Methods of working with "heavy" XML

$xml = simplexml_load_file("price.xml"); echo "<table border='1'>\n"; foreach ($xml->xpath('/DocumentElement/price') as $producs) { ?> <tr> <td><?php echo $producs->name; ?></td> <td><?php echo $producs->company; ?></td> <td><?php echo $producs->city; ?></td> <td><?php echo $producs->amount ?></td> </tr> <? } echo "</table>\n"; 

 $doc = new DOMDocument(); $doc->load( 'books.xml' ); $books = $doc->getElementsByTagName( "book" ); foreach( $books as $book ) { $authors = $book->getElementsByTagName( "author" ); $author = $authors->item(0)->nodeValue; $publishers = $book->getElementsByTagName( "publisher" ); $publisher = $publishers->item(0)->nodeValue; $titles = $book->getElementsByTagName( "title" ); $title = $titles->item(0)->nodeValue; echo "$title - $author - $publisher\n"; 

 class Simple_Parser { var $parser; var $error_code; var $error_string; var $current_line; var $current_column; var $data = array(); var $datas = array(); function parse($data) { $this->parser = xml_parser_create('UTF-8'); xml_set_object($this->parser, $this); xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1); xml_set_element_handler($this->parser, 'tag_open', 'tag_close'); xml_set_character_data_handler($this->parser, 'cdata'); if (!xml_parse($this->parser, $data)) { $this->data = array(); $this->error_code = xml_get_error_code($this->parser); $this->error_string = xml_error_string($this->error_code); $this->current_line = xml_get_current_line_number($this->parser); $this->current_column = xml_get_current_column_number($this->parser); } else { $this->data = $this->data['child']; } xml_parser_free($this->parser); } function tag_open($parser, $tag, $attribs) { $this->data['child'][$tag][] = array('data' => '', 'attribs' => $attribs, 'child' => array()); $this->datas[] =& $this->data; $this->data =& $this->data['child'][$tag][count($this->data['child'][$tag])-1]; } function cdata($parser, $cdata) { $this->data['data'] .= $cdata; } function tag_close($parser, $tag) { $this->data =& $this->datas[count($this->datas)-1]; array_pop($this->datas); } } $xml_parser = new Simple_Parser; $xml_parser->parse('<foo><bar>test</bar></foo>'); 

 <?php <?php Class StoreXMLReader { private $reader; private $tag; // if $ignoreDepth == 1 then will parse just first level, else parse 2th level too private function parseBlock($name, $ignoreDepth = 1) { if ($this->reader->name == $name && $this->reader->nodeType == XMLReader::ELEMENT) { $result = array(); while (!($this->reader->name == $name && $this->reader->nodeType == XMLReader::END_ELEMENT)) { //echo $this->reader->name. ' - '.$this->reader->nodeType." - ".$this->reader->depth."\n"; switch ($this->reader->nodeType) { case 1: if ($this->reader->depth > 3 && !$ignoreDepth) { $result[$nodeName] = (isset($result[$nodeName]) ? $result[$nodeName] : array()); while (!($this->reader->name == $nodeName && $this->reader->nodeType == XMLReader::END_ELEMENT)) { $resultSubBlock = $this->parseBlock($this->reader->name, 1); if (!empty($resultSubBlock)) $result[$nodeName][] = $resultSubBlock; unset($resultSubBlock); $this->reader->read(); } } $nodeName = $this->reader->name; if ($this->reader->hasAttributes) { $attributeCount = $this->reader->attributeCount; for ($i = 0; $i < $attributeCount; $i++) { $this->reader->moveToAttributeNo($i); $result['attr'][$this->reader->name] = $this->reader->value; } $this->reader->moveToElement(); } break; case 3: case 4: $result[$nodeName] = $this->reader->value; $this->reader->read(); break; } $this->reader->read(); } return $result; } } public function parse($filename) { if (!$filename) return array(); $this->reader = new XMLReader(); $this->reader->open($filename); // begin read XML while ($this->reader->read()) { if ($this->reader->name == 'store_categories') { // while not found end tag read blocks while (!($this->reader->name == 'store_categories' && $this->reader->nodeType == XMLReader::END_ELEMENT)) { $store_category = $this->parseBlock('store_category'); /* Do some code */ $this->reader->read(); } $this->reader->read(); } } // while } // func } $xmlr = new StoreXMLReader(); $r = $xmlr->parse('example.xml'); 

 <?php $xmlWriter = new XMLWriter(); $xmlWriter->openMemory(); $xmlWriter->startDocument('1.0', 'UTF-8'); $xmlWriter->startElement('shop'); for ($i=0; $i<=1000000; ++$i) { $productId = uniqid(); $xmlWriter->startElement('product'); $xmlWriter->writeElement('id', $productId); $xmlWriter->writeElement('name', 'Some product name. ID:' . $productId); $xmlWriter->endElement(); // Flush XML in memory to file every 1000 iterations if (0 == $i%1000) { file_put_contents('example.xml', $xmlWriter->flush(true), FILE_APPEND); } } $xmlWriter->endElement(); // Final flush to make sure we haven't missed anything file_put_contents('example.xml', $xmlWriter->flush(true), FILE_APPEND);