Following script will allow you to reproduce the bug. The script doesn't crash when we add 100 nodes but it crashes for a bigger (500) number of nodes. It seesms like it finishes executing all the statements and crashes after the last one.


<?php 

$xmlString = GetBaseAppXML();
if( !$xmlDoc = domxml_open_mem( $xmlString ) ) {
  echo "Error while creating DOM object\n";
  exit;
}

for ( $i=0; $i<500; $i++ ) {
	UpdateAppXML( $xmlDoc, $i, "This" );
}

echo( $xmlDoc->dump_mem( true ));
exit;
function GetBaseAppXML() {
	$strXML = '<?xml version="1.0" ?>';
	$strXML = $strXML.'<XMLPage>';
	$strXML = $strXML.'</XMLPage>';
	
	return $strXML;
}

function UpdateAppXML( &$xmlDoc, $key, $value ) {
	$searchStr = "//SET[@VARNAME = '".$key."']" ;

	$xpathCtx = xpath_new_context( $xmlDoc );
	$arrSetElem = xpath_eval( $xpathCtx, $searchStr );
	$setElem = $arrSetElem->nodeset[0];
	
	if ( is_object( $setElem ) ) {
		$setElem->set_attribute( "VALUE", $value );
	} else {
		$searchStr = "/XMLPage" ;
		$rootElem = $xmlDoc->document_element();
		if ( $rootElem != null ) {
			$newElem = $xmlDoc->create_element( "SET" );
			$newElem->set_attribute( "VARNAME", $key );
			$newElem->set_attribute( "VALUE", $value );
			$newElem = $rootElem->append_child( $newElem );
			unset( $newElem );			
		} else {
			$strMsg = "UpdateAppXML :: Failed to get ROOT element in file: ".$appFilePath ;
			print( "Error processing request<BR>" );
			print( $strMsg );
			unset( $strMsg );
		}			
		unset( $rootElem );
	}
	
	unset( $xpathCtx );
	unset( $arrSetElem );
	unset( $setElem );
}
?>