Dump XML Posts from 'php://input' to file - php

Question

I'm trying to write a parser for a xml postback listener, but can't seem to get it to dump the xml for a sample. The API support guy told me to use 'DOMDocument', maybe 'SimpleXML'? Anyways here's the code: (thanks!)
<?php
$xml_document = file_get_contents('php://input');
$doc = new DOMDocument();
$doc->loadXML($xml_document);
$doc->save("test2/".time().".sample.xml").".xml");
?>

Answer 1

How about use this to create an XML file?
/**
* Will output in a similar form to print_r, but the nodes are xml so can be collapsed in browsers
*
* #param mixed $mixed
*/
function print_r_xml($mixed)
{
// capture the output of print_r
$out = print_r($mixed, true);
// Replace the root item with a struct
// MATCH : '<start>element<newline> ('
$root_pattern = '/[ \t]*([a-z0-9 \t_]+)\n[ \t]*\(/i';
$root_replace_pattern = '<struct name="root" type="\\1">';
$out = preg_replace($root_pattern, $root_replace_pattern, $out, 1);
// Replace array and object items structs
// MATCH : '[element] => <newline> ('
$struct_pattern = '/[ \t]*\[([^\]]+)\][ \t]*\=\>[ \t]*([a-z0-9 \t_]+)\n[ \t]*\(/miU';
$struct_replace_pattern = '<struct name="\\1" type="\\2">';
$out = preg_replace($struct_pattern, $struct_replace_pattern, $out);
// replace ')' on its own on a new line (surrounded by whitespace is ok) with '</var>
$out = preg_replace('/^\s*\)\s*$/m', '</struct>', $out);
// Replace simple key=>values with vars
// MATCH : '[element] => value<newline>'
$var_pattern = '/[ \t]*\[([^\]]+)\][ \t]*\=\>[ \t]*([a-z0-9 \t_\S]+)/i';
$var_replace_pattern = '<var name="\\1">\\2</var>';
$out = preg_replace($var_pattern, $var_replace_pattern, $out);
$out = trim($out);
$out='<?xml version="1.0"?><data>'.$out.'</data>';
return $out;
}
Im my application I posted all of the $_POST variables to it:
$handle = fopen("data.xml", "w+");
$content = print_r_xml($_POST);
fwrite($handle,$content);
fclose();