There are several situation where we need to accept xml as input in php file which is sent by other scripts like flash/php/perl etc.
To accept xml as input in php, first you need to check that content-type which is being passed by source script has to be in "text/xml" format.
Now in your PHP script you can accept xml input by the following code.
$xml_str=file_get_contents("php://input");
//where $xml_str will have xml string passed by the source script.
