Guidelines for building quality plugins

Up until this point, we have looked at the process of building simple plugins with the recommended practices. Most of you will be developing WordPress sites for individual clients and hence the plugins you develop will not have to go through a verification process for quality. However, it's important to build extendable and maintainable plugins that are to be compatible with WordPress version upgrades as well as other third-party plugins. On the other hand, if you are developing plugins for the WordPress plugin directory or premium plugin marketplace, you will have to go through an extensive verification and review process for both the code and features. So, the quality of the plugin needs to match ...

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