php自动加载类

1. 自动加载类:AutoLoadController.php

    <?php
   
    class AutoLoadController
    {
        private $base_dir;
   
        public function __construct() {
            $this->base_dir = __DIR__;
            spl_autoload_register(array($this,'autoLoad'));
        }
   
        public function autoLoad($classname){
            $file_path = $this->base_dir . DIRECTORY_SEPARATOR . $classname .".php";
            if(file_exists($file_path)){
                include_once($file_path);
            }
        }
    }
   

2. 调用自动加载类:index.php

    <?php
   
    require_once ('AutoLoadController.php');
   
    new AutoLoadController();
   
    $opt = getopt("c::a::",array());
    $controller = $opt['c']?$opt['c']:'defaultClass';
    $action     = $opt['a']?$opt['a']:'defaultAction';
    $obj = new $controller();
    $obj->$action();
   

3. 类文件1:Class1.php

    <?php
    class Class1{
        public function action1(){
            echo "I'm Class1->action1";
        }
        public function action2(){
            echo "I'm Class1->action2";
        }
        public function defaultAction(){
            echo "I'm Class1->defaultAction";
        }
    }
   

4. 类文件2:Class2.php

    <?php
   
    class Class2{
        public function action1(){
            echo "I'm Class2->action1";
        }
        public function action2(){
            echo "I'm Class2->action2";
        }
        public function defaultAction(){
            echo "I'm Class2->defaultAction";
        }
    }
   

5. 类文件3:defaultClass.php

    <?php
   
    class defaultClass{
        public function action1(){
            echo "I'm defaultClass->action1";
        }
        public function action2(){
            echo "I'm defaultClass->action2";
        }
        public function defaultAction(){
            echo "I'm defaultClass->defaultAction";
        }
    }