QCdmzadQ

1<?php
2
3class AmazonAPI {
4
5    var $amazon_aff_id;
6    var $amazon_access_key;
7    var $amazon_secret_key;
8
9    var $url_params;
10    var $itemID;
11    var $xml;
12
13    var $operation;
14    var $signature;
15    var $response_groups = "Small,Images,OfferSummary";
16
17    var $error_message;
18    var $error=0;
19    
20
21    public function __construct($affid, $access, $secret)
22    {
23        $this->amazon_aff_id = $affid;
24        $this->amazon_access_key = $access;
25        $this->amazon_secret_key = $secret;
26    }
27
28    public function build_url()
29    {
30        $url = "https://webservices.amazon.de/onca/xml?";
31
32        $this->response_groups = str_replace(",", "%2C", $this->response_groups);
33
34        $url_params = "AWSAccessKeyId=" . $this->amazon_access_key;
35        $url_params .= "&AssociateTag=" . $this->amazon_aff_id;
36
37        if(!empty($this->itemID)) {
38            $url_params .= "&ItemId=" . $this->itemID;
39        }
40
41        $url_params .= "&Operation=" . $this->operation;
42        $url_params .= "&ResponseGroup=" . $this->response_groups;
43        $url_params .= "&Service=AWSECommerceService";
44        $url_params .= "&Timestamp=" . rawurlencode(gmdate("Y-m-d\TH:i:s\Z"));
45        $url_params .= "&Version=2013-08-01";
46
47        $this->url_params = $url_params;
48
49        $url .= $url_params;
50        $url .= "&Signature=" . $this->generate_signature();
51
52        return $url;
53    }
54
55    public function generate_signature()
56    {
57        $this->signature = base64_encode(hash_hmac("sha256",
58            "GET\nwebservices.amazon.de\n/onca/xml\n" . $this->url_params,
59            $this->amazon_secret_key, True));
60        $this->signature = str_replace("+", "%2B", $this->signature);
61        $this->signature = str_replace("=", "%3D", $this->signature);
62        return $this->signature;
63    }
64
65    public function item_lookup($id)
66    {
67        $this->operation = "ItemLookup";
68        $this->itemID = $id;
69
70        $url = $this->build_url();
71
72        $ch = curl_init();  
73
74        curl_setopt($ch,CURLOPT_URL,$url);
75        curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
76
77        $output = curl_exec($ch);
78
79        curl_close($ch);
80
81        $this->xml = simplexml_load_string($output);
82        return $this;
83    }
84
85    public function check_for_errors()
86    {
87        if(isset($this->xml->Error)) {
88            $this->error_message = $this->xml->Error->Message;
89            $this->error = 1;
90        }
91        if(isset($this->xml->Items->Request->Errors)) {
92            $this->error_message = $this->xml->Items->Request->Errors->Error->Message;
93            $this->error = 1;
94        }
95        return $this->error;
96    }
97
98    public function get_item_price($product)
99    {
100        $price = 0;
101        if(isset($product->LowestNewPrice)) {
102            $price = $product->LowestNewPrice->Amount;
103        } elseif(isset($product->LowestUsedPrice)) {
104            $price = $product->LowestUsedPrice->Amount;
105        } elseif(isset($product->LowestCollectiblePrice)) {
106            $price = $product->LowestCollectiblePrice->Amount;
107        } elseif(isset($product->LowestRefurbishedPrice)) {
108            $price = $product->LowestRefurbishedPrice->Amount;
109        }
110        return $price;
111    }
112
113    public function get_item_data()
114    {
115        if($this->check_for_errors()) echo "null";
116
117        $product = $this->xml->Items->Item;
118        $item = new STDclass;
119        $item->detailedPageURL = $product->DetailPageURL;
120        $item->link = "https://www.amazon.de/gp/product/".$this->itemID."/?tag=" . $this->amazon_aff_id;
121        $item->title = $product->ItemAttributes->Title;
122        $item->smallImage = $product->SmallImage->URL;
123        $item->mediumImage = $product->MediumImage->URL;
124        $item->largeImage = $product->LargeImage->URL;
125
126        $item->price = $this->get_item_price($product->OfferSummary);
127
128        return $item;
129    }
130
131}
132
133
134
135
136
137
138
139$amazon = new AmazonAPI("associate-id", "access-key", "secret-key");
140$item = $amazon->item_lookup("ASIN")->get_item_data();
141
142echo $item->title;
143
144?>