iconv_mime_encode
(PHP 5)
iconv_mime_encode — Composes a MIME header field
说明
string iconv_mime_encode
( string $field_name
, string $field_value
[, array $preferences = NULL
] )
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.
参数
field_name
The field name.
field_value
The field value.
preferences
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.
Configuration items supported by iconv_mime_encode()
Item
Type
Description
Default value
Example
scheme
string
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_encoding
ini setting.
iconv.internal_encoding
ISO-8859-1
output-charset
string
Specifies the character set to use to compose the
MIME header.
iconv.internal_encoding
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
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