3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($i = 0; $i <= 10; $i += 1) { //loop to calculate parameters for substr $randomlettersnumbers = str_shuffle('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'); //creates a shuffled alphanumeric string $randomlettersnumbers2 = str_shuffle('0123456789!@#$%^&*()_+{}:|\<>?'); //creates a shuffled alphanumeric string $randcomb = $randomlettersnumbers.$randomlettersnumbers2; //$param1 = ($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)
7.3.120.0030.01514.81
7.3.110.0120.00314.93
7.3.100.0040.01414.56
7.3.90.0060.00614.78
7.3.80.0090.00414.72
7.3.70.0030.01214.80
7.3.60.0040.01114.68
7.3.50.0030.01014.55
7.3.40.0030.01014.84
7.3.30.0080.00414.63
7.3.20.0070.00316.43
7.3.10.0030.00716.43
7.3.00.0040.01116.34
7.2.240.0000.01514.98
7.2.230.0030.01415.07
7.2.220.0070.00714.97
7.2.210.0030.01014.90
7.2.200.0080.00414.97
7.2.190.0070.00715.09
7.2.180.0030.00914.83
7.2.170.0040.01115.04
7.2.160.0060.00914.76
7.2.150.0040.01216.88
7.2.140.0060.00916.88
7.2.130.0030.01316.78
7.2.120.0000.01616.94
7.2.110.0100.00717.04
7.2.100.0100.00716.80
7.2.90.0040.01116.82
7.2.80.0070.00716.79
7.2.70.0030.01317.03
7.2.60.0180.00616.80
7.2.50.0080.00516.79
7.2.40.0070.01116.83
7.2.30.0060.00916.75
7.2.20.0110.00316.77
7.2.10.0110.00716.97
7.2.00.0030.01118.31
7.1.330.0030.00915.70
7.1.320.0100.00315.54
7.1.310.0070.00715.79
7.1.300.0090.00315.71
7.1.290.0030.00615.73
7.1.280.0080.00415.57
7.1.270.0040.01215.65
7.1.260.0060.00915.82
7.1.250.0140.00015.85
7.1.200.0030.01115.54
7.1.100.0030.00917.97
7.1.70.0000.00817.18
7.1.60.0140.01119.46
7.1.50.0000.01117.07
7.1.00.0030.07722.51
7.0.200.0000.00816.64
7.0.140.0000.07721.95
7.0.60.0100.08021.73
7.0.50.0070.07317.66
7.0.40.0030.08720.32
7.0.30.0400.07320.13
7.0.20.0270.08320.09
7.0.10.0070.04020.12
7.0.00.0000.09020.16
5.6.280.0000.07320.92
5.6.210.0100.07320.67
5.6.200.0030.08318.22
5.6.190.0000.09320.63
5.6.180.0200.04320.35
5.6.170.0230.08020.52
5.6.160.0200.07320.54
5.6.150.0000.04318.22
5.6.140.0070.06318.13
5.6.130.0130.07718.14
5.6.120.0100.08020.98
5.6.110.0200.06721.11
5.6.100.0100.08021.12
5.6.90.0070.04321.13
5.6.80.0200.06720.37
5.5.350.0070.06020.33
5.5.340.0070.06718.02
5.5.330.0030.08320.06
5.5.320.0270.07720.20
5.5.310.0230.06320.34
5.5.300.0100.07717.92
5.5.290.0070.07317.96
5.5.280.0070.05020.89
5.5.270.0030.07720.86
5.5.260.0100.04320.77
5.5.250.0100.07720.68
5.5.240.0130.07320.18
5.4.450.0130.03019.48
5.4.440.0000.04019.11
5.4.430.0070.03719.11
5.4.420.0030.04019.39
5.4.410.0030.08319.11
5.4.400.0030.03719.16
5.4.390.0100.04319.09
5.4.380.0030.03718.79
5.4.370.0100.07319.14
5.4.360.0030.07719.11
5.4.350.0030.08319.08
5.4.340.0030.08019.09
5.4.320.0100.04018.79
5.4.310.0070.08019.08
5.4.300.0000.05719.11
5.4.290.0100.07318.80
5.4.280.0030.05018.79
5.4.270.0070.07319.07
5.4.260.0130.07019.17
5.4.250.0100.06718.91
5.4.240.0100.05019.17
5.4.230.0070.07719.00
5.4.220.0070.06719.20
5.4.210.0130.05318.78
5.4.200.0230.04019.11
5.4.190.0070.07319.14
5.4.180.0070.06719.07
5.4.170.0070.03719.07
5.4.160.0000.05719.10
5.4.150.0030.06719.09
5.4.140.0130.07016.17
5.4.130.0200.06016.39
5.4.120.0200.05716.34
5.4.110.0100.06016.14
5.4.100.0070.05716.40
5.4.90.0000.07316.29
5.4.80.0070.07016.35
5.4.70.0200.06316.23
5.4.60.0130.06716.28
5.4.50.0070.07316.34
5.4.40.0100.06716.30
5.4.30.0130.07016.29
5.4.20.0070.04716.21
5.4.10.0100.04316.24
5.4.00.0000.04015.75
5.3.290.0130.07314.60
5.3.280.0100.04014.68
5.3.270.0170.06714.50
5.3.260.0100.06314.71
5.3.250.0030.08314.55
5.3.240.0070.07014.43
5.3.230.0000.08014.55
5.3.220.0170.06714.48
5.3.210.0100.07014.48
5.3.200.0000.07714.38
5.3.190.0100.07014.48
5.3.180.0070.07314.44
5.3.170.0170.05014.44
5.3.160.0070.05014.50
5.3.150.0170.06014.48
5.3.140.0270.03014.48
5.3.130.0030.08314.45
5.3.120.0030.08314.48
5.3.110.0170.07714.51
5.3.100.0000.07714.00
5.3.90.0070.03713.84
5.3.80.0070.07313.84
5.3.70.0130.06013.96
5.3.60.0200.06013.96
5.3.50.0130.07713.87
5.3.40.0070.03713.96
5.3.30.0070.04313.93
5.3.20.0000.04013.48
5.3.10.0030.08013.59
5.3.00.0070.04013.56
5.2.170.0000.06711.13
5.2.160.0030.04711.13
5.2.150.0030.03011.13
5.2.140.0030.03311.14
5.2.130.0030.06711.08
5.2.120.0070.06311.00
5.2.110.0070.06311.03
5.2.100.0070.03310.93
5.2.90.0030.05311.25
5.2.80.0170.05310.95
5.2.70.0070.05011.09
5.2.60.0030.07011.20
5.2.50.0070.05010.91
5.2.40.0070.04011.14
5.2.30.0000.07010.79
5.2.20.0170.04311.04
5.2.10.0030.03310.86
5.2.00.0070.06310.72
5.1.60.0100.0479.94
5.1.50.0100.0339.95
5.1.40.0030.0539.89
5.1.30.0070.05710.22
5.1.20.0070.05310.34
5.1.10.0100.04010.03
5.1.00.0000.03310.03
5.0.50.0030.0238.50
5.0.40.0000.0478.39
5.0.30.0000.0678.23
5.0.20.0030.0308.23
5.0.10.0030.0508.23
5.0.00.0070.0638.30
4.4.90.0030.0378.23
4.4.80.0000.0378.23
4.4.70.0000.0178.23
4.4.60.0030.0408.23
4.4.50.0000.0378.23
4.4.40.0070.0508.23
4.4.30.0000.0208.23
4.4.20.0030.0338.23
4.4.10.0000.0338.23
4.4.00.0000.0338.23
4.3.110.0000.0278.23
4.3.100.0070.0308.23
4.3.90.0000.0278.23
4.3.80.0030.0508.23
4.3.70.0030.0278.23
4.3.60.0030.0208.23
4.3.50.0030.0238.23
4.3.40.0030.0508.23
4.3.30.0000.0278.23
4.3.20.0000.0408.23
4.3.10.0000.0378.23
4.3.00.0000.0238.23

preferences:
40.54 ms | 401 KiB | 5 Q