ERROR 0 - Object of class stdClass could not be converted to string

Question

The code where the error occurs is:

$css .= 'height:'.$gallery_height.'px;';
$css = '';
if($gallery_height){
    $css .= $addon_id .' .sppb-gallery-parallax:after {';
    $css .= 'height:'.$gallery_height.'px;';
    $css .= '}';

    $css .= '@media (min-width: 768px) and (max-width: 991px) {';

    $css .= $addon_id .' .sppb-gallery-parallax:after {';
    $css .= 'height:'.$gallery_height_sm.'px;';
    $css .= '}';

    $css .= '}';

    $css .= '@media (max-width: 767px) {';

    $css .= $addon_id .' .sppb-gallery-parallax:after {';
    $css .= 'height:'.$gallery_height_xs.'px;';
    $css .= '}';

    $css .= '}';
}
return $css;

Answer 1

The first line is trying to concatenate a string onto the end of $css, but $css would have to already be a string (or be a variable type that can be cast to a string, like an integer) for that to work. If it's an object then that would cause your error. We'd need to see how and where $css gets generated in the first place.

The second line is sticking out for me.

$css = '';

It completely overrides the line before it and makes it pointless, as well as any earlier references to $css that aren't included in the code above. I would point this out to the template developers in case it has been left in by error.