so i’m making a tool that i plan on selling its like an api so normally they do this website.com/file.php?tool=123
but i want it so its website.com/file.php?key=1923712937?tool=123
any idea on how to do this 
thanks in advance for helping me
Strider gave you the answer, but, didn’t explain how it works.
You add arguments using the php?somevariable=somevalue …
But, if you need a second argument, you use an ampersand to add the second one.
Like: php?somvevariable=somevalue&someothervariable=someothervalue …
At the other end, these turn into “GETs” $variable2=$_GET[“someothervariable”];
Hope that explains it for you…