@ 2015-07-24T16:48:54Z <?php
function shitty_prng($bytes = 32)
{
$buf = '';
for ($i = 0; $i < $bytes; ++$i) {
$buf .= chr(mt_rand(0, 255));
}
}
function better_prng($bytes = 32)
{
return random_bytes($bytes);
}
function openssl_prng($bytes = 32)
{
return openssl_random_pseudo_bytes($bytes);
}
function mcrypt_prng($bytes = 32)
{
return mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM);
}
$buf = '';
$tests = [];
$start = microtime(true);
for ($i = 0; $i < 100000; ++$i) {
$buf = shitty_prng();
}
$tests['mtrand'] = ( microtime(true) - $start );
$start = microtime(true);
for ($i = 0; $i < 100000; ++$i) {
$buf = better_prng();
}
$tests['csprng'] = ( microtime(true) - $start );
$start = microtime(true);
for ($i = 0; $i < 100000; ++$i) {
$buf = openssl_prng();
}
$tests['openssl'] = ( microtime(true) - $start );
$start = microtime(true);
for ($i = 0; $i < 100000; ++$i) {
$buf = mcrypt_prng();
}
$tests['mcrypt'] = ( microtime(true) - $start );
var_dump($tests);
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Output for 7.0.0 - 7.0.33 , 7.1.0 - 7.1.25 , 7.2.0 - 7.2.13 , 7.3.0 - 7.3.1 Fatal error: Uncaught Error: Call to undefined function openssl_random_pseudo_bytes() in /in/j330O:16
Stack trace:
#0 /in/j330O(39): openssl_prng()
#1 {main}
thrown in /in/j330O on line 16
Process exited with code 255 . Output for 5.4.0 - 5.4.45 , 5.5.0 - 5.5.38 , 5.6.0 - 5.6.38 Fatal error: Call to undefined function random_bytes() in /in/j330O on line 11
Process exited with code 255 . Output for 4.4.2 - 4.4.9 , 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 , 5.3.0 - 5.3.29 Parse error: syntax error, unexpected '[' in /in/j330O on line 26
Process exited with code 255 . Output for 4.3.0 - 4.3.1 , 4.3.5 - 4.3.11 , 4.4.0 - 4.4.1 , 5.0.0 - 5.0.5 Parse error: parse error, unexpected '[' in /in/j330O on line 26
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error in /in/j330O on line 26
Process exited with code 255 . preferences:dark mode live preview
196.35 ms | 401 KiB | 288 Q