TalkPHP - Amazon web services help

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Amazon web services help

Hi, i'm new to this forum but hope you guys can help me out. I'm trying to get some book information from an ISBN number but i cant get any results to print out. The $request has values and so does the $data array but i cant output any of the information...

Here is what ive got so far:

PHP Code:


		
			
<? 

$AWSAccessKeyId = "MY_CODE_HERE";

$AssociateTag =  "";

$Version =  "";

$Operation =  "ItemLookup";

$SearchIndex = "Books";

// ItemID: is a test ISBN number

$ItemId =  "1843151022";

$ResponseGroup = "Medium";



$request= file_get_contents("http://ecs.amazonaws.com/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=$AWSAccessKeyId&AssociateTag=$AssociateTag&Version=$Version&Operation=$Operation&ItemId=$ItemId&ResponseGroup=$ResponseGroup"); 



include('xml.php'); 

$data = XML_unserialize($request); 



$error = $data[ItemLookupResponse][Items][Request][Errors][Error][Message]; 

$theAuthor = $data[ItemLookupResponse][Items][Item][0][ItemAttributes][Author]; 

$theLabel = $data[ItemLookupResponse][Items][Item][0][ItemAttributes][Label]; 

$theBinding = $data[ItemLookupResponse][Items][Item][0][ItemAttributes][Binding]; 



if (!$error) { 

    print (' 

    Author: '.$theAuthor.'<br />

    Label: '.$theLabel.'<br /> 

    Binding: '.$theBinding.''); 

} 

else

{

    die($error);

} 

?>

If anyone could help me get the correct results to display that would be great, thanks guys!

Hi oMIKEo, welcome to TalkPHP :-)

The problem with your code looks to be when you are trying to get the values from your $data array.

Your Amazon request only returns a single item so there is no need to specify [0] when accessing the item attributes.

For example, changing that block of your code to:

PHP Code:


		
			
$error = $data['ItemLookupResponse']['Items']['Request']['Errors']['Error']['Message'];  

$theAuthor = $data['ItemLookupResponse']['Items']['Item']['ItemAttributes']['Author'];  

$theLabel = $data['ItemLookupResponse']['Items']['Item']['ItemAttributes']['Label'];  

$theBinding = $data['ItemLookupResponse']['Items']['Item']['ItemAttributes']['Binding'];

Will result in the following:

Code:

Author: Louis Fidge

Label: Letts Educational

Binding: Paperback

Hope that helps :-)

Thanks for the fast reply Alan,

That works a treat, I knew I wasn't too far off :)

I'm having a problem with this code now on another machine, im running it locally using the same code but now its not working and i get the following error:

Quote:

Warning: file_get_contents(http://ecs.amazonaws.com/onca/xml?Se...seGroup=Medium) [function.file-get-contents]: failed to open stream: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. in C:\Inetpub\wwwroot\Library\lookup.php on line 52

Fatal error: Maximum execution time of 30 seconds exceeded in C:\Inetpub\wwwroot\Library\lookup.php on line 52

Any ideas why this wouldnt work on another computer?
can your internet connection cause this error?

file_get_contents is certainly not allowed from local to internet.
Download the xml file, put it in your local folder and try again, changing the url passed to your file_get_contents function.

If a such access could be possible, it would be too easy to hack a website ;)

file_get_contents() does support opening of remote files from the local machine - I use it here on my local laptop all the time - just need to make sure that the fopen wrappers are enabled :-)

Mike: Are you able to try using file_get_contents() to open another website/url from the new machine? It looks to me like a firewall or somthing may be blocking it, or perhaps Amazon was just down or on a go slow when you tested it?

Alan

Aside from your data retrieval problems

PHP Code:


		
			
$data['ItemLookupResponse']['Items']['Request']['Errors']['Error']['Message'];

Is a faster alternative to

PHP Code:


		
			
$data[ItemLookupResponse][Items][Request][Errors][Error][Message];