In WordPress, filters enable developers to intercept and modify data as a WordPress page is loading, before sending it to the browser or saving it to the database. For these reasons, this filter cheat sheet is ideal for those new to working with filters. This cheat sheet provides an in-depth understanding of what filters do and how they work, and provides a quick reference guide for using filters in WordPress development. A WordPress page is made up of a whole bunch of functions and database queries, with the WordPress core code and the theme working together to output text, images, stylesheets, and other resources. Basically, filters let you manipulate data coming out of the database before going to the browser, or coming from the browser before going into the database.
Using Filters: Example
WordPress offers filter hooks to allow plugins to modify various types of internal data at runtime. A plugin can modify data by binding a callback to a filter hook. When the filter is later applied, each bound callback is run in order of priority, and given the opportunity to modify a value by returning a new value. If no arguments were accepted by the callback that is considered to be the same as accepting 1 argument. For example:. It is up to you to take care. This is done for optimization purposes, so everything is as quick as possible.
Work fast with our official CLI. Learn more. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. There was a problem preparing your codespace, please try again. Sometimes developers need to filter the output of a widget that does not have its own output filter built-in. This plugin provides a filter which will allow developers to filter any widget's output, regardless of whether it has that capability natively or not. This plugin was inspired by a similar filter in the Widget Logic plugin, and essentially duplicates that functionality, but with more flexibility.