Failed to load resource: the server responded with stats of 405 (method not allowed)

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PHP

I am currently getting this error: :60018/server.php Failed to load resource: the server responded with a status of 405 (Method Not Allowed)

I am not very familiar with php code as this is code a friend wrote a while ago for a project we worked on, and I wanted to work on that project on my own a bit and make it better. But I am unsure what is making this happen, I have tried looking up stuff about it but I honestly haven't used any php before. The code is below, any help and ideas would be appreciated. And in case it matters, I am running this project on Visual Studios 2015

$ids = buildFinalList();
echo json_encode($ids);

function buildFinalList() {
    $conn = dbConnect();
    $type = 'themoviedb';
    $input = json_decode(file_get_contents('php://input'), true);
    $genre = $input['genres'];
    $sources = $input['sources'];
    $page = 1;

    $result = array();

    while (count($result) <= 2) {

        $currentPage = generateList($genre, $page++);
        $idChecked = idCheck($conn, $currentPage, $type);
        $sourceChecked = sourceCheck($conn, $idChecked, $sources);
        $result = calcRating($sourceChecked, $result);
    }

    $conn->close();

    $filmIDs = array();

    foreach ($result as $key => $value) {
        array_push($filmIDs, $key);
    }

    return $filmIDs;
}

function generateList($genreID, $pageNum) {
    $usURL = "http://api.themoviedb.org/3/discover/movie?";
    $apiKey = "api_key=9372ef92347b5703a397967af35f6c1c";
    $genre = "&with_genres=" . $genreID;
    $page = "&page=" . $pageNum;
    $votes = "&vote_count.gte=50";
    $endURL = "&sort_by=vote_average.desc";
    $data1 = json_decode(file_get_contents($usURL.$apiKey.$genre.$page.$votes.$endURL), true);
    $data2 = $data1['results'];
    $ids = array();
    foreach ($data2 as $result) {
        array_push($ids, $result['id']);
    }
    return $ids;
}

function dbConnect() {
    $conn = new mysqli("localhost", "root", "", "movies");
    if ($conn->connect_error) {
        exit("Server connection error");
    }
    return $conn;
}

function idCheck($conn, $ids, $type) {

    $results = array();

    foreach ($ids as $id) {
        //database check
        $query = "SELECT * FROM `filmids` WHERE ".$type."=\"".$id."\"";
        $result = $conn->query($query);

        if ($result->num_rows == 0) {
            $guideCall = json_decode(file_get_contents
            ('http://api-public.guidebox.com/v1.43/US/rKs3n3vENgt7CQC6D2W8y8tQYtrVoaAx/search/movie/id/'
                .$type.'/'.$id), true);

            if (empty($guideCall) || empty($guideCall['imdb'])){
                continue;
            } else {
                $in = "INSERT INTO `filmids` (`imdb`, `themoviedb`, `guide`) VALUES (\""
                    .$guideCall["imdb"]."\", \"".$guideCall["themoviedb"]."\", \""
                    .$guideCall["id"]."\")";
                $conn->query($in);
                $out = "SELECT * FROM `filmids` WHERE ".$type."=\"".$id."\"";
                $result = $conn->query($out);
                array_push($results, $result->fetch_assoc());
            }
        } else {
            array_push($results, $result->fetch_assoc());
        }
    }

    return $results;
}

function sourceCheck($conn, $ids, $sources) {

    $validFilms = array();

    foreach ($ids as $film) {
        $query = "SELECT * FROM `sources` WHERE id=".$film['id'];
        $result = $conn->query($query);

        if ($result->num_rows == 0) {
            $addRow = "INSERT INTO `sources`(`id`) VALUE (".$film['id'].")";
            $conn->query($addRow);

            $guideCall = json_decode(file_get_contents
            ('http://api-public.guidebox.com/v1.43/US/rKs3n3vENgt7CQC6D2W8y8tQYtrVoaAx/movie/'
                . $film['guide']), true);

            $webSources = $guideCall['subscription_web_sources'];
            $trueSources = array();

            foreach ($webSources as $webSource) {
                array_push($trueSources, $webSource['source']);
            }

            foreach ($trueSources as $trueSource) {
                $query = "UPDATE `sources` SET `".$trueSource."` = \"".$trueSource."\" WHERE `id`=".$film['id'];
                $check = $conn->query($query);
                if ($check) {
                    continue;
                } else {
                    $conn->query("ALTER TABLE `sources` ADD `".$trueSource."` VARCHAR(255)");
                    $conn->query($query);
                }
            }

            if (count(array_diff($sources, $trueSources)) < count($sources)) {
                array_push($validFilms, $film);
            }

        } else {
            if (count(array_diff($sources, $result->fetch_assoc())) < count($sources)) {
                array_push($validFilms, $film);
            }
        }
    }
    return $validFilms;
}

function calcRating($films, $sorted) {

    foreach ($films as $film) {

        $OMDb = json_decode(file_get_contents("http://www.theimdbapi.org/api/movie?movie_id=".$film['imdb']), true);

        $rating = ($OMDb['rating']);

        $film['rating'] = $rating;

        $sorted[$film['imdb']] = $rating;

    }

    arsort($sorted);

    return $sorted;

}

What I have tried:

I have php and IIS installed and configured correctly, made sure the handlers had the POST method allowed like they should, added the .php MIME type in both the IIS manager and the applicationhost.config file