How to encrypt url that contains an email address

Using php, is there a way to code this so that the email address can't be harvested?

https://www.paypal.com/us/verified/pal=paypal%40mydomain%2ecom

Thanks,
Errica

Sure-- use the mcrypt functions.

http://us.php.net/manual/en/function.mcrypt-encrypt.php

http://us.php.net/manual/en/function.mcrypt-decrypt.php