PHP: $_POST array to XML file and display results - php

Question

I'm creating a "Madlibs" page where visitors can create funny story things online. The original files are in XML format with the blanks enclosed in XML tags
(Such as blablabla <PluralNoun></PluralNoun> blablabla <Verb></Verb> ).
The form data is created using XSL and the results are saved using a $_POST array. How do I post the $_POST array between the matching XML tags and then display the result to the page? I'm sure it uses a "foreach" statement, but I'm just not familiar enough with PHP to figure out what functions to use. Any help would be great.
Thanks,
E

Answer 1

I'm not sure if I understood your problem quite well, but I think this might help:
// mocking some $_POST variables
$_POST['Verb'] = 'spam';
$_POST['PluralNoun'] = 'eggs';
// original template with blanks (should be loaded from a valid XML file)
$xml = 'blablabla <PluralNoun></PluralNoun> blablabla <Verb></Verb>';
$valid_xml = '<?xml version="1.0"?><xml>' . $xml . '</xml>';
$doc = DOMDocument::loadXML($valid_xml, LIBXML_NOERROR);
if ($doc !== FALSE) {
$text = ''; // used to accumulate output while walking XML tree
foreach ($doc->documentElement->childNodes as $child) {
if ($child->nodeType == XML_TEXT_NODE) { // keep text nodes
$text .= $child->wholeText;
} else if (array_key_exists($child->tagName, $_POST)) {
// replace nodes whose tag matches a POST variable
$text .= $_POST[$child->tagName];
} else { // keep other nodes
$text .= $doc->saveXML($child);
}
}
echo $text . "\n";
} else {
echo "Failed to parse XML\n";
}

Answer 2

Here is PHP foreach syntax. Hope it helps
$arr = array('fruit1' => 'apple', 'fruit2' => 'orange');
foreach ($arr as $key => $val) {
echo "$key = $val\n";
}
and here is the code to loop thru your $_POST variables:
foreach ($_POST as $key => $val) {
echo "$key = $val\n";
// then you can fill each POST var to your XML
// maybe you want to use PHP str_replace function too
}