Yii Framework writes XML interface

<?PHPclassInterfacescontrollerextendscontroller{/** Member access record XML interface * 2015-07-15*/       Public functionactionmemberrecordlist () {//get parameters from URL path        $stardate=$_get[' StarDate ']; $ltime=$_get[' Ltime ']; $key=$_get[' Key ']; $mykey=MD5($stardate.$ltime.‘ ASDE89DSMM '); //determine if the Ltime request is longer than 60 seconds//Determine if the key is correct        if($key!=$mykey) {            Echo' Key error ';//indicates an illegal request            Exit(); }         if($ltime+60<= ( Time())){            Echo' Time expires ';//indicates an illegal request            Exit(); }        //satisfies the condition query user accesses the record table         $sql="select User_name,reference_url,module,action,login_ip,login_time from ' Smm_en_user_log ' Where login_time>= ' {$stardate} ' and user_name! = ' "; $result=yii::app ()->db->createcommand ($sql),Queryall (); if($result){                        $html=<?xml version= "1.0" encoding= "UTF-8"?> <memberrecordlist xmlns= "HTTP://WWW.SITEMAPS.O rg/schemas/sitemap/0.9 "xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance "Xsi:schem alocation=" http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd ">‘; foreach($result  as $key=$value) {                     if(Preg_match('/(\<*\>) +/',$value[' Action '])){                          Continue; }Else{                        $html=<recordinfo> <email>‘.$value[' user_name ']. '</email> <source>‘.$value[' Reference_url ']. '</source> <items>‘.$value[' module ']. '</items> <content>‘.$value[' Action ']. '</content> <ip>‘.$value[' Login_ip ']. '</ip> <date>‘.$value[' Login_time ']. '</date> </recordinfo>‘; }                            }                 $html. = ' </memberrecordlist> '; Echo $html; }Else{                 Echo' Sorry, the query data is empty, there is no data to meet the demand! ‘; Exit(); }          }

Yii Framework writes XML interface