Problems encountered following tutorial on Windows

[robinmalik]

Hi,

Thanks for your work on this tutorial. I thought a few additions to the readme.md might help others save a many hours of troubleshooting. These are the problems I encountered in order:

1. Curl was failing out of the box. Modifying the code to the following:

if(curl_errno($ch)){
    echo 'Curl error: ' . curl_error($ch);
}
else {
    $response = json_decode($response, true);
    if (array_key_exists("access_token", $response)) {
        return $response["access_token"];
    } else {
        //echo "Failed to retrieve access token";
        exit();
    }
}

showed the error SSL certificate problem: unable to get local issuer certificate. I had to download cacert.pem to store locally, and update curl.cainfo in php.ini to point to this path.

2. I kept getting invalid client credentials; after some googling, it appeared that if you have a + in the client secret key, it fails. Once I generated a key without that in, authentication worked, but then I hit another error: Application is not supported for this API version.

3. apps.dev.microsoft.com offers the ability to create two types of apps: "Converged" and "Azure AD Only". Having successfully worked with the Graph API using PowerShell and an application created in portal.azure.com (which displays under 'Azure AD Only' on apps.dev.microsoft.com) I had assumed this would also work - it did not. It seems then, that the type of application required is of type 'Converged'.

4. The apps.dev.microsoft.com portal did not appear to allow the specification of a reply URL during the creation process. I had to create the application first and then edit the application manifest file to put "http://localhost" into the replyUrls section.

[robinmalik]

My mistake on part 4. I had not added the platform of type 'web' the first time around; if you do that, you do indeed get the redirect URI.