In PHP, the iconv_mime_encode() function is used to compose MIME header fields. This is a built-in PHP function.
string iconv_mime_encode(string $field_name, string $field_value, array $options=[])
iconv_mime_encode() The function is used to combine and return a string representing a valid MIME header field as shown below-
Subject: =ISO-8859-1?Q?Pr=FCfung_f=FFCr?= Entwerfen von einer MIME kopfzeile
Note -In the above example, Subject - is the field name, ending with "=ISO-8859-1?..."# The part starting with ## is the field value.
Parametersiconv_mime_encode()Accepts three different parameters− $field_name, $field_value, and $options.
$field_name - This parameter is used for the field name.
#$field_value - This parameter is used for the field value.
$options - Using this parameter, you can control the behavior of iconv_mime_encode() by specifying an associative array that contains configuration of optional parameters item.
iconv_mime_encode()
| This scheme specifies the method for encoding field values. The item value can be B (base64) or Q (quoted-printable) encoding scheme.
| # #Input character set | String | ||
Specifies the character set, field_name is the first parameters, field_value is the second parameter. If these arguments are not given, the iconv_mime_encode() function assumes that it may be present in the iconv.internal_charset ini setting. | iconv.internal_charset | ##ISO-8859-1 | Output character set | String |
| It specifies the character set used to make up the MIME header. If not given, it will use the input character set value. | input_charset is used as the default value | ##UTF-8
| Line length | ##Integer |
| 76 | ##996 |
| Line break | String |
| " (CR LF) | ##\r##Example 1 - Use "Q" quotes to print the encoding scheme Live Demo <?php
// used configuration items supported by iconv_mime_encode()
$options = array(
"input-charset" => "ISO-8859-2",
"output-charset" => "UTF-8",
"line-length" => 76,
"line-break-chars" => ""
);
// Q quoted-printable encoding scheme is used
$options["scheme"] = "Q";
// Below code will show the result as
// "Subject: =?UTF-8?Q?Pr=C3=BCfung=20Pr=C3=BCfung?="
echo iconv_mime_encode("Subject", "Prüfung Prüfung", $options);
?>Copy after login | Output Subject: =?UTF-8?Q?Pr=C3=83=C2=BCfung=20Pr=C3=83=C2=BCfung?= Copy after login <?php
// used configuration items supported by iconv_mime_encode()
$options = array(
"input-charset" => "ISO-8859-1",
"output-charset" => "UTF-8",
"line-length" => 76,
"line-break-chars" => ""
);
// B base64 encoding scheme is used
$options["scheme"] = "B";
// Below code will show the result as
//"Subject: =?UTF-8?B?UHJlw4PCp29zIE9sw4PCoC50eHQ=?="
echo iconv_mime_encode("Subject", "Preços Olà.txt", $options);
?>Copy after login Subject: =?UTF-8?B?UHJlw4PCp29zIE9sw4PCoC50eHQ=?= Copy after login The above is the detailed content of Use the iconv_mime_encode() function to build a PHP code for a MIME header field. For more information, please follow other related articles on the PHP Chinese website!
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source：tutorialspoint.com
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