扩展MySQLi类 [英] Extending the MySQLi class

问题描述

我想要能够扩展MySQLi类的类来执行所有的SQL查询。

I want to be able to make classes which extend the MySQLi class to perform all its SQL queries.

$mysql = new mysqli('localhost', 'root', 'password', 'database') or die('error connecting to the database');

我不知道如何做这个没有全球化$ mysql对象使用在我的其他方法或类

I dont know how to do this without globalising the $mysql object to use in my other methods or classes.

class Blog {

public function comment() {
    global $mysql;

    //rest here
}

}

任何帮助将不胜感激。

谢谢。

推荐答案

我的建议是创建一个Singleton DataAccess类，在全局配置文件中实例化该类，并在您的Blog类中调用它 $ query = DataAccess :: query（SELECT * FROM blog WHERE id =。$ id）。

My suggestion is to create a Singleton DataAccess class, instantiate that class in a global config file and call it in your Blog class like $query = DataAccess::query("SELECT * FROM blog WHERE id = ".$id).

看看Singleton模式，这是一个很容易理解的designpattern。非常适合这种情况。

Look into the Singleton pattern, it's a pretty easy to understand designpattern. Perfect for this situation.

您的DataAccess类可以有几个方法，例如 query ， fetchAssoc ， numRows ， checkUniqueValue ， transactionStart ， transactionCommit ， transactionRollback 等等。这些函数也可以被设置为由DataAccess实现的接口类。这样，您可以轻松地为多个数据库管理系统扩展DataAccess类。

Your DataAccess class can have several methods like query, fetchAssoc, numRows, checkUniqueValue, transactionStart, transactionCommit, transactionRollback etc etc. Those function could also be setup as an Interface which gets implemented by the DataAccess class. That way you can easily extend your DataAccess class for multiple database management systems.

上面几乎描述了我的DataAccess模型。

The above pretty much describes my DataAccess model.

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