Search widgets filter to posts only

Restrict native search widgets to the ‘post’ post type exclusively.

add_filter( 'widget_title', function( $title, $instance, $id_base ) {

	if( 'search' === $id_base ) {
		add_filter( 'get_search_form', function( $html ) {
			remove_filter( current_filter(), __FUNCTION__ );
			return str_replace( 
				'</form>', 
				'<input type="hidden" name="post_type" value="post" /></form>',
				$html
			);
		} );
	}

	return $title;

}, 10, 3 );

Instructions for Search widgets filter to posts only

  1. Log into a staging or locally hosted clone of your site.
  2. Install and activate Code Snippets plugin.
  3. WP Admin > Snippets > Add New
  4. Copy and paste the code from the section above.
  5. Check to ensure formatting came over properly.
  6. Customize the code as desired.
  7. Add a meaningful title.
  8. Select whether to run on front-end or back-end (or both).
  9. Click “Save and Activate”.
  10. Test your site to ensure it works.
  11. Disable if any problems, or recover.
  12. Repeat for live environment.

Need help modifying Search widgets filter to posts only?

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License

All code snippets are licensed GPLv2 (or later) matching WordPress licensing.

Except when otherwise stated in writing the copyright holders and/or other parties provide the program as-is without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Disclaimer of warranty
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