PHP DOM Text Replace - php

Question

I need a little help in dynamically doing PHP DOM text replacement. In my research, I found a snippet of PHP DOM code that looks promising, but the writer provides no method as to how it works. The link to the code is: http://be2.php.net/manual/en/class.domtext.php
So for, here's what I did in approaching the code as a newbie to DOM.
$doc = new DOMDocument();
$doc->preserveWhiteSpace = false;
$doc->loadXML($myXmlString);
$search = 'FirstName lastname';
$replace = 'Jack Daniels';
$newTxt = domTextReplace( $search, $replace, DOMNode &$doc, $isRegEx = false );
Print_r($newTxt);
I would like the domTextReplace() return $newTxt. How can I get it to do so?

Answer 1

Here you have a working example to use that function:
<?php
$myXmlString = '<root><name>FirstName lastname</name></root>';
$doc = new DOMDocument();
$doc->preserveWhiteSpace = false;
$doc->loadXML($myXmlString);
$search = 'FirstName lastname';
$replace = 'Jack Daniels';
// The function doesn't return any value
domTextReplace($search, $replace, $doc, $isRegEx = false);
// Now the text is replaced in $doc
$xmlOutput = $doc->saveXML();
// I put xml header to display the results correctly on the browser
header("Content-type: text/xml");
print_r($xmlOutput);
// I copied here the function for everyone to find it quick
function domTextReplace( $search, $replace, DOMNode &$domNode, $isRegEx = false ) {
if ( $domNode->hasChildNodes() ) {
$children = array();
// since looping through a DOM being modified is a bad idea we prepare an array:
foreach ( $domNode->childNodes as $child ) {
$children[] = $child;
}
foreach ( $children as $child ) {
if ( $child->nodeType === XML_TEXT_NODE ) {
$oldText = $child->wholeText;
if ( $isRegEx ) {
$newText = preg_replace( $search, $replace, $oldText );
} else {
$newText = str_replace( $search, $replace, $oldText );
}
$newTextNode = $domNode->ownerDocument->createTextNode( $newText );
$domNode->replaceChild( $newTextNode, $child );
} else {
domTextReplace( $search, $replace, $child, $isRegEx );
}
}
}
}
This is the output:
<root>
<name>Jack Daniels</name>
</root>