The above code checks to see if the “register_sidebar” function exists, and if it does, it runs that function. The “register_sidebar” function takes an array of arguments. The first argument is “before_widget”, which is the code that will run before each widget. The second argument is “after_widget”, which is the code that will run after each widget. The third argument is “before_title”, which is the code that will run before the title of each widget. The fourth and final argument is “after_title”, which is the code that will run after the title of each widget.
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