Generating a pseudo random code

[robrobrob]

I have a function in my class (derived from this function) to generate a secure code and then a test function to update the database and print the code out onto the page. The generator function works fine on a page where it is just functionally programmed and immediately called, but once I put it into my class in CodeIgniter, it doesn't work.Here is my generator function:\[code\]private function createSecureCode(){ // Get 128 pseudorandom bits in a string of 16 bytes $pr_bits = ''; $fp = @fopen('/dev/urandom','rb'); if ($fp !== false) { $pr_bits .= @fread($fp,16); @fclose($fp); } return $pr_bits;}\[/code\]Here is my test function:\[code\]public function test(){$query = $this->db->get("clients");$result = ""; foreach($query->result() as $results) { $code = $this->createSecureCode(); $result .= $code." - "; $this->db->where("client_id", $results->client_id); $this->db->update("clients", array("client_secure_code" => $code, "client_active" => 1)); } /*$query = $this->db->get("clients"); $row = $query->first_row(); print($row->client_secure_code." - ");*/ print($result); return $result;}\[/code\]