每个程序头部必须有统一的注释块，规则如下：
a． 必须包含本程序的描述；
b． 必须包含作者；
c． 必须包含书写日期；
d． 必须包含版本信息；
e． 必须包含项目名称；
f． 必须包含文件的名称；
g． 重要的使用说明，如类的调用方法、注意事项等；
参考例子如下：
<?PHP // // +---------------------------------------------------------+ // | PHP version 4.0 | // +---------------------------------------------------------+ // | Copyright (c) 1997-2001 The PHP Group | // +---------------------------------------------------------+ // | This source file is subject to of the PHP license, | // | that is bundled with this packafile LICENSE, and is | // | available at through the world-web at | // | Http://www.php.net/license/2_02.txt. | // | If you did not receive a copy of the and are unable to | // | obtain it through the world-wide-web,end a note to | // | [email protected] so we can mail you a immediately. | // +---------------------------------------------------------+ // | Authors: Stig Bakken <[email protected]> | // | Tomas V.V.Cox <[email protected]> | // | | // +---------------------------------------------------------+ // // $Id: Common.php,v 1.8.2.3 2001/11/13 01:26:48 ssb Exp $