iconv_mime_encode
(PHP 5)
iconv_mime_encode -- Composes a
MIME header field
Description
string
iconv_mime_encode ( string field_name, string field_value [, array preferences])
Composes and returns a string that represents a valid MIME header field, which looks like the following:
Subject: =?ISO-8859-1?Q?Pr=FCfung_f=FCr?= Entwerfen von einer MIME kopfzeile |
In the above example, "Subject" is the field name and the portion that begins with "=?ISO-8859-1?..." is the field value.
You can control the behaviour of iconv_mime_encode() by specifying an associative array that contains configuration items to the optional third parameter preferences. The items supported by iconv_mime_encode() are listed below. Note that item names are treated case-sensitive.
Таблица 1. Configuration items supported by iconv_mime_encode()
| Item |
Type |
Description |
Default value |
Example |
| scheme |
boolean |
Specifies the method to encode a field value by. The value of this item may be either "B" or "Q", where "B" stands for base64 encoding scheme and "Q" stands for quoted-printable encoding scheme. |
B |
B |
| input-charset |
string |
Specifies the character set in which the first parameter field_name and the second parameter field_value are presented. If not given, iconv_mime_encode() assumes those parameters are presented to it in the iconv.internal_charset ini setting. |
iconv.internal_charset |
ISO-8859-1 |
| output-charset |
string |
Specifies the character set to use to compose the MIME header. If not given, the same value as input-charset will be used. |
the same value as input-charset |
UTF-8 |
| line-length |
integer |
Specifies the maximum length of the header lines. The resulting header is "folded" to a set of multiple lines in case the resulting header field would be longer than the value of this parameter, according to RFC2822 - Internet Message Format. If not given, the length will be limited to 76 characters. |
76 |
996 |
| line-break-chars |
string |
Specifies the sequence of characters to append to each line as an end-of-line sign when "folding" is performed on a long header field. If not given, this defaults to "\r\n" (CR LF). Note that this parameter is always treated as an ASCII string regardless of the value of input-charset. |
\r\n |
\n |
Пример 1. iconv_mime_encode() example:
<?php
$preferences = array(
"input-charset" => "ISO-8859-1",
"output-charset" => "UTF-8",
"line-length" => 76,
"line-break-chars" => "\n"
);
$preferences["scheme"] = "Q";
// This yields "Subject: =?UTF-8?Q?Pr=C3=BCfung_Pr=C3=BCfung?="
echo iconv_mime_encode("Subject", "Prьfung Prьfung", $preferences);
$preferences["scheme"] = "B";
// This yields "Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?="
echo iconv_mime_encode("Subject", "Prьfung Prьfung", $preferences);
?> | |
Смотрите также imap_binary(), mb_encode_mimeheader() and imap_8bit().