meta_query Array

Probably what you wnat do is :

update_post_meta( $post_id, $meta_key, serialize($meta_value));

or to create :

add_post_meta( $post_id, $meta_key, serialize($meta_value));

or to delete :

delete_post_meta( $post_id, $meta_key);

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)