Simple class to parse BIG xml files without loading them in memory. It parses one tag a time.

xml_parser.php

$reader = new XMLReaderToSimpleXML();
$reader->open($filePath);
while($package = $reader->nextElement('Package')){
    parsePackage($package); // edit this to do the parsing stuff
}


class XMLReaderToSimpleXML extends XMLReader{
    function nextElement($tagName){
        while($this->read()){
            if($this->localName == $tagName && $this->nodeType == XMLReader::ELEMENT){
                return simplexml_load_string($this->readOuterXml());
            }
        }
        return false;
    }
}