Yama's Memorandum

<?php
SetBookByAmazon($BookId,$BookCode ) {
     require_once("./Book.php");
     require_once("./Author.php");
     define('KEYID','Your Key-ID placed here');
     define('AssocTag','Your Associate-Tag placed here');
     $aws_host = "ecs.amazonaws.jp";
     $request = ''Service=AWSECommerceService'
     . '&AWSAccessKeyId='.KEYID.'&Operation=ItemLookup'
     . '&ResponseGroup=Large&Version=2008-08-19';
    $request    .= '&IdType=' . $BookCode . '&ItemId=' . $BookId;
    $request    .= "&Timestamp=" . str_replace('GMT','T',gmdate("Y-m-dTH:i:s")) . "Z";
    $request    = canonical_Str( $request );
    $signature = get_Signature( $request, $aws_host );
    $request = "http://" . $aws_host . "/onca/xml?" . $request . "&Signature=" . $signature;
    $response   = file_get_contents($request);
    $parsed_xml = simplexml_load_string($response);
// Get AWS 判定

    if( $IsValid != 'True' ) return -1;
//
    $Item       = $parsed_xml->Items->Item;
// Get Image URL
    $Image_URL  = $Item->MediumImage->URL;
// Get ASIN
    $ASIN       = $Item->ASIN;
// Get Book_Data
    $Attributes = $Item->ItemAttributes;
       $Binding      = $Attributes->Binding;
       $EAN          = $Attributes->EAN;
       $ISBN         = $Attributes->ISBN;
       $Pub_Date     = $Attributes->PublicationDate;
       $Price        = $Attributes->ListPrice->Amount;
       $Currency_cd  = $Attributes->ListPrice->CurrencyCode;
       $Publisher    = $Attributes->Publisher;
       $Title        = $Attributes->Title;
       $Pages        = $Attributes->NumberOfPages;
       if      ( strlen($Pub_Date) == 7 ) $Pub_Date=$Pub_Date . '-00';
       else if ( strlen($Pub_Date) == 4 ) $Pub_Date=$Pub_Date . '-00-00';
       else if ( strlen($Pub_Date) < 4  ) $Pub_Date='0000-00-00';

       $book = new Book();
       $book->setIsbn($ISBN);
       $book->setAsin($ASIN);
       $book->setEan($EAN);
       $book->setTitle($Title);
       $book->setImage_url($Image_URL);
       $book->setPubdate($Pub_Date);
       $book->setPrice($Price);
       $book->setPages($Pages);
       $book->setPublisher($Publisher);
       $book->setBinding($Binding);
       $book->setCurrency_cd($Currency_cd);
       $book->setPosition($BookId);

    $author_name = array();
    $ncr = 0;
    foreach( $Attributes->Author as $Author_name ) {
       $author_name[$ncr] = $Author_name;
     //   echo "author = " . $author . "\n";
       $ncr = $ncr + 1;
    }
    foreach( $Attributes->Creator as $Creator ) {
       $author_name[$ncr] = $Creator;
       $ncr = $ncr + 1;
    }

    $author_array = array();
    for ( $i=0; $i<sizeof($author_name); $i++ ) {
       $author->setAuthor($author_name[$i]);
       $author->setRole($author_name[$i]['Role']);
       $author_array[] = $author;
    }

    $return_arguments = array();
       $return_arguments[] = $book;
       $return_arguments[] = $author_array;

    return $return_arguments;
}

function canonical_Str( $request ) {
   $req_split = array();
   $req_split = split("&", $request);
   for( $i=0; $i