https://docs.phalcon.io/en/latest/Phalcon_Http_Request
public getQuery ([mixed $name], [mixed $filters], [mixed $defaultValue], [mixed $notAllowEmpty], [mixed $noRecursive])
// Returns value from $_GET["id"] without sanitizing
$id = $request->getQuery("id");
// Returns value from $_GET["id"] with sanitizing
$id = $request->getQuery("id", "int");
// Returns value from $_GET["id"] with a default value
$id = $request->getQuery("id", null, 150);