Invoking FunctionGraph Functions¶

Following pages demonstrate how to call a FunctionGraph implemented in PHP:

For details on function invocation, see

Function Invocation

in FunctionGraph API reference.

Prerequisites¶

Environment Variables¶

Following environment variables need to be set:

Environment Variables¶
Name	Description
OTC_SDK_PROJECTID	Project ID
OTC_SDK_REGION	Region, e.g. “eu-de”
OTC_SDK_AK	Access Key (*)
OTC_SDK_SK	Secret Key
OTC_USER_NAME	User name (*)
OTC_USER_PASSWORD	User password
OTC_DOMAIN_NAME	Domain name
OTC_IAM_ENDPOINT	IAM Endpoint, e.g. https://iam.eu-de.otc.t-systems.com/v3

(* User needs to have permission to invoke FunctionGraph)

Deployed FunctionGraph Event Function¶

Use following settings to create the FunctionGraph event function using the FunctionGraph console:

Project : as specified in the environment variable OTC_SDK_PROJECTID
Region: as specified in the environment variable OTC_SDK_REGION
Name: php-sample-invoke-function
Runtime: PHP 8.3
Version: latest
Application: default

Function code: Use the following sample code for the function code.

samples-doc/invoke-fg/src-fg/index.php¶

<?php

function handler($event, $context) {
    $logger = $context->getLogger();
    $logger->info("Function name: " . $context->getFunctionName());

    return [
        "statusCode" => 200,
        "isBase64Encoded" => false,
        "body" => json_encode($event),
        "headers" => [
            "Content-Type" => "application/json"
        ]
    ];
}

Handler name: index.handler

Permissions¶

Make sure that your user has the necessary permissions to invoke the function.

last updated: 2026-09-22 12:15:14 UTC - commit: d206a39d29fa768880e8772002f6efdaa7bba431