Parsing XML with the built-in PHP XML parser can be tricky. But once you see how it’s done, you’ll be parsing Amazon XML in no time.
Using someone else’s wrapper functions to handle Amazon Web Services requests is a nice shortcut to building applications. But the time inevitably comes when you want to do something that existing wrappers don’t handle. You can either look under the hood and tinker with or add to someone else’s work, or you can build your own scripts from scratch.
The following bit of PHP might be a good start if you’re building
something from the ground up. It uses PHP’s built-in XML parser to
handle AWS responses, so there’s nothing new to install. PHP’s parser
is James Clark’s
expat, and you can find the
documentation at http://www.php.net/xml.
Given an ASIN, this example requests the
response and formats the results in an HTML table.
This code builds an
AsinSearch Amazon request URL
asin value passed in through the
querystring, and retrieves the XML with the
fopen( ) function.
xml_parse_into_struct function turns the AWS
response into two arrays—one with tag names
$index) and the other with values
$values). Looping through the array, the script
then sets the value when it finds the XML tag it’s looking for. With
the values set, it prints the HTML to the page with the values in
place. Create a file called ASINsearch.php
containing the following code:
<?php // Set Local variables $dev_token = "
insert developer ...