urldecode adds slashes 3 times on a single quote. Why?

Hi there, I want to transfer a message back to the form if an error occures. Therefore I am encoding the message and afterwards decoding. Works fo far with one exeption. The single quote is slashed 3 times. Example: $message = That's great! Code: example.php?message=".urlencode($message)." <textarea name="message" rows="10" cols="53" wrap="virtual">'.urldecode($message).'</textarea> Result: That\\\'s great! So whats wrong? I can't see the mistake. Thanx for any help Andy