First of all i feel really stupid of not seeing this problem and not finding an answer on the interweb already. Here is my input class:
<?php
namespace lib\Api;
class Input {
public $value;
public function get($name){
    if(isset($_POST[$name])){
         return $_POST[$name];
    }else if(isset($_GET[$name])){
         return $_GET[$name];
    }
    return null;
}
public function equals($argument){
    $this->getValue() == $argument ? true : false;
}
//etc
}
?> 
Then if i put a invallid $_GET[$name] in there, it is giving the error: Undefined index
Hoping someone can help.
 
    