How to import Amazon product descriptions, images, etc. with ASIN [Using AMAZON ASSOCIATES]

If you need to use Amazon ASSOCIATES affiliate program or import API information, you can use as follows.

- amazon.aff.php

<?php

class AmazonAPI {

    var $amazon_aff_id;

    var $amazon_access_key;

    var $amazon_secret_key;

    var $url_params;

    var $itemID;

    var $xml;

    var $operation;

    var $signature;

    //var $response_groups = "Small,Images,OfferSummary";

var $response_groups = "Large";

    var $error_message;

    var $error=0;

    

    public function __construct($affid, $access, $secret)

    {

        $this->amazon_aff_id = $affid;

        $this->amazon_access_key = $access;

        $this->amazon_secret_key = $secret;

    }

    public function build_url()

    {

        $url = "http://webservices.amazon.com/onca/xml?";

        $this->response_groups = str_replace(",", "%2C", $this->response_groups);

        $url_params = "AWSAccessKeyId=" . $this->amazon_access_key;

        $url_params .= "&AssociateTag=" . $this->amazon_aff_id;

        if(!empty($this->itemID)) {

            $url_params .= "&ItemId=" . $this->itemID;

        }

        $url_params .= "&Operation=" . $this->operation;

        $url_params .= "&ResponseGroup=" . $this->response_groups;

        $url_params .= "&Service=AWSECommerceService";

        $url_params .= "&Timestamp=" . rawurlencode(gmdate("Y-m-d\TH:i:s\Z"));

        $url_params .= "&Version=2013-08-01";

        $this->url_params = $url_params;

        $url .= $url_params;

        $url .= "&Signature=" . $this->generate_signature();

        return $url;

    }

    public function generate_signature()

    {

        $this->signature = base64_encode(hash_hmac("sha256",

            "GET\nwebservices.amazon.com\n/onca/xml\n" . $this->url_params,

            $this->amazon_secret_key, True));

        $this->signature = str_replace("+", "%2B", $this->signature);

        $this->signature = str_replace("=", "%3D", $this->signature);

        return $this->signature;

    }

    public function item_lookup($id)

    {

        $this->operation = "ItemLookup";

        $this->itemID = $id;

        $url = $this->build_url();

        $ch = curl_init();  

        curl_setopt($ch,CURLOPT_URL,$url);

        curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);

        $output = curl_exec($ch);

        curl_close($ch);

        $this->xml = simplexml_load_string($output);

        return $this;

    }

    public function check_for_errors()

    {

        if(isset($this->xml->Error)) {

            $this->error_message = $this->xml->Error->Message;

            $this->error = 1;

        }

        if(isset($this->xml->Items->Request->Errors)) {

            $this->error_message = $this->xml->Items->Request->Errors->Error->Message;

            $this->error = 1;

        }

        return $this->error;

    }

    public function get_item_price($product)

    {

        $price = 0;

        if(isset($product->LowestNewPrice)) {

            $price = $product->LowestNewPrice->FormattedPrice;

        } elseif(isset($product->LowestUsedPrice)) {

            $price = $product->LowestUsedPrice->Amount;

        } elseif(isset($product->LowestUsedPrice)) {

            $price = $product->LowestUsedPrice->Amount;

        } elseif(isset($product->LowestCollectiblePrice)) {

            $price = $product->LowestCollectiblePrice->Amount;

        } elseif(isset($product->LowestRefurbishedPrice)) {

            $price = $product->LowestRefurbishedPrice->Amount;

        }

        return $price;

    }

    public function get_item_data()

    {

        if($this->check_for_errors()) return null;

        $product = $this->xml->Items->Item;

print_r($product);

exit;

        $item = new STDclass;

        $item->detailedPageURL = $product->DetailPageURL;

        $item->link = "https://www.amazon.com/gp/product/".$this->itemID."/?tag=" . $this->amazon_aff_id;

        $item->title = $product->ItemAttributes->Title;

        $item->smallImage = $product->SmallImage->URL;

        $item->mediumImage = $product->MediumImage->URL;

        $item->largeImage = $product->LargeImage->URL;

        $item->Manufacturer = $product->ItemAttributes->Manufacturer;

        $item->ProductGroup = $product->ItemAttributes->ProductGroup;

        $item->Manufacturer = $product->ItemAttributes->Manufacturer;

        $item->price = $this->get_item_price($product->OfferSummary);

        return $item;

    }

}

?>

How to use

include_once('/amazon.aff.php');

$amazon = new AmazonAPI("STORE_ID (affiliate-program)", "MERCHANT_ID", "SECRET CODE");

$item = $amazon->item_lookup("ASIN")->get_item_data();