3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!defined('PHP_EOL')) { define('PHP_EOL', "\r\n"); } // generate the 32bit byte array (if you have the "openssl_random_pseudo_bytes" function available) if (function_exists('openssl_random_pseudo_bytes')) { $random_key = openssl_random_pseudo_bytes(32); } else { // this is the longer way to do it... $random_key = ''; for( $i = 0; $i < 64; $i++) { $random_key .= chr(mt_rand(65, 90)); } $random_key = hexdec($random_key); } // this is it as hex print "Hex key: " . bin2hex($random_key) . PHP_EOL; print PHP_EOL; // this is the base64 string that you want to save print "Save this string: " . base64_encode($random_key) . PHP_EOL;

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)
7.3.10.0070.00716.67
7.3.00.0100.00616.41
7.2.130.0080.00416.85
7.2.120.0040.00816.95
7.2.110.0000.01817.01
7.2.100.0110.00617.05
7.2.90.0070.01016.70
7.2.80.0030.01017.04
7.2.70.0030.01016.79
7.2.60.0040.00817.05
7.2.50.0040.00817.04
7.2.40.0040.00717.01
7.2.30.0040.01117.04
7.2.20.0030.01016.73
7.2.10.0030.00616.96
7.2.00.0040.00718.16
7.1.250.0040.01115.74
7.1.70.0000.01016.89
7.1.60.0090.01519.40
7.1.50.0030.01417.00
7.1.00.0030.07322.28
7.0.200.0030.00716.82
7.0.140.0100.06322.08
7.0.100.0030.06719.95
7.0.90.0070.06019.99
7.0.80.0230.05019.92
7.0.70.0170.06320.02
7.0.60.0170.06720.15
7.0.50.0070.08020.34
7.0.40.0070.05720.07
7.0.30.0100.05020.03
7.0.20.0000.08320.12
7.0.10.0000.06720.10
7.0.00.0030.08320.12
5.6.280.0100.06720.76
5.6.250.0170.04720.71
5.6.240.0100.05320.57
5.6.230.0070.08020.54
5.6.220.0070.06320.65
5.6.210.0130.04020.66
5.6.200.0000.05321.00
5.6.190.0030.05721.10
5.6.180.0130.07721.00
5.6.170.0030.07721.05
5.6.160.0100.08021.08
5.6.150.0100.06721.04
5.6.140.0170.07720.96
5.6.130.0100.07721.03
5.6.120.0100.07320.99
5.6.110.0030.08721.02
5.6.100.0070.05321.18
5.6.90.0170.06721.03
5.6.80.0070.05720.49
5.6.70.0170.07020.54
5.6.60.0170.07020.45
5.6.50.0130.05320.42
5.6.40.0100.08320.43
5.6.30.0030.06320.37
5.6.20.0130.07020.56
5.6.10.0070.08320.46
5.6.00.0100.07720.44
5.5.380.0100.08720.54
5.5.370.0070.05020.34
5.5.360.0030.05020.56
5.5.350.0100.05020.40
5.5.340.0170.06020.64
5.5.330.0070.04720.77
5.5.320.0030.07320.89
5.5.310.0130.06020.79
5.5.300.0100.03720.89
5.5.290.0030.08720.79
5.5.280.0100.08320.86
5.5.270.0030.05020.88
5.5.260.0100.06020.78
5.5.250.0100.06020.76
5.5.240.0030.04720.29
5.5.230.0130.05020.25
5.5.220.0100.07320.14
5.5.210.0130.08020.27
5.5.200.0170.07020.16
5.5.190.0100.07020.11
5.5.180.0030.06320.16
5.5.160.0100.07320.27
5.5.150.0000.04720.14
5.5.140.0070.05020.25
5.5.130.0030.05320.20
5.5.120.0070.08319.99
5.5.110.0130.07319.97
5.5.100.0030.07720.11
5.5.90.0100.07319.94
5.5.80.0000.05020.14
5.5.70.0070.08320.08
5.5.60.0100.05020.08
5.5.50.0130.04020.09
5.5.40.0100.07720.09
5.5.30.0070.04020.08
5.5.20.0000.04720.17
5.5.10.0000.04320.04
5.5.00.0070.08020.04
5.4.450.0030.04719.17
5.4.440.0030.05019.36
5.4.430.0000.08019.34
5.4.420.0030.06719.57
5.4.410.0170.06719.29
5.4.400.0100.06319.04
5.4.390.0100.04018.85
5.4.380.0100.06318.85
5.4.370.0130.07019.07
5.4.360.0100.06019.06
5.4.350.0070.08019.20
5.4.340.0030.07319.18
5.4.320.0030.06318.88
5.4.310.0100.06319.07
5.4.300.0030.04019.09
5.4.290.0070.08018.85
5.4.280.0000.08019.17
5.4.270.0130.07319.18
5.4.260.0070.05318.94
5.4.250.0030.06019.15
5.4.240.0170.03019.21
5.4.230.0030.08019.11
5.4.220.0070.06718.94
5.4.210.0130.07019.08
5.4.200.0130.03318.87
5.4.190.0070.04019.11
5.4.180.0030.06318.93
5.4.170.0100.08019.08
5.4.160.0070.05019.02
5.4.150.0070.04019.06
5.4.140.0000.05316.30
5.4.130.0130.06716.22
5.4.120.0030.07016.21
5.4.110.0100.07016.21
5.4.100.0100.06316.36
5.4.90.0030.08016.31
5.4.80.0130.04016.42
5.4.70.0070.03316.21
5.4.60.0000.07716.29
5.4.50.0000.07716.31
5.4.40.0070.07316.41
5.4.30.0100.06716.31
5.4.20.0070.07016.37
5.4.10.0030.07716.29
5.4.00.0100.03315.67
5.3.290.0030.04314.64
5.3.280.0070.05714.55
5.3.270.0030.07314.44
5.3.260.0030.08014.55
5.3.250.0030.04714.59
5.3.240.0100.06714.47
5.3.230.0070.07014.60
5.3.220.0000.04314.50
5.3.210.0130.05014.43
5.3.200.0100.06014.40
5.3.190.0030.07314.55
5.3.180.0100.06714.50
5.3.170.0030.05714.42
5.3.160.0100.07014.39
5.3.150.0070.07014.52
5.3.140.0030.06714.54
5.3.130.0100.05314.50
5.3.120.0070.07314.41
5.3.110.0170.06014.52
5.3.100.0030.07714.00
5.3.90.0070.06014.00
5.3.80.0030.08313.87
5.3.70.0100.05713.83
5.3.60.0130.07013.99
5.3.50.0000.08013.93
5.3.40.0030.05713.90
5.3.30.0130.05313.84
5.3.20.0030.07313.46
5.3.10.0030.07013.64
5.3.00.0130.07013.58
5.2.170.0070.05311.13
5.2.160.0070.06010.98
5.2.150.0070.05311.14
5.2.140.0000.06710.93
5.2.130.0070.05711.02
5.2.120.0100.05711.09
5.2.110.0070.05711.05
5.2.100.0070.06011.08
5.2.90.0070.06011.14
5.2.80.0070.05311.09
5.2.70.0070.06010.98
5.2.60.0000.06010.93
5.2.50.0000.07011.03
5.2.40.0070.06011.00
5.2.30.0070.03310.83
5.2.20.0030.05710.82
5.2.10.0070.06010.78
5.2.00.0100.06010.80
5.1.60.0070.05010.10
5.1.50.0070.05310.07
5.1.40.0070.05010.05
5.1.30.0030.05310.36
5.1.20.0030.02710.37
5.1.10.0070.03710.13
5.1.00.0030.0479.89
5.0.50.0030.0438.94
5.0.40.0030.0438.94
5.0.30.0070.0638.94
5.0.20.0030.0438.94
5.0.10.0030.0438.94
5.0.00.0070.0608.94
4.4.90.0000.0408.94
4.4.80.0000.0338.94
4.4.70.0000.0378.94
4.4.60.0000.0338.94
4.4.50.0200.0108.94
4.4.40.0000.0278.94
4.4.30.0000.0208.94
4.4.20.0000.0338.94
4.4.10.0000.0408.94
4.4.00.0000.0278.94
4.3.110.0030.0178.94
4.3.100.0000.0238.94
4.3.90.0070.0278.94
4.3.80.0070.0538.94
4.3.70.0030.0178.94
4.3.60.0000.0178.94
4.3.50.0000.0438.94
4.3.40.0070.0538.94
4.3.30.0070.0208.94
4.3.20.0000.0408.94
4.3.10.0030.0338.94
4.3.00.0070.0308.94

preferences:
35.06 ms | 401 KiB | 5 Q