(3.0.15 - 3.0.18 only, PHP 4 >= 4.0.0)imap_utf7_encode -- Converts 8bit data to modified UTF-7 text.
Converts 8bit data to modified UTF-7 text. This is needed to encode mailbox names that contain international characters outside of the printable ASCII range. The modified UTF-7 encoding is defined in RFC 2060, section 5.1.3 (original UTF-7 was defned in RFC1642).
Returns the modified UTF-7 text.