_includes/code/manifest-for-helloPhp-2.yaml

packages:
    default:
        actions:
            helloPHP:
                code: |
                    <?php
                    function main(array $args) : array
                    {
                        $name = $args["name"] ?? "stranger";
                        $greeting = "Hello $name!";
                        echo $greeting;
                        return ["greeting" => $greeting];
                    }
                runtime: php:7.3