apply_filters( ‘category_link’, string $termlink, int $term_id )

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   Noruzzaman 1 year ago

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   WordPress hooks provide a powerful way to modify and extend the core functionality of your site. The apply_filters() function is used to apply filters to a variable, allowing you to modify data before it is used. The category_link filter specifically allows you to alter the URL of a category link before it is displayed.

   Simple Examples

   function wpdocs_category_link_filter( $termlink ) {
       // Modify the term link as needed
       $termlink .= '?custom_param=1';
   
       return $termlink;
   }
   
   add_filter( 'category_link', 'wpdocs_category_link_filter' );

   Complex Examples

   function wpdocs_category_link_filter( $termlink, $term_id ) {
       // Modify the term link only for category with ID 5
       if ( 5 === $term_id ) {
           $termlink = home_url( '/special-category/' );
       }
   
       return $termlink;
   }
   
   add_filter( 'category_link', 'wpdocs_category_link_filter', 10, 2 );

   By using apply_filters() with the category_link filter, you can easily customize the URLs of category links in WordPress. This technique allows you to tailor category links to meet your specific needs.