Converts ISO-8859-1 string to modified UTF-7 text (PHP 3 >= 3.0.15, PHP 4, PHP 5)
string imap_utf7_encode ( 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().