How to use variable inside parameter $_GET? example: ($_GET[$my_var])

Question

I\'m developing a plugin for wordpress, the parameter of the $ _GET is recorded in the database according to the preference of the User via the Wordpress Admin Panel. The follow

Answer 1

if($_GET[$url_before] != ""){ 
    if($_GET[$url_before]=="nosupport"){ // note no "" here
        // my function goes here...
    }
}

In your solution, the key was treated as a string, with no variables evaluated.