PHP. Руководство по PHP. 2005
imap_8bit
imap_8bit
Description
string imap_8bit (string string)Convert an 8bit string to a quoted-printable string (according to RFC2045, section 6.7).
Returns a quoted-printable string.
See also imap_qprint().
IMAP, POP3 and NNTP Functions
imap_alerts