Welcome to the Plugin Developer Handbook. Whether you're writing your first plugin or your fiftieth, the best plugin possible.. The Plugin Developer Handbook covers variety of topics — everything from what should be in the header, to security best practices, to tools you can use to build your plugin. It's also in progress — please notify the in slack and we'll make it better together.. This means that you do not edit WordPress files to add functionality to your site. WordPress plugins can be depending on what you want to do. The simplest plugin is PHP file. The Hello Dolly plugin is example of such plugin. PHP file just needs Plugin Header, couple of PHP functions, and some hooks to attach your functions to.. Plugins allow you to extend the functionality of WordPress without touching WordPress core itself...
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