PHP：通过点击链接在URL中传递变量

I created a function that requires one parameter to be passed into it but I need that parameter to come from another script. How do I embed the variable into a link then put that variable into the function in another script? I know I need to utilize $_GET, isset($_GET['']) and a href but I just can't put it all together.

$_GET is collection of of query string parameters. If you had a url like: test.php?param1=foo&param2=bar you can access foo by $_GET['param1'] etc..

Use $_REQUEST['something']
Your link must be:

<a href="test.php?something=something&something1=test">Click Me</a>

Inside test.php

if(@$_REQUEST['something']=="something"){
    echo $_REQUEST['something1'];
    }

When you click Click Me, test.php would echo "test".