php xml相关操作

<?php
class Utils{
    /**
     * 将数据转为XML
     */
    public static function toXml($array){
        $xml = '<xml>';
        forEach($array as $k=>$v){
            $xml.='<'.$k.'><![CDATA['.$v.']]></'.$k.'>';
        }
        $xml.='</xml>';
        return $xml;
    }
    
    public static function dataRecodes($title,$data){
        $handler = fopen('result.txt','a+');
        $content = "================".$title."===================\n";
        if(is_string($data) === true){
            $content .= $data."\n";
        }
        if(is_array($data) === true){
            forEach($data as $k=>$v){
                //$content .= "key: ".$k." value: ".$v."\n";
                $content.='<'.$k.'><![CDATA['.$v.']]></'.$k.'>'."\n";
            }
        }
        $flag = fwrite($handler,$content);
        fclose($handler);
        return $flag;
    }

    public static function parseXML($xmlSrc){
        if(empty($xmlSrc)){
            return false;
        }
        $array = array();
        libxml_disable_entity_loader(true);
        $xml = simplexml_load_string($xmlSrc);
        $encode = Utils::getXmlEncode($xmlSrc);

        if($xml && $xml->children()) {
            foreach ($xml->children() as $node){
                //有子节点
                if($node->children()) {
                    $k = $node->getName();
                    $nodeXml = $node->asXML();
                    $v = substr($nodeXml, strlen($k)+2, strlen($nodeXml)-2*strlen($k)-5);
                    
                } else {
                    $k = $node->getName();
                    $v = (string)$node;
                }
                
                if($encode!="" && $encode != "UTF-8") {
                    $k = iconv("UTF-8", $encode, $k);
                    $v = iconv("UTF-8", $encode, $v);
                }
                $array[$k] = $v;
            }
        }
        return $array;
    }

    //获取xml编码
    function getXmlEncode($xml) {
        $ret = preg_match ("/<?xml[^>]* encoding=\"(.*)\"[^>]* ?>/i", $xml, $arr);
        if($ret) {
            return strtoupper ( $arr[1] );
        } else {
            return "";
        }
    }
}
?>