Amazon MWS Products SignatureDoesNotMatch -

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When I run this code, I get a SignatureDoesNotMatch error. I am not getting the problem. I also comment on sort order to keep the order in natural order. Any help would be appreciated. array = $> $ params = array ('AWSAccessKeyId' = & gt; "********", 'Action' => "GetCompetitivePricingForASIN", 'Seller Id = & Gt; "********", 'Signature Version' = & gt; "2", 'Timestamp' = & gt; GMDT ("Ymd \ TH: i: s. \\ 0 \\ 0 \ \ '\ ",' Version '= & gt;" 2011-10-01 ",' signature method '= & gt;" HmacSHA256 ",' MarketplaceId '=>" ATVPDKIKX0DER ", 'Asynlist.1' => $ asin); $ Url_parts = array (); Forex currency (array_keys ($ params) as $ key $ url_parts [] = $ key "=" Str_replace ('% 7E', '~', crude nanode ($ params [$ key]); // type ($ url_parts); $ Url_string = implode ("& amp;", $ url_parts); $ String_to_sign = "get \ nmws.amazonservices.com \ n / product / 2011-10-01 \ n". $ URL_STRING; $ Sign = hash_armack ("sha256", $ string_to_sign, AWS_SECRET_ACCESS_KEY, TRUE); $ Sign = urlencode (base64_encode ($ sign)); $ Url = "https://mws.amazonservices.com/Orders/2011-10-01" '?' . $ Url_string "& Amp; sign =". $ Sign; $ Ch = curl_init (); Curl_setopt ($ CH, CURLOPT_SSL_VERIFYHOST, incorrect); Curl_setopt ($ CH, CURLOPT_SSL_VERIFYPEER, incorrect); Curl_setopt ($ ch, CURLOPT_URL, $ url); Curl_setopt ($ CH, CURLOPT_RETURNTRANSFER, 1); Curl_setopt ($ CH, CURLOPT_SSL_VERIFYHOST, 0); $ Response = curl_exec ($ ch); $ Xml = Simple XMLload_string ($ response); Echo $ xml- & gt; AsXML ();

The signature mismatch is a very common error as well as the exact fault detection For diffcult !! My personal suggestion would be to compare the request with the Amazon Scratchpad request. This has always helped my case and for the signing for the match, the alphabetical order for Paramax should be. Try your API request here: and click the Details tab to view your full request URL, signature, MD5 hash, etc.

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