iconv_mime_decode_headers()

(PHP 5, PHP 7)

一次性解码多个MIME头字段

说明

iconv_mime_decode_headers(string $encoded_headers[,int $mode= 0[,string $charset= ini_get("iconv.internal_encoding")]]): array

一次性解码多个MIME头字段。

参数

$encoded_headers

编码过的头，是一个字符串。

$mode

$mode决定了iconv_mime_decode_headers()遇到畸形MIME头字段时的行为。你可以指定为以下位掩码的任意组合。

**iconv_mime_decode_headers()**接受的位掩码
值	常量	描述
1	ICONV_MIME_DECODE_STRICT	如果设置了，给定的头将会以» RFC2047定义的标准完全一致。这个选项默认禁用，因为大量有问题的邮件用户代理不遵循标准并产生不正确的MIME头。
2	ICONV_MIME_DECODE_CONTINUE_ON_ERROR	如果设置了，iconv_mime_decode_headers()尝试忽略任何语法错误并继续处理指定的头。

$charset

可选参数$charset指定了字符集结果的表现。如果省略了，将使用iconv.internal_encoding。

返回值

成功时返回$encoded_headers指定的MIME头的整套关联数组，解码时出现错误则返回FALSE。

返回元素的每个键代表独立字段名，相应的元素代表一个字段值。如果有多个同一名称的字段，iconv_mime_decode_headers()自动将他们按出现顺序结合成数字索引的数组。

范例

iconv_mime_decode_headers()例子

<?php
$headers_string = <<<EOF
Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=
To: example@example.com
Date: Thu, 1 Jan 1970 00:00:00 +0000
Message-Id: <example@example.com>
Received: from localhost (localhost [127.0.0.1]) by localhost
    with SMTP id example for <example@example.com>;
    Thu, 1 Jan 1970 00:00:00 +0000 (UTC)
    (envelope-from example-return-0000-example=example.com@example.com)
Received: (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000
EOF;
$headers =  iconv_mime_decode_headers($headers_string, 0, "ISO-8859-1");
print_r($headers);
?>

以上例程会输出：

Array
(
    [Subject] => Prüfung Prüfung
    [To] => example@example.com
    [Date] => Thu, 1 Jan 1970 00:00:00 +0000
    [Message-Id] => <example@example.com>
    [Received] => Array
        (
            [0] => from localhost (localhost [127.0.0.1]) by localhost with SMTP id example for <example@example.com>; Thu, 1 Jan 1970 00:00:00 +0000 (UTC) (envelope-from example-return-0000-example=example.com@example.com)
            [1] => (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000
        )
)

参见

iconv_mime_decode()解码一个MIME头字段
mb_decode_mimeheader()解码 MIME 头字段中的字符串
imap_mime_header_decode()Decode MIME header elements
imap_base64()Decode BASE64 encoded text
imap_qprint()Convert a quoted-printable string to an 8 bit string

If you need lower-case header-names (as I read the documentation case is not guranteed) try something like
<?php
$headers_string = <<<EOF
Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=
To: example@example.com
Date: Thu, 1 Jan 1970 00:00:00 +0000
Message-Id: <example@example.com>
Received: from localhost (localhost [127.0.0.1]) by localhost
  with SMTP id example for <example@example.com>;
  Thu, 1 Jan 1970 00:00:00 +0000 (UTC)
  (envelope-from example-return-0000-example=example.com@example.com)
Received: (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000
EOF;
$headers = iconv_mime_decode_headers($headers_string, 0, "ISO-8859-1");
$headers = array_combine(array_map("strtolower", array_keys($headers)), array_values($headers));
print_r($headers);
?>