Create 6 char uniquie ID

gistfile1.aw

private function generateUniqueID()
{
// creates a unique 6 position alphanumeric client id
// if the client id is already in the clients table then call this function again
// otherwise return the client id
//
   $newCode = strtoupper(substr(md5(uniqid(rand(), true)),0,6));  // creates a 6 digit token

	if($this->job_model->isIDinUse($newCode)){
	    // that code exists already so try again
	    $this->generateUniqueID();
	}else{
	    return $newCode;
	}
}	

function isIDinUse($newID)
{
	$this->db->where('jobid', $newID);
	$this->db->limit(1);
	$query = $this->db->get('jobs');
	$count = $query->num_rows();
		
	if($count > 1)
	{
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}