[PHP] 自动加载的实现详解编程语言

<?php 
use Api/User; 
use Service/User as User2; 
class Application{ 
    public static function main(){ 
        self::registe(); 
        new User(); 
        new User2(); 
    } 
    public static function registe(){ 
        spl_autoload_register("Application::loadClass"); 
    } 
    public static function loadClass($class){ 
        $class=str_replace('//', '/', $class); 
        $class="./".$class.".php"; 
        require_once $class;         
    } 
} 
Application::main();

<?php 
namespace Api; 
 
use Service/Login; 
class User{ 
    public function __construct(){ 
        echo "User类<br/>"; 
        new Login(); 
        new Account(); 
    } 
}

<?php 
namespace Api; 
 
class Account{ 
    public function __construct(){ 
        echo "Account类<br/>"; 
    } 
}

<?php 
namespace Service; 
 
class Login{ 
    public function __construct(){ 
        echo "Login类<br/>"; 
    } 
}

<?php 
namespace Service; 
 
class User{ 
    public function __construct(){ 
        echo "Service下的User类<br/>"; 
    } 
}