apply_filters_ref_array( ‘post_limits’, string $limits, WP_Query $query )

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   Steven Lin 5 years ago

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   Example migrated from Codex:

   The example below allows your query to return 25 results only for the search page. All other queries will continue to return the default value.

   /**
    * Limit the main query search results to 25.
    *
    * We only want to filter the limit on the front end of the site, so we use
    * is_admin() to check that we aren't on the admin side.
    *
    * We also only want to filter the main query, so we check that this query is
    * the main query with $this->is_main_query().
    *
    * Finally, we only want to change the limit for searches, so we check that
    * this query is a search with $this->is_search().
    *
    * @see https://developer.wordpress.org/reference/hooks/post_limits/
    * 
    * @param string $limit The 'LIMIT' clause for the query.
    * @param object $this The current query object.
    *
    * @return string The filtered LIMIT.
    */
   function wpcodex_filter_main_search_post_limits( $limit, $this ) {
   
   	if ( ! is_admin() && $this->is_main_query() && $this->is_search() ) {
   		return 'LIMIT 0, 25';
   	}
   
   	return $limit;
   }
   add_filter( 'post_limits', 'wpcodex_filter_main_search_post_limits', 10, 2 );