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) { $characters_a = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; } switch ($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 . $chars_num; } for ($i = 0; $i < $charCount; $i++) { $rand .= $chars[mt_rand(0, strlen($characters) - 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)
7.3.10.0040.00716.55
7.3.00.0030.01016.70
7.2.130.0090.00617.06
7.2.120.0060.00916.96
7.2.110.0080.00416.95
7.2.100.0040.00817.03
7.2.90.0030.01417.02
7.2.80.0110.00416.81
7.2.70.0060.00617.01
7.2.60.0060.00617.08
7.2.50.0090.00317.08
7.2.40.0090.00316.76
7.2.30.0000.01416.98
7.2.20.0000.01217.06
7.2.10.0060.00916.70
7.2.00.0040.01018.35
7.1.250.0030.01215.79
7.1.70.0030.00616.99
7.1.60.0030.02119.40
7.1.50.0140.00716.70
7.1.00.0030.06722.37
7.0.200.0070.00314.91
7.0.140.0070.07022.10
7.0.120.0000.07722.00
7.0.60.0100.05720.07
7.0.50.0100.05317.91
7.0.40.0300.08020.11
7.0.30.0500.04020.17
7.0.20.0370.07720.10
7.0.10.0300.05320.11
7.0.00.0330.07720.18
5.6.210.0000.08720.63
5.6.200.0170.07718.27
5.6.190.0330.07720.60
5.6.180.0300.04720.46
5.6.170.0370.07020.57
5.6.160.0370.07720.47
5.6.150.0470.06320.43
5.6.140.0370.07020.19
5.6.130.0270.04720.32
5.6.120.0370.07020.40
5.6.110.0230.05020.32
5.6.100.0330.08720.33
5.6.90.0370.07020.42
5.6.80.0270.04319.67
5.6.70.0330.06319.56
5.6.60.0330.07319.71
5.6.50.0230.05019.76
5.6.40.0400.06319.57
5.6.30.0230.05019.77
5.6.20.0330.04019.86
5.6.10.0400.07019.73
5.6.00.0300.07719.69
5.5.350.0270.08020.45
5.5.340.0170.04317.92
5.5.330.0330.07320.44
5.5.320.0370.04320.37
5.5.310.0330.07020.31
5.5.300.0230.04320.17
5.5.290.0270.04719.97
5.5.280.0400.07320.17
5.5.270.0300.04720.20
5.5.260.0230.07020.20
5.5.250.0370.07319.79
5.5.240.0270.04019.70
5.5.230.0430.06319.37
5.5.220.0430.07019.35
5.5.210.0330.06319.35
5.5.200.0470.06319.39
5.5.190.0330.06719.34
5.5.180.0270.04719.57
5.5.160.0300.04019.52
5.5.150.0330.07719.54
5.5.140.0370.03719.32
5.5.130.0200.06319.66
5.5.120.0270.07019.64
5.5.110.0270.05319.51
5.5.100.0400.06019.38
5.5.90.0230.04719.22
5.5.80.0370.07019.38
5.5.70.0230.06319.38
5.5.60.0230.04719.38
5.5.50.0330.07019.23
5.5.40.0270.04319.61
5.5.30.0300.07319.61
5.5.20.0270.05719.27
5.5.10.0330.07319.61
5.5.00.0300.07319.19
5.4.450.0200.04319.48
5.4.440.0230.07319.53
5.4.430.0400.05719.57
5.4.420.0300.05319.49
5.4.410.0270.07019.29
5.4.400.0300.04019.16
5.4.390.0330.03718.86
5.4.380.0370.05019.15
5.4.370.0470.05319.01
5.4.360.0330.06719.25
5.4.350.0270.06318.98
5.4.340.0230.05019.15
5.4.320.0370.06318.88
5.4.310.0230.06019.25
5.4.300.0270.04019.15
5.4.290.0230.04718.88
5.4.280.0230.05018.85
5.4.270.0270.04719.24
5.4.260.0330.03718.91
5.4.250.0200.04319.14
5.4.240.0200.05719.14
5.4.230.0300.07319.01
5.4.220.0400.04019.15
5.4.210.0300.04019.23
5.4.200.0330.06318.85
5.4.190.0300.06319.11
5.4.180.0230.05719.20
5.4.170.0270.04719.14
5.4.160.0330.06019.18
5.4.150.0300.04019.13
5.4.140.0430.06016.36
5.4.130.0270.05716.35
5.4.120.0400.05016.34
5.4.110.0300.03316.54
5.4.100.0230.04016.26
5.4.90.0230.03716.47
5.4.80.0230.08716.29
5.4.70.0330.04316.38
5.4.60.0330.06316.43
5.4.50.0370.05316.39
5.4.40.0230.03716.37
5.4.30.0300.06716.34
5.4.20.0370.03316.36
5.4.10.0270.04016.27
5.4.00.0370.06715.84
5.3.290.0330.07314.71
5.3.280.0370.05314.64
5.3.270.0300.07714.64
5.3.260.0330.06714.65
5.3.250.0270.07314.63
5.3.240.0600.05014.59
5.3.230.0300.06714.61
5.3.220.0270.06014.57
5.3.210.0330.07014.57
5.3.200.0330.04314.62
5.3.190.0300.04014.57
5.3.180.0330.04014.61
5.3.170.0370.06314.46
5.3.160.0330.06014.72
5.3.150.0270.04314.58
5.3.140.0270.03714.56
5.3.130.0230.04714.60
5.3.120.0330.06014.54
5.3.110.0330.06714.60
5.3.100.0370.04713.98
5.3.90.0300.03714.02
5.3.80.0270.04014.07
5.3.70.0200.04014.06
5.3.60.0330.06714.06
5.3.50.0230.03713.98
5.3.40.0230.04313.89
5.3.30.0300.07313.96
5.3.20.0330.03713.83
5.3.10.0370.05313.83
5.3.00.0330.06713.83
5.2.170.0230.02713.83
5.2.160.0230.03313.83
5.2.150.0230.05713.83
5.2.140.0300.03713.83
5.2.130.0270.03013.83
5.2.120.0230.02713.83
5.2.110.0270.05713.83
5.2.100.0200.03713.83
5.2.90.0230.03013.84
5.2.80.0230.03013.84
5.2.70.0300.05713.84
5.2.60.0300.05313.84
5.2.50.0330.04013.84
5.2.40.0230.04013.84
5.2.30.0230.05713.84
5.2.20.0270.03013.84
5.2.10.0200.02713.84
5.2.00.0170.03013.84
5.1.60.0170.02713.84
5.1.50.0230.04013.84
5.1.40.0170.04713.84
5.1.30.0200.03713.84
5.1.20.0230.04013.84
5.1.10.0230.05313.84
5.1.00.0170.04313.84
5.0.50.0130.03713.84
5.0.40.0130.04013.84
5.0.30.0130.05713.84
5.0.20.0070.04313.84
5.0.10.0100.04313.84
5.0.00.0130.06313.84
4.4.90.0100.02013.84
4.4.80.0070.02013.84
4.4.70.0100.03713.84
4.4.60.0230.02313.84
4.4.50.0100.01713.84
4.4.40.0170.01713.84
4.4.30.0130.03713.84
4.4.20.0070.02713.84
4.4.10.0100.03313.84
4.4.00.0130.05313.84
4.3.110.0100.03713.84
4.3.100.0130.03313.84
4.3.90.0100.03713.84
4.3.80.0100.05713.84
4.3.70.0100.02313.84
4.3.60.0070.03313.84
4.3.50.0100.03013.84
4.3.40.0070.05013.84
4.3.30.0100.03313.84
4.3.20.0070.03713.84
4.3.10.0000.03313.84
4.3.00.0100.03013.84

preferences:
38.07 ms | 401 KiB | 5 Q