__autoload自动加载类文件

<?php    function __autoload($class_name){    $class_path = $class_name . '.class.php';    if(file_exists($class_path)){    include_once($class_path);    }else{    echo '类路径出错!';    }    }    $object = new SportObject(23);    echo $object;?>

同路径下SportObject.class.php

<?phpclass SportObject{private $count;public function __construct($count){$this->count = $count;}public function __toString(){return $this->count . '';}}?>