PHP之自动加载

<span><span>function</span><span>__autoload</span><span>(<span>$name</span>)</span>{</span><span>require</span><span>'./lib/'</span>.<span>$name</span>.<span>'.class.php'</span>;
}

<span>//注册用于自动加载的函数</span>
spl_autoload_register(<span>"model"</span>);
spl_autoload_register(<span>"controll"</span>);
<span>//分别定义两个函数</span><span><span>function</span><span>model</span><span>(<span>$name</span>)</span>{</span><span>$file</span> = <span>'./model/'</span>.<span>$name</span>.<span>'.class.php'</span>;
    <span>if</span>(file_exists(<span>$file</span>)){
        <span>require</span><span>'./model/'</span>.<span>$name</span>.<span>'.class.php'</span>;
    }
}
<span>//如果需要一个类，但当前页面还没加载该类</span><span>//就会依次调用model（）和controll（），直到找到该类文件加载，否则就报错</span><span><span>function</span><span>controll</span><span>(<span>$name</span>)</span>{</span><span>$file</span> = <span>'./controll/'</span>.<span>$name</span>.<span>'.class.php'</span>;
    <span>if</span>(file_exists(<span>$file</span>)){
        <span>require</span><span>'./controll/'</span>.<span>$name</span>.<span>'.class.php'</span>;
    }
}