3v4l.org

run code in 300+ PHP versions simultaneously
<?php $randomlettersnumbers = str_shuffle('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'); //creates a shuffled alphanumeric string $randomlettersnumbers2 = str_shuffle('0123456789!@#$%^&*()_+{}:|\<>?'); //creates a shuffled alphanumeric string $randcomb = $randomlettersnumbers.$randomlettersnumbers2; for($i = 0; $i <= 10; $i += 1) { //loop to calculate parameters for substr //$param1 = ($i+6) - 6; //this formula ensures all integers are positive and above zero //$param2 = $param1 + 6; // this formula ensures all integers increment by 6 spaces //if($param2 >= 60) { //since the second parameter goes over 60 // $param2 = ($param1 + 6) - 6; //subtract 6 //} $key = substr($randcomb, $param1, $param2); //generate random key //echo $key."<BR>"; //display it for debugging echo substr($randcomb, 0,6); }

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)
7.2.60.0000.01416.59
7.2.00.0060.00919.54
7.1.100.0000.00918.45
7.1.70.0090.00616.94
7.1.60.0070.01719.40
7.1.50.0140.00717.02
7.1.00.0030.07022.51
7.0.200.0050.00216.75
7.0.140.0000.07321.95
7.0.60.0030.05020.04
7.0.50.0000.08017.80
7.0.40.3630.03720.03
7.0.30.3330.03720.21
7.0.20.0030.08720.16
7.0.10.0170.07720.16
7.0.00.3770.04020.13
5.6.280.0030.07320.95
5.6.210.0070.07720.65
5.6.200.0170.08018.09
5.6.190.3570.04320.33
5.6.180.3630.04720.38
5.6.170.2830.03020.45
5.6.160.4170.04320.46
5.6.150.4030.04020.21
5.6.140.3600.03720.25
5.6.130.3430.03720.30
5.6.120.0900.04320.37
5.6.110.3230.04020.34
5.6.100.3900.03720.20
5.6.90.3470.05020.25
5.6.80.3200.04319.53
5.6.70.3770.04019.61
5.6.60.3500.04319.63
5.6.50.3770.04019.64
5.6.40.3470.04019.62
5.6.30.3800.05019.63
5.6.20.3830.03719.53
5.6.10.3600.03719.50
5.6.00.3530.04319.59
5.5.350.3100.03320.43
5.5.340.0070.08018.02
5.5.330.1470.05020.24
5.5.320.3830.04720.18
5.5.310.0030.04320.26
5.5.300.3330.04020.05
5.5.290.4200.04020.14
5.5.280.0130.07720.05
5.5.270.3430.04020.15
5.5.260.4200.04020.04
5.5.250.3230.04019.91
5.5.240.3530.04319.32
5.5.230.3870.04319.55
5.5.220.3200.04019.40
5.5.210.3430.04319.42
5.5.200.3630.03319.42
5.5.190.3630.04019.40
5.5.180.3630.04019.52
5.5.160.3200.04019.61
5.5.150.3670.04019.52
5.5.140.4170.04019.41
5.5.130.4600.05019.52
5.5.120.3700.03719.45
5.5.110.3770.03719.43
5.5.100.3600.04019.27
5.5.90.3630.03719.32
5.5.80.3730.04719.30
5.5.70.3900.03719.39
5.5.60.3370.04319.32
5.5.50.3270.04019.29
5.5.40.3070.03319.24
5.5.30.3330.03719.26
5.5.20.3300.03719.32
5.5.10.3370.03319.41
5.5.00.3600.03719.49
5.4.450.3700.04019.32
5.4.440.0130.07019.42
5.4.430.4030.04019.31
5.4.420.3930.03319.41
5.4.410.4430.04719.32
5.4.400.3500.03718.99
5.4.390.3500.04019.12
5.4.380.3200.03718.99
5.4.370.3770.03719.02
5.4.360.3300.04019.10
5.4.350.3500.03718.83
5.4.340.3830.03319.08
5.4.320.3570.04019.04
5.4.310.4030.04318.97
5.4.300.3930.03318.99
5.4.290.4130.04318.93
5.4.280.3730.03319.07
5.4.270.3500.03718.99
5.4.260.3730.04018.95
5.4.250.3400.03019.09
5.4.240.4200.04019.03
5.4.230.4070.04019.12
5.4.220.3270.04019.07
5.4.210.3330.03019.12
5.4.200.3300.03318.97
5.4.190.3230.04019.11
5.4.180.3570.02719.01
5.4.170.3400.04018.95
5.4.160.3500.03719.11
5.4.150.3870.04018.96
5.4.140.3870.03716.42
5.4.130.4170.04016.17
5.4.120.3530.03716.36
5.4.110.3300.03716.39
5.4.100.3770.03316.39
5.4.90.4270.03316.44
5.4.80.3870.03716.55
5.4.70.4270.03316.24
5.4.60.4000.03016.34
5.4.50.4370.02716.22
5.4.40.3800.03316.28
5.4.30.4100.03016.25
5.4.20.4070.02716.25
5.4.10.3600.03316.46
5.4.00.4200.03715.81
5.3.290.3670.04014.60
5.3.280.3330.03314.55
5.3.270.3330.03314.54
5.3.260.3330.03314.52
5.3.250.4070.03314.46
5.3.240.4130.04314.43
5.3.230.3700.04314.52
5.3.220.3370.03014.48
5.3.210.3230.03714.39
5.3.200.3600.04014.55
5.3.190.4130.04014.53
5.3.180.4070.03014.48
5.3.170.4030.03714.42
5.3.160.4030.04014.50
5.3.150.4000.04014.39
5.3.140.4170.03714.41
5.3.130.4130.03714.49
5.3.120.3830.04014.51
5.3.110.4030.03714.52
5.3.100.4230.03314.01
5.3.90.4170.03013.94
5.3.80.3630.04013.93
5.3.70.3800.04313.78
5.3.60.4200.03713.96
5.3.50.4170.03713.71
5.3.40.3570.03713.86
5.3.30.1700.03713.68
5.3.20.0070.07313.61
5.3.10.3970.02713.60
5.3.00.3770.03713.57
5.2.170.3600.03010.98
5.2.160.3300.03311.13
5.2.150.3400.03311.06
5.2.140.0030.04311.03
5.2.130.0030.05011.10
5.2.120.2970.03011.05
5.2.110.3430.03311.07
5.2.100.3170.03311.04
5.2.90.3370.03310.89
5.2.80.3600.02711.07
5.2.70.3470.03310.98
5.2.60.3300.02311.00
5.2.50.3400.03010.87
5.2.40.2870.03310.82
5.2.30.2770.02310.95
5.2.20.2730.03010.89
5.2.10.2630.02710.85
5.2.00.2630.02710.71
5.1.60.2730.02010.04
5.1.50.2300.0279.96
5.1.40.0070.0539.80
5.1.30.0100.04310.37
5.1.20.0070.03010.37
5.1.10.0030.06310.00
5.1.00.0770.02710.07
5.0.50.1470.0238.45
5.0.40.1530.0238.44
5.0.30.1700.0308.36
5.0.20.1530.0208.25
5.0.10.1600.0238.38
5.0.00.1370.0308.22
4.4.90.1630.0207.29
4.4.80.1600.0177.29
4.4.70.1570.0177.29
4.4.60.1370.0137.29
4.4.50.1330.0137.29
4.4.40.1530.0277.29
4.4.30.1570.0137.29
4.4.20.0100.0277.29
4.4.10.1430.0137.29
4.4.00.1330.0237.29
4.3.110.1570.0207.30
4.3.100.1570.0177.30
4.3.90.1330.0177.30
4.3.80.1700.0277.30
4.3.70.1600.0177.30
4.3.60.1430.0107.30
4.3.50.1630.0077.30
4.3.40.1300.0277.30
4.3.30.0900.0237.30
4.3.20.0730.0137.30
4.3.10.0770.0177.30
4.3.00.0870.0177.30

preferences:
39.78 ms | 401 KiB | 5 Q