Reply To: Archive.php with custom field filter (object post)

• Elliot

• September 18, 2014 at 11:08 am

Hi @bibi.lerici

The PHP error explains it quite well:
Warning: trim() expects parameter 1 to be string, array given in http://www.mydomain.com/wp-includes/meta.php on line 107

This is telling you that you can’t use an array as your meta compare:

$newstand_selettore_stand = explode(',', $_GET['newstand_selettore_stand']);
            

$meta_query[] = array(
                'key'       => 'newstand_selettore_stand',
                'value'     => $newstand_selettore_stand,
                'compare'   => 'LIKE',

            );

Instead, loop through the array and add them like so:

<?php 

$newstand_selettore_stand = explode(',', $_GET['newstand_selettore_stand']);
            
if( !empty($newstand_selettore_stand) ) {
	
	foreach( $newstand_selettore_stand as $id ) {
		
		$meta_query[] = array(
            'key'       => 'newstand_selettore_stand',
            'value'     => $id,
            'compare'   => 'LIKE',

        );
		
	}
	
}

 ?>