Phactory\Sql\DbUtil\MysqlUtil::getPrimaryKey PHP Method

    public function getPrimaryKey($table)
    {
        $table = $this->quoteIdentifier($table);
        $stmt = $this->_pdo->query("SHOW KEYS FROM {$table} WHERE Key_name = 'PRIMARY'");
        $result = $stmt->fetch();
        return $result['Column_name'];
    }