Description

PHP8.0.x or earlier will decode correctly, but PHP8.1.x will output undecoded strings.

The following code:

<?phpechomb_decode_mimeheader(mb_encode_mimeheader('１２３４５６７８９０１２３４５６７８９０１２','ISO-2022-JP-MS','B'));

Resulted in this output:

１２３４５６７８９０１２３４５６７８#9#0#1#2

But I expected this output instead:

１２３４５６７８９０１２３４５６７８９０１２

PHP Version

PHP 8.1.6

Operating System

Ubuntu 20.04