Core:
    Fixed bug #80929 (Method name corruption related to repeated calls to call_user_func_array).
    Fixed bug #80960 (opendir() warning wrong info when failed on Windows).
    Fixed bug #67792 (HTTP Authorization schemes are treated as case-sensitive).
    Fixed bug #80972 (Memory exhaustion on invalid string offset).
FPM:
    Fixed bug #65800 (Events port mechanism).
FTP:
    Fixed bug #80901 (Info leak in ftp extension).
    Fixed bug #79100 (Wrong FTP error messages).
GD:
    Fixed bug #81032 (GD install is affected by external libgd installation).
MBString:
    Fixed bug #81011 (mb_convert_encoding removes references from arrays).
ODBC:
    Fixed bug #80460 (ODBC doesn't account for SQL_NO_TOTAL indicator).
PDO_MySQL:
    Fixed bug #81037 (PDO discards error message text from prepared statement).
PDO_ODBC:
    Fixed bug #44643 (bound parameters ignore explicit type definitions).
pgsql:
    Fixed php_pgsql_fd_cast() wrt. php_stream_can_cast().
SPL:
    Fixed bug #80933 (SplFileObject::DROP_NEW_LINE is broken for NUL and CR).
Opcache:
    Fixed bug #80900 (switch statement behavior inside function).
    Fixed bug #81015 (Opcache optimization assumes wrong part of ternary operator in if-condition).
XMLReader:
    Fixed bug #73246 (XMLReader: encoding length not checked).
Zip:
    Fixed bug #80863 (ZipArchive::extractTo() ignores references).