PHP Handler Template

Verified status as of March 28, 2026. Runtime note: FastFN auto-installs function-local dependencies from requirements.txt / package.json; host runtimes are required in fastfn dev --native, while fastfn dev depends on a running Docker daemon. Runtime internals: FastFN talks to php-daemon.php, which fans out to isolated php-worker.php child processes per handler path. That split is internal and keeps PHP handlers isolated from each other. PHP runtime is implemented. Use this template for handler.php.

php-handler.php

<?php

function handler(array $event): array {
    $query = $event['query'] ?? [];
    $name = $query['name'] ?? 'world';

    return [
        'status' => 200,
        'headers' => [
            'Content-Type' => 'application/json',
        ],
        'body' => json_encode([
            'runtime' => 'php',
            'hello' => $name,
        ]),
    ];
}

Contract

Defines expected request/response shape, configuration fields, and behavioral guarantees.

End-to-End Example

Use the examples in this page as canonical templates for implementation and testing.

Edge Cases

• Missing configuration fallbacks
• Route conflicts and precedence
• Runtime-specific nuances

See also

• Function Specification
• HTTP API Reference
• Run and Test Checklist

Last reviewed: March 28, 2026 · Docs on fastfn.dev