ext/pdo: PHP 8.4 changes across PDO, PDO_PGSQL and PDO_Firebird

[lacatoire]

Documents the PHP 8.4 changes across the PDO family.

PDO core

• Default SQL parser that recognises quoted literals and comments.
• PDO::ATTR_STRINGIFY_FETCHES is now retrievable via PDO::getAttribute().
• Pdo\Pgsql::ATTR_RESULT_MEMORY_SIZE is now retrievable via PDOStatement::getAttribute().

PDO_PGSQL

• Requires libpq 10.0+.
• DSN credentials now take priority over constructor arguments.
• Using ?? inside a dollar-quoted string is deprecated.

PDO_Firebird

• Now requires a C++ compiler and fbclient 3.0+ to build.

Sources

• PDO::ATTR_STRINGIFY_FETCHES retrievable via PDO::getAttribute(): php/php-src@866aa12
• PDO_PGSQL DSN credentials take priority over constructor arguments: php/php-src@b5c287e
• PDO_PGSQL ?? inside dollar-quoted strings deprecated: php/php-src@53d7c17

[jordikroon]

Ref:

PDO:
PHP 8.4 Documentation Tracker (view)
PHP 8.4 Documentation Tracker (view)
PHP 8.4 Documentation Tracker (view)
PHP 8.4 Documentation Tracker (view)

PDO_Firebird:
PHP 8.4 Documentation Tracker (view)

PDO_PGSQL:
PHP 8.4 Documentation Tracker (view)
PHP 8.4 Documentation Tracker (view)
PHP 8.4 Documentation Tracker (view)

[kamil-tekiela]

I propose that when we create PRs for new language changes, we link the commit/PR/RFC so that it's easier to verify the changes. Right now, I need to go on a research sidequest to understand what's changed.