- urldecode: documentation ( source)
<?php
echo urldecode("https://accounts.google.com/o/oauth2/auth?client_id=765635323633-dte4g53pbh6c3290t78c370ep52ph296.apps.googleusercontent.com&redirect_uri=http%3A%2F%2Fvacationfish.com%2Fauth%2Fgoogle%2Foauth2callback&response_type=code&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email");