Пример парсера XML-файлов

<?

Error_Reporting(E_ALL);
ini_set('display_errors', TRUE);
@ini_set('memory_limit', '512M');
@set_time_limit(0);
@ini_set('max_execution_time',0);
@ini_set('set_time_limit',0);
@ob_end_flush();
$start_time = microtime(true);
$g=0;
$_db="data/slonxml.db";  // название будущей базы, папка data в данном примере должна уже быть создана
$_xml="slon.xml";        // xml файл, который нужно распарсить
$xml_td=array("id", "_id", "merchant_id", "gs_product_key", "article", "gs_category_id", "original_picture", "name", "description", "vendor", "model", "url", "price", "categoryid", "param");
$cat_td=array("id", "_id","parent_id","name");

function ar($ar,$at)
{
    $zip=preg_replace("/(.*)$at$/",'\1',$ar);
    $zip=explode($at,$zip);
    return $zip;
}

function str($ar,$at)
{
    $zip=preg_replace("/(.*)$at$/",'\1',$ar);
    return $zip;
}

function kv($ssl)
{
    $ssl=preg_replace("/\"|\'/",'',$ssl);
    return $ssl;
}

function baza($xml_td,$cat_td)
{
    global $_db,$dbx;
    if (!file_exists($_db))
    {
        $xml_list="";$cat_list="";
        foreach($xml_td as $k) {$lis=$k=='id'?"INTEGER PRIMARY KEY":"TEXT";$xml_list.="$k $lis,";}
        foreach($cat_td as $k) {$lis=$k=='id'?"INTEGER PRIMARY KEY":"TEXT";$cat_list.="$k $lis,";}
        $xml_list=str($xml_list,",");$cat_list=str($cat_list,",");
        $dbx = new SQLite3($_db);
        $dbx->busyTimeout(5000);
        $dbx->exec('PRAGMA journal_mode=WAL;');
        $dbx->exec("CREATE TABLE IF NOT EXISTS cat ($cat_list);");
        $dbx->exec("CREATE TABLE IF NOT EXISTS xml ($xml_list);");
        $dbx->close();
    }
    $dbx = new SQLite3($_db);
    $dbx->busyTimeout(5000);
    $dbx->exec('PRAGMA journal_mode=WAL;');
}

baza($xml_td,$cat_td);
$x_id = array_shift($xml_td);
$c_id = array_shift($cat_td);
$reader = new XMLReader();
$reader->open($_xml);
$dbx->exec('BEGIN IMMEDIATE;');

while ($reader->read())
{
    if ($reader->nodeType == XMLREADER::ELEMENT&&$reader->localName == 'categories')
    {
        $category = new SimpleXMLElement($reader->readouterXML());
        foreach($category as $lin)
        {
            $cats=$lin->attributes();
            $cat="'".$cats['id']."','".$cats['parent_id']."','".$lin."'";
            $dbx->exec("INSERT INTO cat (_id,parent_id,name) VALUES ($cat);");
        }
    }
    if ($reader->nodeType == XMLREADER::ELEMENT&&$reader->localName == 'offer')
    {
        $offer = new SimpleXMLElement($reader->readouterXML());
        $attr=$offer->attributes();
        $params = $offer->param;
        $name= kv($offer->name);
        $price= kv($offer->price);
        $picture = $offer->picture;
        $original_picture = $offer->original_picture;
        $description = kv($offer->description);
        $vendor = kv($offer->vendor);
        $model = kv($offer->model);
        $url = $offer->url;
        $gs_category_id = $attr['gs_category_id'];
        $merchant_id = $attr['merchant_id'];
        $article=$attr['article'];
        $gs_product_key=$attr['gs_product_key'];
        $_id=$attr['id'];
        $categoryid= $offer->categoryId;
        $param1="";$param2="";
        foreach ($params as $atr){$param1.=$atr['name']."~";$param2.=$atr."~";}
        $param1=ar($param1,"~");$param2=ar($param2,"~");
        $param=serialize(array_combine($param1,$param2));
        $ntb="";$array="";
        foreach($xml_td as $nm){$ntb.=$nm.",";$array.="'".$$nm."',";}
        $ntb=str($ntb,",");$array=str($array,",");
        $dbx->exec("INSERT INTO xml ($ntb) VALUES ($array);");
        if($g/200==intval($g/200))
        {
            $dbx->exec('COMMIT;');
            $dbx->exec('BEGIN IMMEDIATE;');
        }
        $g++;
    }
}

$dbx->exec('COMMIT;');
$dbx->close();

$exec_time = round(microtime(true) - $start_time, 3);
$memory = round(memory_get_usage() / 1024, 3);
echo "<br><hr><br>Загружено $g за $exec_time сек. | Memory: $memory Kb.";


?>