(PHP 3 >= 3.0.15, PHP 4, PHP 5)
Converts ISO-8859-1 string to modified UTF-7 text
( string data )
Converts data to modified UTF-7
text. Note that data is expected to be
encoded in ISO-8859-1.
This is needed to encode mailbox names that contain certain
characters which are not in range of printable ASCII characters.
The modified UTF-7 encoding is defined in RFC 2060, section 5.1.3
(original UTF-7 was defined in RFC1642).
See also: imap_utf7_decode().