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In PHP, the iconv_mime_encode function is used to encode non-ASCII characters into MIME-compatible strings. It is often used for encoding text in email headers or for creating email attachments.

Here is an example to illustrate how to use iconv_mime_encode:

php
$subject = "邮件标题";
$subjectEncoded = iconv_mime_encode("Subject", $subject);
echo $subjectEncoded;


The output of this example will be:


Subject: =?UTF-8?B?6K6h55qE5piv?=



In the example, the Subject is the header name to be encoded, and $subject is the text to be encoded. The function returns a string that includes the header name, encoding type, and the encoded value.

In this case, =?UTF-8?B?6K6h55qE5piv?= is the encoded representation of the $subject string in UTF-8. The =?UTF-8?B? indicates the encoding type (UTF-8) followed by the actual encoded value (6K6h55qE5piv).

Note that this encoded string can be used directly in email headers or in other MIME-related contexts.