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(32,1,0);

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)
7.4.10.0070.01114.87
7.4.00.0000.01614.62
7.3.130.0110.00714.88
7.3.120.0040.01415.14
7.3.110.0060.01314.92
7.3.100.0000.01514.46
7.3.90.0070.00414.93
7.3.80.0090.00314.97
7.3.70.0000.01314.66
7.3.60.0070.00714.75
7.3.50.0030.01014.50
7.3.40.0030.01014.87
7.3.30.0090.00314.84
7.3.20.0040.00816.78
7.3.10.0070.00716.79
7.3.00.0040.01116.59
7.2.260.0110.00714.97
7.2.250.0060.01215.37
7.2.240.0090.00614.75
7.2.230.0070.00415.24
7.2.220.0090.00615.13
7.2.210.0000.01515.01
7.2.200.0060.00915.02
7.2.190.0070.00715.22
7.2.180.0070.00714.71
7.2.170.0000.01115.00
7.2.160.0090.00614.76
7.2.150.0040.01116.92
7.2.140.0090.00616.92
7.2.130.0040.00416.99
7.2.120.0120.00316.62
7.2.110.0090.00416.79
7.2.100.0080.00916.57
7.2.90.0100.00416.82
7.2.80.0080.01116.88
7.2.70.0080.00616.92
7.2.60.0080.00616.92
7.2.50.0110.00516.98
7.2.40.0150.00216.99
7.2.30.0100.00516.87
7.2.20.0090.00816.98
7.2.10.0070.00816.84
7.2.00.0040.00917.75
7.1.330.0140.00016.00
7.1.320.0070.00715.74
7.1.310.0030.01015.81
7.1.300.0030.00715.82
7.1.290.0110.00315.61
7.1.280.0060.00615.77
7.1.270.0000.01415.62
7.1.260.0060.00615.76
7.1.250.0070.00715.63
7.1.240.0080.00715.92
7.1.230.0100.00315.65
7.1.220.0060.00915.77
7.1.210.0100.00615.71
7.1.200.0090.00815.83
7.1.190.0070.00715.71
7.1.180.0120.00515.78
7.1.170.0090.00415.70
7.1.160.0070.00515.95
7.1.150.0050.01115.93
7.1.140.0090.00515.80
7.1.130.0070.00615.91
7.1.120.0070.00815.84
7.1.110.0050.00915.70
7.1.100.0080.01015.88
7.1.90.0120.00315.96
7.1.80.0070.01015.74
7.1.70.0030.01016.27
7.1.60.0080.00917.10
7.1.50.0080.00716.25
7.1.40.0070.00516.01
7.1.30.0080.00615.71
7.1.20.0320.00715.79
7.1.10.0070.00515.59
7.1.00.0050.03317.97
7.0.330.0070.00415.27
7.0.320.0100.00315.34
7.0.310.0100.00515.44
7.0.300.0080.00715.18
7.0.290.0090.00415.29
7.0.280.0100.00615.45
7.0.270.0100.00515.47
7.0.260.0110.00315.28
7.0.250.0070.01015.39
7.0.240.0070.00915.38
7.0.230.0090.00715.28
7.0.220.0040.01215.29
7.0.210.0070.00815.37
7.0.200.0010.01015.90
7.0.190.0110.00415.24
7.0.180.0110.00515.54
7.0.170.0070.00915.48
7.0.160.0110.00415.29
7.0.150.0050.01115.38
7.0.140.0120.02417.58
7.0.130.0130.00315.27
7.0.120.0090.00615.46
7.0.110.0080.00815.36
7.0.100.0100.00615.49
7.0.90.0100.00715.43
7.0.80.0090.00515.32
7.0.70.0070.03217.50
7.0.60.0060.03317.45
7.0.50.0060.03117.82
7.0.40.0080.02815.67
7.0.30.0070.02815.61
7.0.20.0050.03115.71
7.0.10.0070.03015.58
7.0.00.0070.03415.68
5.6.400.0030.00914.25
5.6.390.0040.01114.30
5.6.380.0040.01114.56
5.6.370.0070.00914.40
5.6.360.0110.00614.57
5.6.350.0090.00614.33
5.6.340.0080.00714.41
5.6.330.0030.01014.31
5.6.320.0060.01014.32
5.6.310.0100.00614.47
5.6.300.0100.00614.56
5.6.290.0070.00814.51
5.6.280.0030.03116.66
5.6.270.0060.00914.46
5.6.260.0100.00614.19
5.6.250.0070.00914.51
5.6.240.0110.00414.38
5.6.230.0040.00914.41
5.6.220.0050.02416.43
5.6.210.0110.02716.45
5.6.200.0070.03316.65
5.6.190.0050.03416.48
5.6.180.0090.03116.61
5.6.170.0050.03616.46
5.6.160.0110.02616.55
5.6.150.0090.03016.66
5.6.140.0070.03016.75
5.6.130.0040.03316.73
5.6.120.0040.02416.57
5.6.110.0060.01816.58
5.6.100.0090.01516.62
5.6.90.0070.01816.61
5.6.80.0080.01516.38
5.6.70.0040.02016.34
5.6.60.0030.02016.44
5.6.50.0040.01816.38
5.6.40.0060.01616.35
5.6.30.0070.01616.38
5.6.20.0050.01616.39
5.6.10.0100.01216.38
5.6.00.0050.01916.43
5.5.380.0050.00812.73
5.5.370.0020.01012.95
5.5.360.0080.02515.22
5.5.350.0070.03315.25
5.5.340.0070.03015.49
5.5.330.0060.02815.50
5.5.320.0050.02815.49
5.5.310.0020.03515.47
5.5.300.0070.01415.59
5.5.290.0070.03015.45
5.5.280.0040.02215.50
5.5.270.0060.01715.60
5.5.260.0080.01515.40
5.5.250.0050.01915.41
5.5.240.0060.01515.30
5.5.230.0040.01815.26
5.5.220.0050.01615.31
5.5.210.0080.01615.31
5.5.200.0070.01315.25
5.5.190.0040.01815.20
5.5.180.0080.01815.36
5.5.170.0080.00714.43
5.5.160.0080.01315.30
5.5.150.0060.01615.22
5.5.140.0060.01715.33
5.5.130.0050.01515.31
5.5.120.0050.01715.24
5.5.110.0070.01415.30
5.5.100.0060.01615.20
5.5.90.0060.01315.27
5.5.80.0060.01215.30
5.5.70.0040.02115.17
5.5.60.0070.01415.28
5.5.50.0060.01215.29
5.5.40.0070.02015.23
5.5.30.0080.02915.25
5.5.20.0080.02715.25
5.5.10.0080.02015.26
5.5.00.0030.03115.26
5.4.450.0050.02514.44
5.4.440.0060.01614.44
5.4.430.0080.01214.39
5.4.420.0040.01714.34
5.4.410.0060.02114.40
5.4.400.0030.01714.33
5.4.390.0050.01614.29
5.4.380.0040.01414.24
5.4.370.0030.01514.32
5.4.360.0060.01214.28
5.4.350.0080.00914.37
5.4.340.0060.01314.30
5.4.330.0040.00911.94
5.4.320.0060.01314.29
5.4.310.0030.02114.32
5.4.300.0030.01814.33
5.4.290.0050.01214.25
5.4.280.0080.01214.24
5.4.270.0060.01014.29
5.4.260.0060.01114.23
5.4.250.0090.01114.33
5.4.240.0040.01614.31
5.4.230.0040.01414.30
5.4.220.0020.01614.25
5.4.210.0040.01314.29
5.4.200.0060.02214.29
5.4.190.0060.02614.32
5.4.180.0070.02614.32
5.4.170.0090.02614.23
5.4.160.0050.02614.24
5.4.150.0040.02514.25
5.4.140.0050.02813.41
5.4.130.0060.02913.37
5.4.120.0030.02813.39
5.4.110.0060.02613.40
5.4.100.0080.02613.45
5.4.90.0060.02413.39
5.4.80.0050.02613.41
5.4.70.0080.02513.46
5.4.60.0030.02913.38
5.4.50.0060.02613.45
5.4.40.0050.02513.41
5.4.30.0050.02813.43
5.4.20.0040.02713.41
5.4.10.0050.02913.40
5.4.00.0080.01513.24
5.3.290.0060.01812.88
5.3.280.0070.01412.83
5.3.270.0040.03012.84
5.3.260.0060.02612.83
5.3.250.0040.03212.84
5.3.240.0020.02912.82
5.3.230.0060.02412.79
5.3.220.0080.02412.78
5.3.210.0030.02712.79
5.3.200.0030.02912.82
5.3.190.0080.02812.79
5.3.180.0090.02612.79
5.3.170.0020.02112.80
5.3.160.0020.02912.85
5.3.150.0020.03112.80
5.3.140.0070.02612.80
5.3.130.0030.03112.80
5.3.120.0050.02912.77
5.3.110.0030.03112.79
5.3.100.0030.02312.67
5.3.90.0070.02412.63
5.3.80.0060.02512.62
5.3.70.0060.02712.64
5.3.60.0050.02512.60
5.3.50.0020.02812.57
5.3.40.0030.02812.59
5.3.30.0090.02212.62
5.3.20.0080.02212.53
5.3.10.0010.02912.54
5.3.00.0050.02712.54
5.2.170.0030.03811.26
5.2.160.0060.02811.25
5.2.150.0030.03711.22
5.2.140.0060.03311.21
5.2.130.0070.03211.19
5.2.120.0030.02811.25
5.2.110.0030.03411.21
5.2.100.0070.02911.21
5.2.90.0060.03211.19
5.2.80.0040.02211.19
5.2.70.0020.03311.19
5.2.60.0080.03211.19
5.2.50.0080.03211.19
5.2.40.0030.03311.19
5.2.30.0060.02811.19
5.2.20.0060.03011.19
5.2.10.0020.03411.19
5.2.00.0000.02211.19
5.1.60.0040.01411.19
5.1.50.0060.01011.19
5.1.40.0040.02511.19
5.1.30.0050.02411.19
5.1.20.0040.03011.19
5.1.10.0020.02411.19
5.1.00.0060.02511.19
5.0.50.0070.02111.19
5.0.40.0050.02311.19
5.0.30.0050.03511.19
5.0.20.0040.01811.19
5.0.10.0060.02211.19
5.0.00.0050.02911.19
4.4.90.0020.02011.19
4.4.80.0050.01611.19
4.4.70.0040.01611.19
4.4.60.0050.01611.19
4.4.50.0000.02311.19
4.4.40.0030.02711.19
4.4.30.0020.01311.19
4.4.20.0040.01711.19
4.4.10.0070.01511.19
4.4.00.0020.03211.19
4.3.110.0040.01911.19
4.3.100.0060.01711.19
4.3.90.0040.01711.19
4.3.80.0030.02711.19
4.3.70.0000.02011.19
4.3.60.0060.01311.19
4.3.50.0020.02011.19
4.3.40.0000.03211.19
4.3.30.0000.01911.19
4.3.20.0020.02011.19
4.3.10.0060.01811.19
4.3.00.0040.01811.19

preferences:
39.52 ms | 400 KiB | 5 Q