I’m wondering why the following link does not validate in W3schools validator.
<a href="../anonymous/anonymous.master.php?page=showproduct.php&id=4">Dvds</a>
The issue is the & next to the id.
The error is described by;
did not start a character reference. (& probably should have been escaped as &.
I am using <!DOCTYPE html >
Because it needs to be
<a href="../anonymous/anonymous.master.php?page=showproduct.php&id=4">Dvds</a>– the & character has special meaning in HTML, so you need to escape it if you’re not writing a character code.