Redirect via GET is loosing characters

Hi there, I am checking plausability inside a php script that receives a POST submit. If an error occures the user should be redirected back, along with his original data filled into the forms. There is a problem with this. As the GET method, which the redirect is using, only allows a certain amount of characters, the text is always cut down. I use this: HEADER("Location:".$data[rurl]."?error=".$error.$parameter); Is there a way to redirect the user to the form and fill in large text? Thank you for your help, Best regards, Merlin