大多数WordPress插件是在GPL下发布的，这与WordPress本身使用的许可相同。但是，还有其他兼容选项可用。最好明确指出插件使用的许可证。
在页头要求一节中，我们简要介绍了如何表明您的插件页头注释中的插件许可证。另一种常见且受鼓励的做法是在主插件文件（与插件页头注释相同）顶部附近放置许可证注释块。
此许可证注释块通常如下所示：
/*
{Plugin Name} is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
any later version.
{Plugin Name} is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with {Plugin Name}. If not, see {URI to Plugin License}.
*/