What's "function_exists" in Wordpress
wordpress
Solution
function_exists is a PHP function, not limited to WordPress.
From the manual "Checks the list of defined functions, both built-in (internal) and user-defined, for function_name."
It returns true or false on whether or not the function exists. So you can either create a new function before it that does something slightly different, or prevent an error if it doesn't exist (normally because the required file hasn't been included).
Problem
Im very new to WordPress. I was going through Smooth Slider WP Plugin and saw ``` if ( function_exists( 'get_smooth_slider_category' ) ) { get_smooth_slider_category('Uncategorized'); } ``` This pretty much gives what I wanted, but not quite. This pulls all the content in the category and what Im after is just the image URL. My question is whats "function_exists" in wordpress? and I checked get_smooth_slider_category in functions.php file but couldnt find any. Can someone please explain how function_exists works?