基于psr的规范,使用命名空间和spl_autoload_register()来实现自动加载
文件结构:
|--Api
|--Account.php
|--User.php
|--Service
|--Login.php
|--User.php
|--Application.php
Application.php
<span style="color: #000000;">php </span><span style="color: #0000ff;">use</span><span style="color: #000000;"> Api\User; </span><span style="color: #0000ff;">use</span> Service\User <span style="color: #0000ff;">as</span><span style="color: #000000;"> User2; </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> Application{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> main(){ self</span>::<span style="color: #000000;">registe(); </span><span style="color: #0000ff;">new</span><span style="color: #000000;"> User(); </span><span style="color: #0000ff;">new</span><span style="color: #000000;"> User2(); } </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> registe(){ spl_autoload_register(</span>"Application::loadClass"<span style="color: #000000;">); } </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> loadClass(<span style="color: #800080;">$class</span><span style="color: #000000;">){ </span><span style="color: #800080;">$class</span>=<span style="color: #008080;">str_replace</span>('\\', '/', <span style="color: #800080;">$class</span><span style="color: #000000;">); </span><span style="color: #800080;">$class</span>="./".<span style="color: #800080;">$class</span>.".php"<span style="color: #000000;">; </span><span style="color: #0000ff;">require_once</span> <span style="color: #800080;">$class</span><span style="color: #000000;">; } } Application</span>::main();
Api\User.php
<span style="color: #000000;">php namespace Api; </span><span style="color: #0000ff;">use</span><span style="color: #000000;"> Service\Login; </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> User{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> __construct(){ </span><span style="color: #0000ff;">echo</span> "User类<br>"<span style="color: #000000;">; </span><span style="color: #0000ff;">new</span><span style="color: #000000;"> Login(); </span><span style="color: #0000ff;">new</span><span style="color: #000000;"> Account(); } }</span>
Api\Account.php
<span style="color: #000000;">php namespace Api; </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> Account{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> __construct(){ </span><span style="color: #0000ff;">echo</span> "Account类<br>"<span style="color: #000000;">; } }</span>
Service\Login.php
<span style="color: #000000;">php namespace Service; </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> Login{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> __construct(){ </span><span style="color: #0000ff;">echo</span> "Login类<br>"<span style="color: #000000;">; } }</span>
Service\User.php
<span style="color: #000000;">php namespace Service; </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> User{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> __construct(){ </span><span style="color: #0000ff;">echo</span> "Service下的User类<br>"<span style="color: #000000;">; } }</span>
结果:

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