(PHP 5, PHP 7)
Composes a MIME header field
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
Parameters:
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.
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 » 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 |
Returns:
Returns an encoded MIME field on success, or FALSE
if an error occurs during the encoding.
Examples:
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=20Pr=C3=BCfung?=" echo iconv_mime_encode("Subject", "Prüfung Prüfung", $preferences); $preferences["scheme"] = "B"; // This yields "Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=" echo iconv_mime_encode("Subject", "Prüfung Prüfung", $preferences); ?>
See also:
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