<?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;     } }