Fix PHP SDK fatal and validate template builds

[ChiragAgg5k]

What does this PR do?

• updates the PHP starter from appwrite/appwrite 17.4.1 to 18.0.1 and refreshes its lockfile
• adds build checks for every template runtime on pull requests and a weekly schedule
• explicitly loads classes imported by PHP templates so dependency parse-time fatals are caught before deployment
• fixes missing path separators in the PHP email contact form entrypoint discovered by the runtime check

Why?

PHP SDK 17.4.1 contains method aliases that differ only by case. PHP method names are case-insensitive, so loading Appwrite\\Services\\Users crashes with a redeclaration fatal. Composer installation and php -l do not load imported classes, so they do not detect this failure.

Validation

• installed, linted, and runtime-loaded all PHP templates
• confirmed the runtime check fails against SDK 17.4.1 with the expected Users::updateMFA() redeclaration fatal
• confirmed the PHP starter passes with SDK 18.0.1
• ran actionlint .github/workflows/build.yml
• ran php -l .github/scripts/load-composer-classes.php
• ran git diff --check

[greptile-apps]

Greptile Summary

The PR upgrades the PHP starter SDK and adds CI validation intended to catch dependency-loading and template build failures before deployment.

• Adds build checks for the repository’s supported template runtimes.
• Loads imported PHP symbols and entrypoints during validation.
• Corrects the email contact form’s local include paths.
• Refreshes PHP and Rust dependency lockfiles.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
.github/scripts/load-composer-classes.php	Adds runtime loading of imported Composer symbols and now correctly expands grouped and comma-separated imports.
.github/workflows/build.yml	Adds scheduled and pull-request build validation across template runtimes.
php/email-contact-form/src/index.php	Corrects missing separators in local utility and CORS include paths.
php/starter/composer.json	Upgrades the Appwrite PHP SDK constraint to a version without the reported class-loading fatal.
php/starter/composer.lock	Locks the PHP starter to Appwrite SDK 18.0.1 consistently with the manifest.
rust/starter/Cargo.lock	Refreshes transitive h2 and windows-sys resolution without introducing a review-eligible failure.

_{Reviews (2): Last reviewed commit: "fix: address build and import validation..." | Re-trigger Greptile}