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I'm trying to modify the thumbnail sizes in a related posts plugin using a filter.

This is the code for applying the filter which is in the plugin file for displaying the front end output:

$thumb_size = apply_filters( 'bawmrp_thumb_size', array( 100, 100 ) );.

I tried placing the following code in my functions.php file but it's not working:

add_filter( 'bawmrp_thumb_size', 'related_posts_custom_thumbnail_size' );

function related_posts_custom_thumbnail_size () {
$custom_thumb_size = array( 200, 100 );
return $custom_thumb_size;
}
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  • Where are you putting this piece of code? Where is apply_filters( 'bawmrp_thumb_size', array( 100, 100 ) ) located? Also, it seems to me you are trying to change a registered image size, right? So after changing it did you perform an upload in order to see if it's really not working? Mar 1, 2017 at 11:51
  • Hi, I've updated the question to include the information you asked about.
    – jrcollins
    Mar 1, 2017 at 21:02

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