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Editorial Team
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Asked: 2026-06-10T05:38:38+00:00

Im very new to WordPress. I was going through Smooth Slider WP Plugin and

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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?

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1 Answer

  1. Editorial Team

    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).

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