<https://forums.phpfreaks.com/topic/165217-solved-help-needed-with-passing-id-through-url/page/2/#comment-871466>
<http://schema.org/text>
"Thanks for your help! \n  \n\nI fixed the spelling and no more errors.  However, it is still not echoing, not even the: \n  \n\n echo $_GET['cat']; \n"
<https://forums.phpfreaks.com/topic/165217-solved-help-needed-with-passing-id-through-url/page/2/?tab=comments#comment-871506>