case 'array_string':
			if (is_array($replacement))
			{
				if (empty($replacement))
					smf_db_error_backtrace('Database error, given array of string values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
 
				foreach ($replacement as $key => $value)
					$replacement[$key] = sprintf('\'%1$s\'', mysql_real_escape_string($value, $connection));
 
				return implode(', ', $replacement);
			}
			else
				smf_db_error_backtrace('Wrong value type sent to the database. Array of strings expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
		break;