imap_mime_header_decode
(PHP 4, PHP 5, PHP 7, PHP 8)
imap_mime_header_decode — Decode MIME header elements
说明
Decodes MIME message header extensions that are non ASCII text (see » RFC2047).
参数
string-
The MIME text
返回值
The decoded elements are returned in an array of objects, where each
object has two properties, charset and
text.
If the element hasn't been encoded, and in other words is in
plain US-ASCII, the charset property of that element is
set to default.
The function returns false on failure.
示例
示例 #1 imap_mime_header_decode() example
<?php
$text = "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?= <keld@example.com>";
$elements = imap_mime_header_decode($text);
for ($i=0; $i<count($elements); $i++) {
echo "Charset: {$elements[$i]->charset}\n";
echo "Text: {$elements[$i]->text}\n\n";
}
?>以上示例会输出：
Charset: ISO-8859-1 Text: Keld Jørn Simonsen Charset: default Text: <keld@example.com>
In the above example we would have two elements, whereas the first element had previously been encoded with ISO-8859-1, and the second element would be plain US-ASCII.
用户贡献的备注 1 note
A nice way to decode strings is to use the mb_list_encodings(), but I had two problems with it:
sometimes, the charset is uppercase in the header an lowercase in mb_list_encodings() and sometimes, the charset is not in the mb_list_encodings() list.
<?php
function upperListEncode() { //convert mb_list_encodings() to uppercase
$encodes=mb_list_encodings();
foreach ($encodes as $encode) $tencode[]=strtoupper($encode);
return $tencode;
}
function decode($string) {
$tabChaine=imap_mime_header_decode($string);
$texte='';
for ($i=0; $i<count($tabChaine); $i++) {
switch (strtoupper($tabChaine[$i]->charset)) { //convert charset to uppercase
case 'UTF-8': $texte.= $tabChaine[$i]->text; //utf8 is ok
break;
case 'DEFAULT': $texte.= $tabChaine[$i]->text; //no convert
break;
default: if (in_array(strtoupper($tabChaine[$i]->charset),upperListEncode())) //found in mb_list_encodings()
{$texte.= mb_convert_encoding($tabChaine[$i]->text,'UTF-8',$tabChaine[$i]->charset);}
else { //try to convert with iconv()
$ret = iconv($tabChaine[$i]->charset, "UTF-8", $tabChaine[$i]->text);
if (!$ret) $texte.=$tabChaine[$i]->text; //an error occurs (unknown charset)
else $texte.=$ret;
}
break;
}
}
return $texte;
}
?>备份地址：http://www.lvesu.com/blog/php/function.imap-mime-header-decode.php