php 类文件加载 Autoloader

<?php

use model\BookModel;

include_once __DIR__.‘/autoloader.php‘;
Autoloader::register();

$book=new BookModel();
$book->id=10;
$book->name="wangk";
echo $book->toString();

?>

<?php

/**
 *
 * 自动载入函数
 */
class Autoloader
{
    /**
     * 向PHP注册在自动载入函数
     */
    public static function register()
    {
        spl_autoload_register(array(new self, ‘autoload‘));
    }

    /**
     * 根据类名载入所在文件
     */
    public static function autoload($className)
    {

        // DIRECTORY_SEPARATOR：目录分隔符，linux上就是’/’    windows上是’\’
        $filePath = __DIR__ . DIRECTORY_SEPARATOR . $className;
        $filePath = str_replace(‘\\‘, DIRECTORY_SEPARATOR, $filePath) . ‘.php‘;
        if (file_exists($filePath)) {
            require_once $filePath;
            return;
//                if(method_exists($className, "init")) {
//                    call_user_func(array($className, "init"), $params);
//                }
        } else {
            echo "无法加载" . $filePath;
        }

    }
}

<?php
/**
 * Created by PhpStorm.
 * User: wangk
 * Date: 2015/7/16
 * Time: 10:14
 */

namespace model;


class BookModel {

     public  $name;
     public  $id;
     public  $age;

    public  function  toString(){

        return ‘name:‘.$this->name.‘,‘.$this->id.",".$this->age;
    }

}