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<?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);
Output for git.master
string(32) "RCPHRVhSWZEMFCyw3edh3WvstGi3FZdW" string(8) "bwmeoqxz" string(64) "6Kd8kCvokgBwtBsu3U02g6XKEewa4KVWfRFyXeUDLyiPOArpOYsRiaq5U2U0Zc4z"
Output for git.master_jit
string(32) "8gZFPzml30nQ14krq6djq8Ovvg3WIdAi" string(8) "inladobu" string(64) "lt7Q2hwLB8GZIBsDwNfcG5jbao1nPjFlSgsPPVcarnWhnOPKiHID0a0IMzcFuiJJ"
Output for rfc.property-hooks
string(32) "TJhQLmPorXnRj9YHEwleFKAl2MBhhaso" string(8) "eshgblpf" string(64) "25kJdLKy2kKsxsnLPZKLkcpqkVdBVpe9kiTMMqQDhC4RwHGmAFptVy8mBfN8SKLS"

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