php里Array2xml

<?php
class Array2xml
{
    var $xml;
    function array2xml($array,$encoding='utf-8') {
        $this->xml='<?xml version="1.0" encoding="'.$encoding.'"?>';
        $this->xml.=$this->_array2xml($array);
    }
    function getXml() {
        return $this->xml;
    }
    function _array2xml($array)
    {
        $xml='';
        foreach($array as $key=>$val){
            if(is_numeric($key)){
                $key="item id=\"$key\"";
            }else{
                //去掉空格，只取空格之前文字为key
                list($key,)=explode(' ',$key);
            } 
            $xml.="<$key>";
            $xml.=is_array($val)?$this->_array2xml($val):$val;
            //去掉空格，只取空格之前文字为key
            list($key,)=explode(' ',$key);
            $xml.="</$key>";
        }
        return $xml;
    }
}