Result 'A quick brown fox jumps over the lazy dog.'

##</code><code>##

       encode_base64( $bytes )
       encode_base64( $bytes, $eol );
           Encode data by calling the encode_base64() function.  The first
           argument is the byte string to encode.  The second argument is the
           line-ending sequence to use.  It is optional and defaults to "\n".
           The returned encoded string is broken into lines of no more than 76
           characters each and it will end with $eol unless it is empty.  Pass
           an empty string as second argument if you do not want the encoded
           string to be broken into lines.