DOSCP-61807: PHP Getting Started

[tmcneil-mdb]

Summary | JIRA

Adds the PHP Get Started sample application under php/hello-world, mirroring the existing java/hello-world, java-rs/hello-world, kotlin-coroutine/hello-world, and kotlin-sync/hello-world samples. The app connects to a MongoDB deployment using the connection string in the MONGODB_URI environment variable, seeds a few sample product documents into the get_started.products collection, then queries and prints one of them.

Changes

• php/hello-world/src/HelloWorld.php — sample application
• php/hello-world/composer.json — dependencies (mongodb/mongodb ^2.0, ext-mongodb ^2.0, PHP >=8.2)
• php/hello-world/README.md — setup and run instructions
• php/hello-world/.gitignore — ignores vendor/ and composer.lock
• Added the PHP entry to the root README
• Verified on PHP 8.5.2: (End-to-end run against a live deployment)

Notes for Reviewer:

1. Version note: targeting PHP 8.2, not 7.4

The current PHP library Get Started docs state a minimum of PHP 7.4, but this sample targets PHP 8.2 or later. Two reasons:

• PHP 7.4 is end-of-life (since Nov 2022) and is no longer available from Homebrew core — installing it now requires a third-party link
• The docs page is already internally inconsistent on this. Its own install step, pie install mongodb/mongodb-extension, installs ext-mongodb 2.x, and both the 2.x extension and the mongodb/mongodb 2.x library require PHP 8.1+. So "PHP 7.4" doesn't actually work with the steps the page tells you to run.

2. README assumes a Unix/Linux shell.