How to get Serverless PHP uploaded file

In PHP, when used with web servers, the $_FILES variable is filled in with info about the file specified in the web form and saved on the disk by the web server. With our FaaS product Functions, things work differently. Instead of the variables $_FILES, $_GET, and $_POST, we make as much data about the request as we can available to you by including it in the “event” parameter of your function.

Unrelated to your use case, but related to the function signature, is the fact that we also make as much data about the execution context as we can available to you by including it in the “context” parameter of your function.

So in the end, a full featured PHP function signature is as follows:

<?php

function main(array $event, object $context): array
{
    $name = $args["name"] ?? "stranger";
    $greeting = "Hello $name!";
    echo $greeting;
    return [
        "body" => [
            "event" => $event,
            "context" => $context,
        ],
    ];
}

This example returns the complete event parameter and context parameter in the response body. This helps you see all the data that is available to you while you process the request.

For your use case, try using an HTTP client, such as the web browser you described in your question, or curl, to send a request where you’d normally see file data in $_FILES if it were PHP used with a web server. You’ll see how our system processes this and makes it available in the event parameter.