The PHPDoc result type for the Zend_Db_Adapter_Abstract::fetchOne() method is wrong

dmitry_fedyuk · March 1, 2016, 5:49pm

zendframework/zf1/blob/release-1.12.16/library/Zend/Db/Adapter/Abstract.php#L819-L831


/**
 * Fetches the first column of the first row of the SQL result.
 *
 * @param string|Zend_Db_Select $sql An SQL SELECT statement.
 * @param mixed $bind Data to bind into SELECT placeholders.
 * @return string
 */
public function fetchOne($sql, $bind = array())
{
    $stmt = $this->query($sql, $bind);
    $result = $stmt->fetchColumn(0);
    return $result;
}

The method can return not only a string, but false too: