Another issue from UPGRADING was that "mb_detect_encoding()'s "non-strict" mode now behaves as described in the documentation" but that sounds like a bug fix, not something that needs mentioning in the documentation. The coverage in the migration guide is probably sufficient.
Another issue from UPGRADING was that "mb_detect_encoding()'s "non-strict" mode now behaves as described in the documentation" but that sounds like a bug fix, not something that needs mentioning in the documentation. The coverage in the migration guide is probably sufficient.