问亚马逊产品广告，是否有搜索类别的API？

EN

<?php

require_once 'aws_signed_request.php';

class AmazonProductAPI
{
/**
 * Your Amazon Access Key Id
 * @access private
 * @var string
 */
private $public_key     = "";

/**
 * Your Amazon Secret Access Key
 * @access private
 * @var string
 */
private $private_key    = "";

private $media_type     = "";

private $region         = "";

private $out_file_fp    = "";


public function __construct($public, $private, $region) {
    $this->public_key   = $public;
    $this->private_key  = $private;
    $this->region       = $region;
}        

public function getNode($node)
{
    $parameters = array("Operation"  => "BrowseNodeLookup",
                                        "BrowseNodeId"   => $node,
                                        "ResponseGroup" => "BrowseNodeInfo");

    $xml_response = aws_signed_request($parameters,
                                       $this->public_key,
                                       $this->private_key,
                                       $this->region);

    return ($xml_response);
}


public function setMedia($media, $file = "") {
    $media_type = array("display", "csv");

    if(!in_array($media,$media_type)) {
        throw new Exception("Invalid Media Type");
        exit();
    }

    $this->media_type = $media;

    if($media == "csv") {
        $this->out_file_fp = fopen($file,'a+');
    }
}


private function writeOut($level, $name, $id, $parent) {
    if($this->media_type == "display") {
        $spaces = str_repeat( ' ', ( $level * 6 ) );
        echo $spaces . $parent . ' : ' . $name . ' : ' . $id . "\n";   
    } elseif ($this->media_type == "csv") {
        $csv_line = '"' . $parent . '","' . $name . '","' . $id . '"' . "\n";
        fputs($this->out_file_fp, $csv_line);
    } else {
        throw new Exception("Invalid Media Type");
        exit();
    }
}


public function getBrowseNodes($nodeValue, $level = 0)
{
    try {
        $result = $this->getNode($nodeValue);
    }
    catch(Exception $e) {
        echo $e->getMessage();
    }

    if(!isset($result->BrowseNodes->BrowseNode->Children->BrowseNode)) return;

    if(count($result->BrowseNodes->BrowseNode->Children->BrowseNode) > 0) {
        foreach($result->BrowseNodes->BrowseNode->Children->BrowseNode as $node) {
            $this->writeOut($level, $node->Name,
                            $node->BrowseNodeId,
                            $result->BrowseNodes->BrowseNode->Name);

            $this->getBrowseNodes($node->BrowseNodeId, $level+1);
        }
    } else {
        return;        
    }
}


public function getNodeName($nodeValue)
{
    try {
        $result = $this->getNode($nodeValue);
    }
    catch(Exception $e) {
        echo $e->getMessage();
    }

    if(!isset($result->BrowseNodes->BrowseNode->Name)) return;

    return (string)$result->BrowseNodes->BrowseNode->Name;
}


public function getParentNode($nodeValue)
{
    try {
        $result = $this->getNode($nodeValue);
    }
    catch(Exception $e) {
        echo $e->getMessage();
    }

    if(!isset($result->BrowseNodes->BrowseNode->Ancestors->BrowseNode->BrowseNodeId)) return;

    $parent_node = array("id" => (string)$result->BrowseNodes->BrowseNode->Ancestors->BrowseNode->BrowseNodeId,
                         "name" => (string)$result->BrowseNodes->BrowseNode->Ancestors->BrowseNode->Name);
    return $parent_node;
}}?>

<?php


function  aws_signed_request($params,$public_key,$private_key,$region)   
{

$method = "GET";
$host = "ecs.amazonaws.".$region; // must be in small case
$uri = "/onca/xml";


$params["Service"]          = "AWSECommerceService";
$params["AWSAccessKeyId"]   = $public_key;
$params["AssociateTag"]     = 'YOUR-ASSOCIATES-ID-HERE';
$params["Timestamp"]        = gmdate("Y-m-d\TH:i:s\Z");
$params["Version"]          = "2009-03-31";

/* The params need to be sorted by the key, as Amazon does this at
  their end and then generates the hash of the same. If the params
  are not in order then the generated hash will be different thus
  failing the authetication process.
*/
ksort($params);

$canonicalized_query = array();

foreach ($params as $param=>$value)
{
    $param = str_replace("%7E", "~", rawurlencode($param));
    $value = str_replace("%7E", "~", rawurlencode($value));
    $canonicalized_query[] = $param."=".$value;
}

$canonicalized_query = implode("&", $canonicalized_query);

$string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;

/* calculate the signature using HMAC with SHA256 and base64-encoding.
   The 'hash_hmac' function is only available from PHP 5 >= 5.1.2.
*/
$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));

/* encode the signature for the request */
$signature = str_replace("%7E", "~", rawurlencode($signature));

/* create request */
$request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;

/* I prefer using CURL */
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$request);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 15);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

$xml_response = curl_exec($ch);

if ($xml_response === False)
{
    return False;
}
else
{
    /* parse XML */
    $parsed_xml = @simplexml_load_string($xml_response);
    return ($parsed_xml === False) ? False : $parsed_xml;
}
}
?>

<?php

/* Example usage of the Amazon Product Advertising API */ 
include("amazon_api_class.php");

$public_key     = "YOUR-AMAZON-PUBLIC-KEY";
$private_key    = "YOUR-AMAZON-SECRET-KEY";
$region         = "com"; // or "CA" or "DE" etc.

$obj = new AmazonProductAPI($public_key, $private_key, $region); 
$obj->setMedia("display");
$obj->getBrowseNodes("1036592"); //Apparel US store

?>