0000.0339.86
4.3.60.0000.0179.86
4.3.50.0000.0379.86
4.3.40.0000.0609.86
4.3.30.0070.0279.86
4.3.20.0000.0209.86
4.3.10.0000.0339.86
4.3.00.0000.0339.86

preferences:
53.78 ms | 401 KiB | 5 Q