Commit b4c31fb79db for php

commit b4c31fb79dbfb7398ce5112a488640e36d13e149
Merge: e380489c143 8906dc25186
Author: Daniel Scherzer <daniel.e.scherzer+phpf@gmail.com>
Date:   Mon Sep 28 16:56:26 2026 -0700

    Merge branch 'PHP-8.6'

    * PHP-8.6:
      ext/mbstring: assert that `mb_wchar_to_uuencode()` pointer write is in bounds (#23955)