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',
);
}
}
?>
