ZF-8717: Add UrlSafe base64 encoding to Zend_Mime


Base64 encoding might be useful for passing binary data via URLs or cookies (since it produces shorter strings then hexdigest). See http://en.wikipedia.org/wiki/Base64/…

But by default base64 is not urlsafe and there is no urlsafe version in native PHP (at least yet). So I propose to add trivial methods encodeBase64UrlSafe and decodeBase64UrlSafe to Zend_Mime compatible with python's base64.urlsafe_b64encode:

static function encodeBase64UrlSafe($value)
   return str_replace(array('+', '/'), array('-', '_'), base64_encode($value));

static function decodeBase64UrlSafe($value)
   return base64_decode(str_replace(array('-', '_'), array('+', '/'), $value));


Sorry, I have been inactive since last April.