Dynamic PHP Content via Query Strings - php

Question

I'm wanting to use a pair of query strings to generate specific page content
query string example:
example.co.uk/index.php?brand=apple&video=red
I've managed to use some simple PHP to replace the div id's with query brand with some help as follows:
<?php
$recognised_brands = array(
"apple",
"orange",
// etc
);
$default_brand = $recognised_brands[0]; // use first from list arbitrarily.
$brand_to_use = isset($_GET['brand']) && in_array($_GET['brand'], $recognised_brands)
? $_GET['brand']
: $default_brand;
echo '<div id="' . $brand_to_use . '"></div>';
?>
However I'm unsure on how to do similar for the second query called video.
If for example they query is ?brand=apple&video=red
Then I'd want to replace the video var in the page code to the correct number for red but I don't know how to add a list of these variables based on the video query like: red => 1 which then echo's 1 into the correct area?
Also based on the video selected I'd like part of the heading text to change and a paragraph of code below it but also unsure on where is best to specify this:
To try and clarify:
I have my brand query sorted
I need to make my video query populate multiple areas headings, video id and content div's but not sure how!

Answer 1

If I understood your question correctly, this would do what you are looking for:
$videoToNum = array("red" => 1,
"blue" => 2,
"yellow" => 3);
$videoValue = ((isset($_GET['video']) && isset($videoToNum[$_GET['video']])) ? $videoToNum[$_GET['video']] : null);
if($videoValue) {
echo '<div id="' . $videoValue . '"></div>';
}
The question is rather vague though, so you may want to elaborate further if this doesn't help.
Edit: Here's an example of a switch as discussed in the comments:
$video = (isset($_GET['video']) ? $_GET['video'] : null);
if($video) {
switch($video) {
case "red":
//do red stuff
break;
case "blue":
//do blue stuff
break;
case "yellow":
//do yellow stuff
break;
}
}