Shopify App oAuth Error FIX, “Invalid Request! Request or redirect did not come from Shopify” PHP

I spent about 3 hours this morning trying to figure out what happened to my Shopify App. It is June 1st, 2016, which is sugnificant because now that I know what happened, apparently Shopify has changed how they want you to authenticate your App. They have dropped the SIGNATURE parameter and want you to authenticate using a hashed HMAC.

Here is how I fixed the problem… (This is in PHP by the way, not Ruby) Continue reading “Shopify App oAuth Error FIX, “Invalid Request! Request or redirect did not come from Shopify” PHP”