Shopify API should be built in!

In the meantime, what would the connection credentials be? Their oAuth docs are here: http://docs.shopify.com/api/authentication/oauth

Yes, I try to add Shopify support soon. I will follow up here when it is done.

Where do you see connection credentials? Could it be client credentials?

I am trying to setup the properties manually. Right now I have it setup as:

$client = new oauth_client_class();
$client->debug = true;
$client->debug_http = true;
$client->server = 'Shopify';
$client->client_id = $GLOBALS['env']->shopify_key;
$client->client_secret = $GLOBALS['env']->shopify_secret;
$client->configuration_file = '../vendor/phpclasses/oauth-api/oauth_configuration.json';
$client->server = 'Shopify';
$client->redirect_uri = 'https://nyclips.abovemarket.com/install';
$client->oauth_version = '2.0';
$client->dialog_url = 'https://nyclips-2.myshopify.com/admin/oauth/authorize?client_id={CLIENT_ID}&scope={SCOPE}&redirect_uri={REDIRECT_URI}&state={STATE}';
$client->access_token_url = 'https://nyclips-2.myshopify.com/admin/oauth/access_token';

However, when I run this code, Safari says, "Can't Open the Page - Too many redirects occurred trying to open https://nyclips.abovemarket.com/install?code=" Pic of error here: https://www.dropbox.com/s/jp52lzy30j8mf3k/Failed%20to%20open%20page.png?dl=0

Am I missing a key configuration parameter?

That may be a sign that PHP sessions may not be working well in your environment.

By default the class stores token state data in session variables. If session data is not being recorded, when Shopify redirects back to your site, it will start over thinking that the token state was never initialized.

Sometimes it is a matter of permissions on your Web server to access the directories where session data is stored.

Thank you for your reply. I will look into this further.