digitalocean php serverless function hardcoded local simulation & composer base config incl mongodb

composer.json

{
    "config": {
        "platform": {
            "php": "8.0.28",
            "ext-mongodb": "1.9.0RC1"
        }
    },
    "require": {
        "mongodb/mongodb": "^1.4",
    },
    "require-dev": {
        "phpunit/phpunit": "^9.6"
    }
}

dosim.php

<?php

function getallheader(){$headers = getallheaders();foreach($headers as $key=>$value){unset($headers[$key]);$headers[strtolower($key)]=$value;}ksort($headers);return $headers;}

$_SERVER['REQUEST_METHOD'] = $_SERVER['REQUEST_METHOD'] ?? 'GET';

$data = [
	'__ow_headers' => getallheader(),
	'__ow_method'  => strtolower( $_SERVER['REQUEST_METHOD'] ),
	'__ow_path'    => ''
];

$data['http'] = [
	'headers' => $data['__ow_headers'],
	'method'  => strtoupper( $data['__ow_method'] ),
	'path'    => $data['__ow_path']
];

if( count( $_GET ) > 0 ) {
	$data['__ow_query'] = $data['http']['queryString'] = http_build_query( $_GET );
}

if( $_SERVER['REQUEST_METHOD'] === 'POST' ) {
	if( strpos( $data['http']['headers']['content-type'], 'x-www-form-urlencoded' ) !== false ) {
		$data['__ow_body'] = $data['http']['body'] = http_build_query( $_POST );
		$data['__ow_isBase64Encoded'] = $data['http']['isBase64Encoded'] = false;
	}
	else if( strpos( $data['http']['headers']['content-type'], 'multipart/form-data' ) !== false ) {
		$data['__ow_body'] = $data['http']['body'] = base64_encode( file_get_contents('php://input') );
		$data['__ow_isBase64Encoded'] = $data['http']['isBase64Encoded'] = true;
	}
}

require_once('index.php');

die( json_encode( main( $data )['body'] ) );