How do you assign a class to the "Shop" page

What error and what code?

Here is the code snippet.

//* Add custom body class to the head
add_filter( 'body_class', 'bg_shop_add_body_class' );
function bg_shop_add_body_class( $classes ) {
  if (is_shop()) {
    $classes[] = 'bg-shop';
    return $classes;
  }
}

Here is the error I got. It looks like it is a conflict with Genesis..

[10-Jun-2016 14:04:59 UTC] PHP Catchable fatal error:  Argument 1 passed to genesis_custom_body_class() must be of the type array, null given in /Applications/MAMP/htdocs/bahnsengallery-v1/wp-content/themes/genesis/lib/structure/layout.php on line 61

The code the error is referring to is

/**
 * Add custom field body class(es) to the body classes.
 *
 * It accepts values from a per-post or per-page custom field, and only outputs when viewing a singular page.
 *
 * @since 1.4.0
 *
 * @uses genesis_get_custom_field() Get custom field value.
 *
 * @param array $classes Existing classes.
 *
 * @return array Amended classes.
 */
function genesis_custom_body_class( array $classes ) {

	$new_class = is_singular() ? genesis_get_custom_field( '_genesis_custom_body_class' ) : null;

	if ( $new_class )
		$classes[] = $new_class;

	return $classes;

}

I think this might be conflicting with the way Genesis allows you to create a custom class on the admin edit page. There is a field to do that. When I add a class there, it doesn’t take so I figured there must be something special with the Shop page.

That was why I was wondering if there was a special way to create a class on that page?

Bryan

Move your return $classes outside the is_shop conditional because you want to return the classes regardless of whether the condition is met or not.

eg

//* Add custom body class to the head
add_filter( 'body_class', 'bg_shop_add_body_class' );
function bg_shop_add_body_class( $classes ) {
  if (is_shop()) {
    $classes[] = 'bg-shop';
  }
  return $classes;
}

Deleted this…Jo beat me to it. Thanks Jo

if (is_shop()) {
    $classes[] = 'bg-shop';
    return $classes;
  }

should be:

if (is_shop()) {
    $classes[] = 'bg-shop';
  }
 return $classes;

This is solved. Thanks Mike