The Walker class in WordPress is used to create hierarchical navigation links. It works by ‘walking’ — or iterating — over the data in the database and then outputting the results according to the parameters that have been set. The nice thing is that by using inheritance the class can be extended and manipulated in a child theme to output in a way that might be more suitable to the project at hand.
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One of the most common and tedious tasks for WordPress developers is constantly having to move files from local development to the remote server where it can be accessed online. Typically this will be some kind of staging server where online quirks can be sorted out and the client can have a look at the site before it is published. File updates, if coded correctly, will generally not cause any problem since the internal linking should all be relative. But content changes of any kind will affect the database and require the database records to be adjusted, and that is where the tedium can set it.
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