php问题，关于葫芦林聊天室

<?php
$cn=curl_init();

curl_setopt($cn,CURLOPT_URL,'http://172.255.106.115/wap/read.php?sid=eQMFEBDOLCYQBDeQHma22APztxEA80A&amp;id=chatz2');

curl_setopt($cn,CURLOPT_POST,true);

curl_setopt($cn,CURLOPT_RETURNTRANSFER,true);

$data = array('nr'=>'测试',
'u'=>'%2Fwap%2Fread.php%3Fid%3Dchat%26d%3D%25E5%2585%25AC%25E5%2585%25B1%25E8%2581%258A%25E5%25A4%25A9%25E5%25AE%25A4%26sid%3DeQMFOLCYQWleQHma22APztxEAAA',
'd'=>'公共聊天室');

curl_setopt($cn,CURLOPT_POSTFIELDS,$data);

$ret=curl_exec($cn);

curl_close($cn);

echo $ret;
?>