插件主PHP文件的顶部必须包含standard Plugin information header. 此标题允许WordPress识别您的插件存在，将其添加到插件管理屏幕，以便激活、加载和运行其功能；如果没有标题，插件将永远不会被激活，也永远不会运行。标题格式如下：

<?php
/**
 * Plugin Name: Name Of The Plugin
 * Plugin URI: http://URI_Of_Page_Describing_Plugin_and_Updates
 * Description: A brief description of the Plugin.
 * Version: The Plugin\'s Version Number, e.g.: 1.0
 * Author: Name Of The Plugin Author
 * Author URI: http://URI_Of_The_Plugin_Author

插件头损坏时会出现此错误。Plugin Name: xxx 不应该是文件的第一行，而应该是前几行：

<?php
/*
Plugin Name: xxx

... more text here ...

*/

... plugin code here ...

如果您是从CodeCanyon或类似软件下载的，请先解压缩下载包，然后上载真正的插件zip。通常，包含的许可证、文档和源文件不是可安装文件的一部分。

插件头信息文件必须位于插件根目录下，包含有效的头信息，如：

<?php
/**
 * Plugin Name: Name Of The Plugin
 * Plugin URI: http://URI_Of_Page_Describing_Plugin_and_Updates
 * Description: A brief description of the Plugin.
 * Version: The Plugin\'s Version Number, e.g.: 1.0
 * Author: Name Of The Plugin Author
 * Author URI: http://URI_Of_The_Plugin_Author

步骤1：

COPY FOLDER TO YOUR WP PLUGINS DIRECTORY. AND SEE IF YOU CAN ACTIVATE.IF YES, 

RE-ZIP WITH FEW FACTS IN MIND, TRY TO ZIP MAIN FOLDER.WHERE MAIN FOLDER IS A FOLDER WHICH HAS GOT MAIN FILE AND OTHER STUFFS IN IT.

RENAME FOLDER TO SINGLE WORD. LIKE rat_catcher instead rat catcher.
UNZIP OLD FOLDER AND CHECKOUT YOUR FILE STRUCTURE. U MIGHT HAVE MISPLACED MAIN FILE