wamp server in green. $HTTP_GET_VARS and $_GET no found

Question

I have a wamp server in green. PHP code found but $HTTP_GET_VARS and $_GET no found.

The page have this URL:

http://localhost/workfis/login.php?errorUsuario=vacio

The page have this code:

$variable1=$_GET['errorUsuario']=="vacio";
echo $variable1;
$variable2=$HTTP_GET_VARS['errorUsuario']=="vacio";
echo $variable2;

variable1 and variable2 dont print.

Answer 1

It looks like you're trying to assign the variable and compare it in the same statement. It will help to separate the two statements like so:

if(isset($_GET["errorUsuario"])){  // ensures value is set

    $variable1=$_GET['errorUsuario'];  // use = to assign a value

    if ($variable1 == "vacio"){       // use == to compare two values (returns true or false)
        echo $variable1;  // this will only print if the value is "vacio"
    }
}