error on line 2 at column 1: Extra content at the end of the document

Question

<?php/*** 按xml方式输出通信方式* @param integer $code状态码* @param string $message提示信息* @param array $data数据* return string*/class response{ public static function xmlEncode($code,$message,$data = array()){ if(!is_numeric($code)){ return ''; } $result = array('code' => $code,'message' => $message,'data' => $data); header('Content-Type:text/xml'); $xml = "<?xml version='1.0' encoding='UTF-8'?>"; $xml .="<root>"; $xml .= self::xmlToEncode($result); $xml .="</root>"; echo $xml; } public static function xmlToEncode($data){ $xml = ""; foreach($data as $key => $value){ $xml .= "<{$key}>"; $xml .= $value; $xml .= "</{$key}>"; } return $xml; }} $data = array( 'id' => 1, 'name' => 'fengxupeng', ); Response::xmlEncode(200,'success',$data);?>哪里出错啦 ??

Answer 1

没有加根标签呀！XML文件只能有一个根标签！