3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcdefghijklmn"; $print = strrev($str); $st=""; $size = strlen($print); for($i = 0;$i<$size;$i=$i+2) { if($i+1 < $size ) $st .= substr($print,$i,$i+1); }echo $st;

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)
8.3.60.0150.00018.55
8.3.50.0200.01116.47
8.3.40.0090.00618.89
8.3.30.0070.00718.67
8.3.20.0000.00818.60
8.3.10.0040.00418.77
8.3.00.0100.00019.25
8.2.180.0090.00616.32
8.2.170.0030.01022.96
8.2.160.0000.01518.87
8.2.150.0080.00024.18
8.2.140.0130.00724.66
8.2.130.0070.00026.16
8.2.120.0070.00021.00
8.2.110.0060.00320.90
8.2.100.0080.00417.84
8.2.90.0000.00818.22
8.2.80.0000.00817.97
8.2.70.0050.00517.63
8.2.60.0000.00819.66
8.2.50.0030.00518.07
8.2.40.0040.00419.48
8.2.30.0040.00417.85
8.2.20.0070.00317.54
8.2.10.0040.00417.72
8.2.00.0040.00417.64
8.1.280.0070.00725.92
8.1.270.0040.00423.99
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0030.00623.86
8.1.230.0100.00020.85
8.1.220.0000.00917.74
8.1.210.0040.00418.93
8.1.200.0070.00417.23
8.1.190.0040.00417.23
8.1.180.0050.00318.10
8.1.170.0040.00418.82
8.1.160.0000.00719.05
8.1.150.0000.00718.52
8.1.140.0080.00017.30
8.1.130.0050.00217.30
8.1.120.0030.00317.31
8.1.110.0040.00417.27
8.1.100.0050.00317.44
8.1.90.0030.00317.27
8.1.80.0070.00017.30
8.1.70.0000.00717.36
8.1.60.0040.00417.49
8.1.50.0040.00417.42
8.1.40.0060.00317.50
8.1.30.0040.00417.60
8.1.20.0000.00717.58
8.1.10.0000.00817.50
8.1.00.0000.00717.45
8.0.300.0000.00719.89
8.0.290.0040.00416.63
8.0.280.0030.00618.59
8.0.270.0030.00517.34
8.0.260.0030.00316.85
8.0.250.0040.00416.92
8.0.240.0000.00816.86
8.0.230.0040.00416.93
8.0.220.0040.00416.81
8.0.210.0000.00816.82
8.0.200.0030.00316.77
8.0.190.0030.00516.95
8.0.180.0040.00416.82
8.0.170.0030.00616.88
8.0.160.0040.00416.84
8.0.150.0040.00416.79
8.0.140.0030.00416.79
8.0.130.0030.00313.21
8.0.120.0050.00316.73
8.0.110.0070.00016.76
8.0.100.0040.00416.69
8.0.90.0000.00716.84
8.0.80.0030.01116.85
8.0.70.0000.00716.79
8.0.60.0040.00416.84
8.0.50.0090.00016.89
8.0.30.0110.00816.94
8.0.20.0090.01017.28
8.0.10.0000.00716.77
8.0.00.0140.00716.77
7.4.330.0030.00212.91
7.4.320.0050.00316.36
7.4.300.0000.00716.43
7.4.290.0040.00416.43
7.4.280.0000.00816.36
7.4.270.0060.00616.45
7.4.260.0050.00013.32
7.4.250.0030.00516.45
7.4.240.0050.00316.46
7.4.230.0020.00516.44
7.4.220.0070.01016.52
7.4.210.0000.01416.53
7.4.200.0040.00416.61
7.4.190.0000.00716.62
7.4.160.0100.00716.66
7.4.150.0100.00716.35
7.4.140.0110.00717.86
7.4.130.0120.01216.59
7.4.120.0150.00316.51
7.4.110.0030.01316.41
7.4.100.0120.00916.41
7.4.90.0030.01716.42
7.4.80.0100.00719.39
7.4.70.0060.01316.33
7.4.60.0100.00616.41
7.4.50.0000.00416.52
7.4.40.0080.00816.24
7.4.30.0110.00616.43
7.4.00.0040.00814.75
7.3.330.0070.00013.05
7.3.320.0000.00713.09
7.3.310.0000.00716.34
7.3.300.0000.00616.25
7.3.290.0070.00816.25
7.3.280.0090.00616.28
7.3.270.0130.01016.54
7.3.260.0110.00616.52
7.3.240.0130.00316.27
7.3.230.0140.00316.43
7.3.210.0100.00716.54
7.3.200.0080.00816.41
7.3.190.0030.01316.24
7.3.180.0070.01316.32
7.3.170.0100.01016.58
7.3.160.0080.00816.36
7.3.120.0120.00414.72
7.2.330.0100.01016.55
7.2.320.0050.01116.63
7.2.310.0090.00916.50
7.2.300.0100.00616.57
7.2.290.0130.00716.71
7.1.70.0030.00317.27
7.1.60.0070.01519.25
7.1.50.0190.01634.57
7.1.00.0000.03722.30
7.0.200.0000.00916.63
7.0.140.0000.07722.06
7.0.120.0100.06322.09
7.0.60.0070.08319.91
7.0.50.0000.04317.80
7.0.40.0100.08319.96
7.0.30.0230.08020.13
7.0.20.0330.07020.16
7.0.10.0230.06320.18
7.0.00.0030.04720.20
5.6.280.0070.07020.90
5.6.210.0100.05020.50
5.6.200.0070.04318.16
5.6.190.0100.08020.60
5.6.180.0430.06720.67
5.6.170.0270.07320.49
5.6.160.0000.04320.45
5.6.150.0070.04018.13
5.6.140.0070.04018.18
5.6.130.0100.08018.14
5.6.120.0030.09021.04
5.6.110.0170.07020.98
5.6.100.0030.04721.11
5.6.90.0030.04321.00
5.6.80.0070.08020.41
5.6.70.3770.04020.53
5.5.350.0030.05020.43
5.5.340.0030.04017.96
5.5.330.0130.06720.23
5.5.320.0500.04720.40
5.5.310.0200.08020.29
5.5.300.0100.08317.98
5.5.290.0030.08318.02
5.5.280.0030.07020.87
5.5.270.0070.06020.73
5.5.260.0000.04720.67
5.5.250.0100.07320.70
5.5.240.0130.06320.23
5.4.450.0100.03319.47
5.4.440.0100.04019.44
5.4.430.0070.06719.32
5.4.420.0000.05719.40
5.4.410.0170.06319.11
5.4.400.0070.04019.18
5.4.390.0070.08019.08
5.4.380.0100.07019.14
5.4.370.0100.07018.92
5.4.360.0000.08319.18
5.4.350.0100.05718.92
5.4.340.0100.03719.08
5.4.320.0000.04318.92
5.4.310.0030.07719.18
5.4.300.0070.07019.08
5.4.290.0000.04719.08
5.4.280.0030.08318.79
5.4.270.0000.06719.00
5.4.260.0030.05018.93
5.4.250.0070.04019.17
5.4.240.0070.04019.17
5.4.230.0070.07319.08
5.4.220.0130.04318.78
5.4.210.0070.08018.91
5.4.200.0030.04018.78
5.4.190.0000.04319.16
5.4.180.0100.07319.17
5.4.170.0070.06718.80
5.4.160.0070.03318.89
5.4.150.0100.03319.09
5.4.140.0070.05316.21
5.4.130.0030.04316.24
5.4.120.0070.05316.27
5.4.110.0030.06716.39
5.4.100.0130.06716.60
5.4.90.0170.06716.35
5.4.80.0030.03716.59
5.4.70.0030.03716.22
5.4.60.0030.07716.22
5.4.50.0070.04716.38
5.4.40.0030.05316.25
5.4.30.0000.07716.21
5.4.20.0070.07316.22
5.4.10.0100.07316.23
5.4.00.0130.04015.77
5.3.290.0030.05014.48
5.3.280.0130.06314.47
5.3.270.0070.03714.53
5.3.260.0100.06714.52
5.3.250.0100.03714.70
5.3.240.0070.07714.53
5.3.230.0100.07314.61
5.3.220.0000.05714.48
5.3.210.0030.04014.53
5.3.200.0000.06014.51
5.3.190.0000.05714.50
5.3.180.0070.06014.52
5.3.170.0100.03014.54
5.3.160.0100.07314.58
5.3.150.0100.04714.48
5.3.140.0030.06714.48
5.3.130.0130.07314.35
5.3.120.0100.06714.52
5.3.110.0070.03714.50
5.3.100.0070.07314.01
5.3.90.0030.04013.94
5.3.80.0070.03713.84
5.3.70.0070.04013.94
5.3.60.0100.03313.93
5.3.50.0000.08013.88
5.3.40.0100.06313.87
5.3.30.0070.03313.83
5.3.20.0130.06713.63
5.3.10.0070.07713.76
5.3.00.0030.06013.56
5.2.170.0070.04311.07
5.2.160.0070.03011.00
5.2.150.0070.06011.21
5.2.140.0000.03311.13
5.2.130.0030.03311.03
5.2.120.0070.03010.93
5.2.110.0000.03711.04
5.2.100.0000.04311.11
5.2.90.0100.05311.03
5.2.80.0130.02711.04
5.2.70.0070.06011.03
5.2.60.0100.05310.95
5.2.50.0070.05011.00
5.2.40.0100.05310.98
5.2.30.0100.03710.95
5.2.20.0100.02710.77
5.2.10.0070.02710.90
5.2.00.0030.03710.76
5.1.60.0030.0539.89
5.1.50.0000.05310.03
5.1.40.0030.0539.94
5.1.30.0070.05010.41
5.1.20.0100.05010.23
5.1.10.0030.02710.06
5.1.00.0030.05710.02
5.0.50.0030.0278.54
5.0.40.0030.0438.42
5.0.30.0000.0438.37
5.0.20.0030.0238.37
5.0.10.0030.0438.37
5.0.00.0030.0608.37
4.4.90.0000.0208.37
4.4.80.0000.0378.37
4.4.70.0000.0208.37
4.4.60.0030.0178.37
4.4.50.0030.0138.37
4.4.40.0000.0578.37
4.4.30.0000.0238.37
4.4.20.0030.0238.37
4.4.10.0000.0338.37
4.4.00.0000.0438.37
4.3.110.0030.0278.37
4.3.100.0030.0338.37
4.3.90.0000.0338.37
4.3.80.0000.0478.37
4.3.70.0070.0138.37
4.3.60.0030.0338.37
4.3.50.0030.0308.37
4.3.40.0000.0308.37
4.3.30.0000.0208.37
4.3.20.0000.0238.37
4.3.10.0000.0238.37
4.3.00.0000.0278.37

preferences:
43.16 ms | 401 KiB | 5 Q