3v4l.org

run code in 300+ PHP versions simultaneously
<?php function random_string($charcount = 8, $mode = 0, $capsonly = 0) { /* 0 = alphanumeric 1 = letters only 2 = numbers only */ $chars_alpha_cap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; $chars_alpha_low = 'abcdefghijklmnopqrstuvwxyz'; $chars_num = '0123456789'; if ($capsonly) { $chars_alpha_cap = ''; $chars_alpha_low = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; } switch ($mode) { case 1: $chars = $chars_alpha_cap . $chars_alpha_low; break; case 2: $chars = $chars_num; break; default: $chars = $chars_alpha_cap . $chars_alpha_low . $chars_num; } $rand = false; for ($i = 0; $i < $charcount; $i++) { $rand .= $chars[mt_rand(0, strlen($chars) - 1)]; } return $rand; } echo random_string(32,0,0);

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)
7.3.10.0090.00316.68
7.3.00.0040.01216.89
7.2.130.0050.00516.99
7.2.120.0000.01417.05
7.2.110.0090.00317.10
7.2.100.0000.01416.97
7.2.90.0030.01317.03
7.2.80.0000.01316.63
7.2.70.0090.00616.82
7.2.60.0030.00917.10
7.2.50.0000.00916.98
7.2.40.0040.00816.79
7.2.30.0070.00716.70
7.2.20.0030.01016.98
7.2.10.0060.00617.02
7.2.00.0050.00818.05
7.1.250.0090.00615.75
7.1.70.0000.01017.00
7.1.60.0100.01319.70
7.1.50.0030.01417.12
7.1.00.0100.07022.35
7.0.200.0000.01416.88
7.0.140.0000.07722.01
7.0.100.0000.08719.96
7.0.90.0030.05319.96
7.0.80.0030.06019.90
7.0.70.0030.05319.88
7.0.60.0030.08319.96
7.0.50.0030.08720.30
7.0.40.0000.07719.96
7.0.30.0200.04020.16
7.0.20.0070.05320.10
7.0.10.0100.07720.06
7.0.00.0130.07320.12
5.6.280.0100.06720.82
5.6.250.0100.06020.68
5.6.240.0170.06720.69
5.6.230.0030.05320.66
5.6.220.0130.04320.53
5.6.210.0070.08720.75
5.6.200.0200.06721.06
5.6.190.0000.09020.96
5.6.180.0130.08020.89
5.6.170.0070.08021.03
5.6.160.0270.06321.02
5.6.150.0030.07321.04
5.6.140.0030.08721.02
5.6.130.0070.06720.95
5.6.120.0070.07720.98
5.6.110.0130.07721.07
5.6.100.0100.04321.04
5.6.90.0130.08021.00
5.6.80.0130.07720.34
5.6.70.0170.04720.38
5.6.60.0200.06020.30
5.6.50.0070.08320.35
5.6.40.0070.07720.32
5.6.30.0170.06020.41
5.6.20.0130.06720.37
5.6.10.0070.04720.32
5.6.00.0130.07020.42
5.5.380.0130.07320.41
5.5.370.0130.07720.45
5.5.360.0000.09020.40
5.5.350.0230.06720.41
5.5.340.0030.08720.93
5.5.330.0070.08020.95
5.5.320.0070.05020.61
5.5.310.0130.08020.91
5.5.300.0070.08320.80
5.5.290.0100.08020.91
5.5.280.0070.08020.80
5.5.270.0070.06320.73
5.5.260.0000.09320.88
5.5.250.0100.08020.70
5.5.240.0100.07320.12
5.5.230.0070.07720.26
5.5.220.0070.07720.25
5.5.210.0270.06020.25
5.5.200.0100.07320.18
5.5.190.0130.08019.99
5.5.180.0100.06320.28
5.5.160.0170.06320.13
5.5.150.0170.05720.12
5.5.140.0030.08720.19
5.5.130.0100.07320.09
5.5.120.0130.07020.15
5.5.110.0100.08320.17
5.5.100.0130.07320.14
5.5.90.0030.07720.16
5.5.80.0100.07320.11
5.5.70.0030.07020.05
5.5.60.0070.07720.00
5.5.50.0100.07020.00
5.5.40.0130.06320.00
5.5.30.0070.07320.15
5.5.20.0030.08720.06
5.5.10.0030.08020.11
5.5.00.0170.06720.05
5.4.450.0070.06719.18
5.4.440.0100.07319.58
5.4.430.0030.08019.20
5.4.420.0300.06719.51
5.4.410.0070.07719.33
5.4.400.0100.05718.86
5.4.390.0070.04719.17
5.4.380.0100.07319.05
5.4.370.0070.06319.14
5.4.360.0130.06719.13
5.4.350.0030.04319.14
5.4.340.0030.07318.95
5.4.320.0170.06318.90
5.4.310.0100.07318.96
5.4.300.0130.06719.10
5.4.290.0130.06319.23
5.4.280.0100.07019.20
5.4.270.0100.07718.88
5.4.260.0000.08319.05
5.4.250.0070.08019.16
5.4.240.0070.06019.13
5.4.230.0030.08718.90
5.4.220.0100.07019.07
5.4.210.0130.06319.25
5.4.200.0030.08319.16
5.4.190.0000.08319.02
5.4.180.0070.07719.17
5.4.170.0100.07318.87
5.4.160.0070.04319.16
5.4.150.0030.05019.06
5.4.140.0070.07316.45
5.4.130.0070.05316.41
5.4.120.0130.06016.41
5.4.110.0030.04316.36
5.4.100.0070.03716.39
5.4.90.0000.04016.36
5.4.80.0070.05016.49
5.4.70.0070.03016.32
5.4.60.0070.03316.48
5.4.50.0000.04716.35
5.4.40.0070.03716.39
5.4.30.0000.05316.42
5.4.20.0000.03716.44
5.4.10.0000.04016.44
5.4.00.0070.06715.91
5.3.290.0100.07314.61
5.3.280.0030.08314.57
5.3.270.0070.08314.56
5.3.260.0030.08314.72
5.3.250.0070.07714.73
5.3.240.0030.07714.64
5.3.230.0130.05714.53
5.3.220.0100.07314.63
5.3.210.0030.04714.49
5.3.200.0100.03314.54
5.3.190.0030.03714.68
5.3.180.0000.04014.59
5.3.170.0070.04014.66
5.3.160.0070.03314.68
5.3.150.0000.05014.66
5.3.140.0000.04014.57
5.3.130.0000.04014.48
5.3.120.0000.04014.68
5.3.110.0030.04714.69
5.3.100.0030.05714.14
5.3.90.0130.06014.11
5.3.80.0070.04714.05
5.3.70.0000.04314.16
5.3.60.0070.03314.11
5.3.50.0000.04013.96
5.3.40.0000.03714.08
5.3.30.0070.03313.82
5.3.20.0000.03713.71
5.3.10.0030.04713.67
5.3.00.0030.03713.67
5.2.170.0000.03711.26
5.2.160.0070.04311.21
5.2.150.0000.03011.09
5.2.140.0030.03011.15
5.2.130.0000.03011.21
5.2.120.0030.03011.01
5.2.110.0070.02711.05
5.2.100.0030.02711.23
5.2.90.0000.03011.16
5.2.80.0030.02711.13
5.2.70.0070.04711.15
5.2.60.0000.03010.97
5.2.50.0000.03010.97
5.2.40.0030.02711.08
5.2.30.0030.02710.97
5.2.20.0000.03010.97
5.2.10.0000.03010.73
5.2.00.0000.03010.63
5.1.60.0000.02710.03
5.1.50.0000.03010.07
5.1.40.0070.02310.08
5.1.30.0000.04710.35
5.1.20.0000.02710.38
5.1.10.0030.02310.14
5.1.00.0030.02310.06
5.0.50.0000.0238.55
5.0.40.0030.0378.46
5.0.30.0000.0408.31
5.0.20.0070.0378.12
5.0.10.0000.0478.19
5.0.00.0030.0608.26
4.4.90.0070.0138.05
4.4.80.0000.0208.05
4.4.70.0000.0178.05
4.4.60.0070.0108.05
4.4.50.0030.0138.05
4.4.40.0000.0238.05
4.4.30.0000.0178.05
4.4.20.0000.0278.05
4.4.10.0000.0178.05
4.4.00.0000.0378.05
4.3.110.0030.0308.05
4.3.100.0000.0338.05
4.3.90.0100.0208.05
4.3.80.0000.0408.05
4.3.70.0000.0378.05
4.3.60.0000.0308.05
4.3.50.0030.0308.05
4.3.40.0030.0438.05
4.3.30.0030.0238.05
4.3.20.0030.0338.05
4.3.10.0000.0378.05
4.3.00.0100.0208.05

preferences:
45.01 ms | 401 KiB | 5 Q