Cannot use object of type WP_Query as array SOLUTION

I found the issue someone had here https://www.ads-software.com/support/topic/bug-cannot-use-object-of-type-wp_query-as-array?replies=4, and on some other places. The issue happens because plugin has function:

/**
 * Detects post ID
 *
 * @return integer
 */
function w3_detect_post_id() {
    global $posts, $comment_post_ID, $post_ID;

    if ($post_ID) {
        return $post_ID;
    } elseif ($comment_post_ID) {
        return $comment_post_ID;
    } elseif (is_single() || is_page() && count($posts)) {
        return $posts[0]->ID;
    } elseif (isset($_REQUEST['p'])) {
        return (integer) $_REQUEST['p'];
    }

    return 0;
}

And if you are on a custom page where you defined your query as

$posts= new WP_Query( $args );

Your object $posts will overwrite the global posts variable in the plugin and you’ll get this error.

To get around this, just rename your query object to $posts_myname or similar and you won’t have any issues.

Just thought that might help someone in the future ??

https://www.ads-software.com/plugins/w3-total-cache/