/**
* Returns a random string with alpha-numeric characters.
*
* @param integer $count Number of characters to generate
* @param string $characters Allowed characters, defaults to alpha-numeric (a-zA-Z0-9)
* @return string A random string
*/
public static function generateRandomString($count, $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
{
return \Security_Randomizer::getRandomString($count, $characters);
}
/**
* A private method for calculating frequencies.
*
* @return void
*/
private static function entropyFrequencies()
{
$tokenFreqs = array();
for ($i = 0; $i < self::$entropyNumEvents; $i++) {
$tmp = ord(self::entropyDataPosition($i));
if (isset($tokenFreqs[$tmp])) {
$tokenFreqs[$tmp]++;
} else {
$tokenFreqs[$tmp] = 1;
}
}
self::$entropyTokenFreqs = $tokenFreqs;
}
