Use Stringable interface explicitly

[GromNaN]

The Stringable interface was added in PHP 8.0. It makes it explicit that the class implements the magic method __toString.

[Copilot]

Pull Request Overview

This pull request implements explicit Stringable interface usage across MongoDB PHP driver classes that implement the __toString magic method. This follows PHP 8.0 best practices by making the string conversion capability explicit through interface implementation.

• Adds explicit Stringable interface implementation to core classes (Client, Database, Collection) and model classes (IndexInput, IndexInfo)
• Updates Rector configuration to enable PHP 8.0 features and configure the StringableForToStringRector
• Fixes a minor bug in test code by adding missing separator parameter to implode()

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/Client.php	Adds Stringable interface implementation to Client class
src/Database.php	Adds Stringable interface implementation to Database class
src/Collection.php	Adds Stringable interface implementation to Collection class
src/Model/IndexInput.php	Adds Stringable interface implementation to IndexInput class
src/Model/IndexInfo.php	Adds Stringable interface implementation to IndexInfo class
rector.php	Updates Rector configuration to enable PHP 8.0 features and configure StringableForToStringRector
tests/Model/BSONIteratorTest.php	Fixes implode() call by adding missing separator parameter

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[jmikola]

implode() suggests this alternative syntax is still supported, provided the separator string is empty and named arguments aren't utilized. No objection here, but I'm curious what prompted this change. Was it tooling?

[GromNaN]

That's prompted by rector. I expect the alternative syntax could be deprecated one day.