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(32,1,1);

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)
7.2.00.0040.01119.12
7.1.70.0000.00917.33
7.1.60.0140.01019.17
7.1.50.0200.02034.83
7.1.00.0070.06322.36
7.0.200.0040.00416.66
7.0.140.0030.09722.04
7.0.100.0100.08319.96
7.0.90.0170.06319.88
7.0.80.0170.03019.93
7.0.70.0100.04719.92
7.0.60.0070.06320.06
7.0.50.0130.04720.25
7.0.40.0070.07320.00
7.0.30.0030.04020.04
7.0.20.0030.04720.18
7.0.10.0030.04019.99
7.0.00.0030.04320.13
5.6.280.0170.06320.78
5.6.250.0000.08020.55
5.6.240.0070.04320.60
5.6.230.0070.04020.54
5.6.220.0130.07320.65
5.6.210.0070.03720.46
5.6.200.0130.05721.05
5.6.190.0030.04321.17
5.6.180.0030.05021.02
5.6.170.0100.03721.02
5.6.160.0100.03721.00
5.6.150.0130.06321.11
5.6.140.0000.04020.94
5.6.130.0000.05021.17
5.6.120.0000.05021.07
5.6.110.0130.07720.96
5.6.100.0130.05720.93
5.6.90.0100.07020.94
5.6.80.0200.07020.35
5.6.70.0030.08020.52
5.6.60.0100.07720.49
5.6.50.0030.05020.34
5.6.40.0070.05320.38
5.6.30.0030.05720.45
5.6.20.0030.08320.37
5.6.10.0170.07320.29
5.6.00.0170.06020.26
5.5.380.0070.04320.50
5.5.370.0030.04020.36
5.5.360.0100.05720.52
5.5.350.0100.04320.39
5.5.340.0130.03020.92
5.5.330.0030.04320.74
5.5.320.0130.03320.88
5.5.310.0170.02320.78
5.5.300.0000.04320.88
5.5.290.0030.04320.77
5.5.280.0000.04720.74
5.5.270.0030.06020.89
5.5.260.0130.05720.91
5.5.250.0170.07320.63
5.5.240.0130.06320.12
5.5.230.0070.07720.25
5.5.220.0130.04020.21
5.5.210.0030.05020.27
5.5.200.0100.08020.27
5.5.190.0100.08020.13
5.5.180.0170.07020.24
5.5.160.0070.08020.14
5.5.150.0130.07020.20
5.5.140.0000.07720.12
5.5.130.0100.07020.23
5.5.120.0100.08020.26
5.5.110.0200.07320.19
5.5.100.0100.08020.11
5.5.90.0100.06720.09
5.5.80.0070.08020.05
5.5.70.0200.06320.16
5.5.60.0070.04320.11
5.5.50.0030.07720.20
5.5.40.0100.07720.13
5.5.30.0200.03720.15
5.5.20.0030.08020.00
5.5.10.0030.05020.06
5.5.00.0070.08020.04
5.4.450.0070.08019.20
5.4.440.0030.04019.46
5.4.430.0070.08319.22
5.4.420.0070.08719.53
5.4.410.0030.05719.29
5.4.400.0270.03719.04
5.4.390.0100.06319.03
5.4.380.0170.06719.12
5.4.370.0030.07318.85
5.4.360.0100.07319.16
5.4.350.0070.07018.95
5.4.340.0030.08319.14
5.4.320.0070.07719.23
5.4.310.0100.06019.03
5.4.300.0130.07719.22
5.4.290.0200.06319.04
5.4.280.0100.08719.04
5.4.270.0070.05718.96
5.4.260.0070.07719.18
5.4.250.0100.07319.08
5.4.240.0070.08319.16
5.4.230.0070.06319.02
5.4.220.0070.06019.20
5.4.210.0070.07719.18
5.4.200.0000.06319.11
5.4.190.0170.06719.22
5.4.180.0070.07019.13
5.4.170.0100.06019.03
5.4.160.0070.06019.02
5.4.150.0070.04719.11
5.4.140.0030.05316.50
5.4.130.0070.05716.39
5.4.120.0170.06716.40
5.4.110.0070.07316.42
5.4.100.0070.06316.48
5.4.90.0030.08016.27
5.4.80.0070.07016.39
5.4.70.0070.07716.42
5.4.60.0130.06316.41
5.4.50.0070.07316.32
5.4.40.0030.07716.45
5.4.30.0070.07016.39
5.4.20.0070.07316.32
5.4.10.0130.06716.24
5.4.00.0070.07015.94
5.3.290.0130.07014.73
5.3.280.0070.07714.70
5.3.270.0170.06714.73
5.3.260.0100.07314.52
5.3.250.0130.06314.57
5.3.240.0070.07314.53
5.3.230.0070.04014.66
5.3.220.0070.06714.57
5.3.210.0170.06314.67
5.3.200.0100.07014.52
5.3.190.0100.07014.70
5.3.180.0130.06314.61
5.3.170.0070.07314.48
5.3.160.0100.07314.63
5.3.150.0170.06714.58
5.3.140.0030.07714.48
5.3.130.0100.06714.66
5.3.120.0000.05014.57
5.3.110.0100.08014.51
5.3.100.0070.07314.01
5.3.90.0000.08714.08
5.3.80.0070.07314.11
5.3.70.0030.05714.08
5.3.60.0130.06713.93
5.3.50.0070.08014.00
5.3.40.0130.06713.98
5.3.30.0070.07314.04
5.3.20.0070.06713.79
5.3.10.0030.08013.75
5.3.00.0030.03713.70
5.2.170.0130.05711.25
5.2.160.0030.06311.23
5.2.150.0070.06311.23
5.2.140.0070.06311.06
5.2.130.0000.07011.19
5.2.120.0130.06011.20
5.2.110.0130.04710.95
5.2.100.0030.06311.11
5.2.90.0070.06311.11
5.2.80.0000.05710.98
5.2.70.0230.04711.04
5.2.60.0070.05711.09
5.2.50.0030.06010.94
5.2.40.0070.06310.98
5.2.30.0070.06011.03
5.2.20.0100.05710.86
5.2.10.0100.05310.91
5.2.00.0000.06010.73
5.1.60.0100.05310.09
5.1.50.0000.04010.03
5.1.40.0070.0439.96
5.1.30.0070.04310.39
5.1.20.0070.05310.46
5.1.10.0030.05310.15
5.1.00.0030.04310.12
5.0.50.0000.0479.20
5.0.40.0000.0379.20
5.0.30.0130.0579.20
5.0.20.0030.0409.20
5.0.10.0030.0239.20
5.0.00.0100.0239.20
4.4.90.0030.0309.20
4.4.80.0030.0239.20
4.4.70.0000.0409.20
4.4.60.0030.0339.20
4.4.50.0030.0339.20
4.4.40.0070.0279.20
4.4.30.0000.0409.20
4.4.20.0030.0309.20
4.4.10.0030.0239.20
4.4.00.0030.0509.20
4.3.110.0100.0279.20
4.3.100.0030.0339.20
4.3.90.0070.0239.20
4.3.80.0030.0239.20
4.3.70.0000.0379.20
4.3.60.0030.0339.20
4.3.50.0100.0279.20
4.3.40.0000.0479.20
4.3.30.0030.0339.20
4.3.20.0030.0279.20
4.3.10.0070.0279.20
4.3.00.0070.0309.20

preferences:
37.01 ms | 401 KiB | 5 Q