Adding variables to url – is it possible?

  • An example permalink at the top of a post (with the a replaced by x to display here):

    <h2 >< x href=”https://www.mysite.com/index.php/whatever/&#8221; rel=”bookmark” title=”Permanent Link to whatever”>
    whatever</h2>

    In what way would WP react if I manually added a variable to that link? Is this even theoretcially possible?

    For example,

    <h2 ><x href=”https://www.mysite.com/index.php/whatever/?bg=green&#8221; rel=”bookmark” title=”Permanent Link to whatever”>
    whatever</h2>

    I want to be able to pass the background colour from one post in a multi-post page to a single post

    Anyone out there with PHP knowledge of WP?

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