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* PHP-8.4: Fix phpGH-23758: PDO_Firebird returns null for empty BLOBs (php#23763)
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* PHP-8.5: Fix phpGH-23758: PDO_Firebird returns null for empty BLOBs (php#23763)
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* upstream/master: (99 commits) NEWS Fix property hook escape analysis causing misoptimization Fix __isset escape analysis causing misoptimization Fix memory leak when closing a statement on a killed connection Reset field_count for OK packet (php#23890) Fix phpGH-23986: Clear the realpath cache in the child after pcntl_fork() (php#23987) ext/standard: Remove redundant if-branch in rot13 (php#23795) ext/pdo: Throw a ValueError from bindColumn() for an unknown column (php#23835) Zend: rename zend_object* parameter to "this_ptr" for zend_call_* functions (php#23989) ext/pdo: Release driver options after bindParam and bindColumn tests: Raise test stack for stream error depth limit under MSan (php#23985) Zend: Remove zend_atomic.[ch] abstraction (php#23927) fibers: fix phpGH-23921 (Fibers start with error_reporting = 0 when the error_reporting INI directive is not set) ext/pdo: Keep statement class when ATTR_STATEMENT_CLASS is rejected Verify bundled sources using CI - Opcache JIT IR (php#20179) zend_portability: Simplify definition of `ZEND_NORETURN` (php#23908) Fix phpGH-23758: PDO_Firebird returns null for empty BLOBs (php#23763) Remove redundant parentheses in session tests (php#23609) Update IR (php#23861) Fix OSS-Fuzz #552682112: assertion failure wrt zp_arg_must_be_sent_by_ref() (php#23760) ... # Conflicts: # ext/openssl/xp_ssl.c
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php_firebird_fetch_blob()only assigns the fetched string when the BLOB has a non-zero length, so a stored empty BLOB left the result zval at the NULL that PDO initialises it to. Callers could not tell an empty BLOB apart from SQL NULL, even though Firebird stores them distinctly.An empty BLOB now yields an empty string. SQL NULL still returns null, since that case is handled earlier in
pdo_firebird_stmt_get_col().Fixes #23758