Failed to convert "㎡" using mb_convert_encoding

[da-inoue]

Description

The PHP code below was saved as "character code: EUC-JP" and executed on the server with "mb_internal_encoding: EUC-JP".
The result is below.

I was hoping that the shift-jis encoding would display "㎡", but in "PHP 8.4.2" it did not work as expected.
I would like to know whether the change in behavior is a specification change or a bug.

The following code:

<?php
echo mb_convert_encoding('㎡' ,"shift-jis", "euc-jp");

Resulted in this output:

「?」

But I expected this output instead:

「㎡」

PHP Version

PHP 8.4.2

Operating System

No response

[youkidearitai]

㎡ is not contain JIS X 0208. This means not contain Shift_JIS and EUC-JP

• http://charset.7jp.net/euc.html
• http://charset.7jp.net/sjis.html

Maybe you can use SJIS-win and eucJP-win.

[youkidearitai]

Please see: https://3v4l.org/rETRU

[da-inoue]

Thank you for your prompt reply.

I understand that the control is based on the "JIS X 0208" map and is as intended.
Thank you again for providing the code.

Thank you for your kind response.