Reply To: Content Filtering Using Fields – Issues

• jberg1

• November 9, 2020 at 5:00 am

add_action('pre_get_posts', 'my_pre_get_posts', 10, 1);

function my_pre_get_posts( $query ) {
	
	// bail early if is in admin
	if( is_admin() ) return;
	
	
	// bail early if not main query
	// - allows custom code / plugins to continue working
	if( !$query->is_main_query() ) return;
	
	
	// get meta query
	$meta_query = $query->get('meta_query');
	
	// loop over filters
	foreach( $GLOBALS['my_query_filters'] as $key => $name ) {
		
		// continue if not found in url
		if( empty($_GET[ $name ]) ) {
			
			continue;
			
		}
		
		
		// get the value for this filter
		// eg: http://www.website.com/events?city=melbourne,sydney
		$value = explode(',', $_GET[ $name ]);

		
		// append meta query
	foreach( $value as $val )
    {
    	$meta_query = [
	 [
	     'key'		=> $name,
            'value'		=> '"' . $val . '"',
            'compare'	=> 'LIKE',
        ],
	];
}
        
	} 
	
	
	// update meta query
	$query->set('meta_query', $meta_query);

}