Question

I have examined various discussions about how to pass php variable in a url but haven’t seen any with the simple situation I’m interested in. Also I would like to be absolutely sure I’m getting an up-to-date solution.

In a digital book, I want to link to mypage2.php and include a variable $video. How do I pass this variable safely, and how do I “detect” $video and its current value of “oil-spill”?

Thank you very much.

Answer 1

Make a link like:

printf('<a href="mypage2.php?video=%s">Link</a>', htmlspecialchars($video, ENT_COMPAT));

On mypage2.php, check if the query parameter is in the URL:

if (!isset($_GET['video'])) {
    die('I need that query parameter!');
}

$video = $_GET['video'];