3v4l.org

run code in 300+ PHP versions simultaneously
<?php /** * Generate a random string, using a cryptographically secure * pseudorandom number generator (random_int) * * For PHP 7, random_int is a PHP core function * For PHP 5.x, depends on https://github.com/paragonie/random_compat * * @param int $length How many characters do we want? * @param string $keyspace A string of all possible characters * to select from * @return string */ function random_str( int $length = 64, string $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' ): string { if ($length < 1) { throw new \RangeException("Length must be a positive integer"); } $pieces = []; $max = mb_strlen($keyspace, '8bit') - 1; for ($i = 0; $i < $length; ++$i) { $pieces []= $keyspace[random_int(0, $max)]; } return implode('', $pieces); } $a = random_str(32); $b = random_str(8, 'abcdefghijklmnopqrstuvwxyz'); $c = random_str(); var_dump($a, $b, $c);

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)
8.3.100.0280.00737.54
8.3.90.0170.00823.71
8.3.80.0170.00520.05
8.3.70.0280.00819.97
8.3.60.0240.01126.20
8.3.50.0360.00426.77
8.3.40.0270.01526.77
8.3.30.0210.00726.77
8.3.20.0240.00626.77
8.3.10.0130.00926.77
8.3.00.0180.00426.77
8.2.210.0130.00926.77
8.2.200.0180.00326.77
8.2.190.0160.00626.77
8.2.180.0160.00326.77
8.2.170.0120.01021.49
8.2.160.0200.00824.23
8.2.150.0160.00721.22
8.2.140.0130.00725.36
8.2.130.0120.00727.94
8.2.120.0170.00826.77
8.2.110.0130.00721.81
8.2.100.0180.00419.76
8.2.90.0230.00326.77
8.2.80.0130.01026.77
8.2.70.0080.00466.80
8.2.60.0150.00635.46
8.2.50.0110.00726.82
8.2.40.0120.00425.53
8.2.30.0100.00423.01
8.2.20.0080.00524.11
8.2.10.0070.00620.23
8.2.00.0090.00622.05
8.1.290.0200.00026.77
8.1.280.0160.00826.77
8.1.270.0300.00326.77
8.1.260.0440.00326.77
8.1.250.0180.00426.77
8.1.240.0140.01320.49
8.1.230.0240.00026.77
8.1.220.0180.00221.01
8.1.210.0120.00826.77
8.1.200.0130.00729.96
8.1.190.0140.00235.82
8.1.180.0140.00228.80
8.1.170.0120.00427.42
8.1.160.0150.00426.18
8.1.150.0120.00726.13
8.1.140.0080.00421.17
8.1.130.0120.00622.36
8.1.120.0110.00521.47
8.1.110.0100.00620.76
8.1.100.0100.00619.89
8.1.90.0110.00419.90
8.1.80.0110.00519.84
8.1.70.0080.00518.81
8.1.60.0110.00519.18
8.1.50.0120.00619.28
8.1.40.0120.00519.31
8.1.30.0130.00519.16
8.1.20.0130.00518.89
8.1.10.0130.00518.66
8.1.00.0150.00518.86
8.0.300.0250.00529.48
8.0.290.0150.00435.67
8.0.280.0120.00426.25
8.0.270.0110.00623.84
8.0.260.0120.00522.22
8.0.250.0120.00421.04
8.0.240.0110.00420.69
8.0.230.0080.00719.66
8.0.220.0110.00519.70
8.0.210.0100.00519.39
8.0.200.0100.00519.22
8.0.190.0100.00519.03
8.0.180.0110.00518.85
8.0.170.0100.00618.86
8.0.160.0110.00518.44
8.0.150.0120.00518.30
8.0.140.0120.00518.15
8.0.130.0120.00518.20
8.0.120.0110.00517.24
8.0.110.0110.00517.90
8.0.100.0110.00517.87
8.0.90.0100.00517.83
8.0.80.0110.00617.66
8.0.70.0100.00617.74
8.0.60.0100.00617.77
8.0.50.0100.00517.78
8.0.30.0110.00617.47
8.0.20.0120.00617.55
8.0.10.0110.00717.52
8.0.00.0100.00617.52
7.4.330.0100.00420.23
7.4.320.0140.00320.06
7.4.300.0100.00418.54
7.4.290.0100.00418.17
7.4.280.0100.00517.83
7.4.270.0100.00517.59
7.4.260.0120.00517.77
7.4.250.0110.00517.31
7.4.240.0100.00517.58
7.4.230.0100.00517.52
7.4.220.0090.00417.43
7.4.210.0090.00517.42
7.4.200.0090.00517.45
7.4.190.0090.00517.55
7.4.180.0090.00617.54
7.4.160.0100.00617.27
7.4.150.0100.00617.18
7.4.140.0100.00617.19
7.4.130.0100.00717.13
7.4.120.0110.00717.12
7.4.110.0110.00717.02
7.4.100.0100.00717.06
7.4.90.0100.00717.00
7.4.80.0110.00716.95
7.4.70.0100.00716.94
7.4.60.0110.00716.91
7.4.50.0100.00816.80
7.4.40.0110.00716.79
7.4.30.0100.00716.82
7.4.20.0100.00716.77
7.4.10.0100.00716.75
7.4.00.0090.00716.74
7.3.330.0120.00417.58
7.3.320.0120.00517.46
7.3.310.0120.00517.55
7.3.300.0120.00417.47
7.3.290.0100.00517.16
7.3.280.0110.00617.17
7.3.270.0110.00616.98
7.3.260.0120.00616.98
7.3.250.0110.00616.94
7.3.240.0120.00716.93
7.3.230.0110.00716.89
7.3.220.0120.00716.85
7.3.210.0110.00716.85
7.3.200.0120.00716.81
7.3.190.0110.00716.80
7.3.180.0110.00716.79
7.3.170.0120.00716.76
7.3.160.0110.00716.77
7.3.150.0110.00716.74
7.3.140.0120.00716.73
7.3.130.0110.00716.70
7.3.120.0110.00716.58
7.3.110.0110.00816.51
7.3.100.0110.00716.33
7.3.90.0110.00816.38
7.3.80.0120.00716.27
7.3.70.0110.00716.29
7.3.60.0100.00816.32
7.3.50.0110.00716.30
7.3.40.0110.00716.31
7.3.30.0100.00816.30
7.3.20.0130.00816.78
7.3.10.0130.00716.74
7.3.00.0130.00816.74
7.2.340.0160.00716.99
7.2.330.0150.00716.92
7.2.320.0160.00716.92
7.2.310.0150.00716.85
7.2.300.0140.00816.88
7.2.290.0140.00816.84
7.2.280.0140.00816.83
7.2.270.0140.00816.80
7.2.260.0140.00816.78
7.2.250.0130.00816.75
7.2.240.0130.00816.66
7.2.230.0130.00816.53
7.2.220.0130.00816.43
7.2.210.0130.00816.40
7.2.200.0130.00816.46
7.2.190.0130.00816.42
7.2.180.0130.00816.42
7.2.170.0120.00816.45
7.2.160.0120.00816.44
7.2.150.0140.00916.95
7.2.140.0140.00816.94
7.2.130.0140.00817.02
7.2.120.0140.00816.97
7.2.110.0140.00816.97
7.2.100.0150.00816.97
7.2.90.0150.00816.94
7.2.80.0140.00816.95
7.2.70.0140.00916.95
7.2.60.0140.00816.95
7.2.50.0150.00816.96
7.2.40.0150.00816.98
7.2.30.0140.00816.99
7.2.20.0150.00916.96
7.2.10.0150.00816.97
7.2.00.0150.00816.99
7.1.330.0170.00816.29
7.1.320.0160.00816.04
7.1.310.0160.00816.02
7.1.300.0160.00815.97
7.1.290.0160.00815.97
7.1.280.0170.00815.98
7.1.270.0150.00715.97
7.1.260.0150.00815.96
7.1.250.0160.00815.94
7.1.240.0180.00816.40
7.1.230.0180.00716.41
7.1.220.0160.00716.43
7.1.210.0170.00716.42
7.1.200.0160.00716.42
7.1.190.0160.00816.43
7.1.180.0170.00716.38
7.1.170.0170.00716.38
7.1.160.0170.00716.38
7.1.150.0170.00816.37
7.1.140.0170.00816.40
7.1.130.0170.00716.38
7.1.120.0180.00816.37
7.1.110.0170.00716.50
7.1.100.0160.00716.41
7.1.90.0170.00716.40
7.1.80.0160.00816.43
7.1.70.0170.00716.32
7.1.60.0160.00716.43
7.1.50.0160.00816.43
7.1.40.0170.00716.44
7.1.30.0170.00716.44
7.1.20.0160.00816.42
7.1.10.0160.00816.41
7.1.00.0170.00716.40
5.2.90.0080.00926.77

preferences:
51.66 ms | 403 KiB | 5 Q