Including 2 Negative Is_Template Conditionals in header.php [closed]
(Expanding on Pieter’s comment above, and explaining the logic behind it…) if() evaluates the conditions in the parentheses, and that evaluation results in either TRUE or FALSE for the sum total (which can change, depending on how the various conditions are combined). In plain English, if( !is_singular(‘device’) || !is_front_page() ) means, “If it’s either true … Read more