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 ;
    }
}