The principle of PHP class automatic loading and PHP chain operation

小云云
Release: 2023-03-19 20:56:02
Original
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本文主要和大家分享php类自动装载和php链式操作的原理,希望能帮助到大家。

1、自动装载实例

目录下有3个文件:index.php load.php tests文件夹

tests文件夹里有 test1.php


'; echo __FILE__.'
'; } }
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index.php内容



        
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load.php内容



        
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2.链式操作原理

在一个类中有多个方法,当你实例化这个类,并调用方法时只能一个一个调用,类似:

db.php


        
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index.php

where(); $db->order(); $db->limit();
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如果要实现链式调用,这要在方法的结束添加return $this即可。

db.php


        
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index.php

where()->order()->limit();
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