(PHP 4, PHP 5, PHP 7, PHP 8)
imap_8bit — Convert an 8bit string to a quoted-printable string
$string): string|falseConvert an 8bit string to a quoted-printable string (according to ? RFC2045, section 6.7).
stringThe 8bit string to convert
Returns a quoted-printable string, 或者在失敗時(shí)返回 false.