php的一个诡异的问题

<?php

mysql_connect("127.0.0.1" , "root" , "dba") or die("数据库连接失败!");
//echo "数据库连接成功!<br>";
mysql_select_db("campany");
$campany=$_POST["campany"];
$name=$_POST["name"];
$tel=$_POST["tel"];
$fax=$_POST["fax"];
$content=$_POST["content"];

$sql="INSERT INTO web (`campany` , `name` , `tel` , `fax` , `content` ) VALUES ('$campany', '$name', '$tel', '$fax', '$content' );";
mysql_query($sql);
//mysql_close();
$sql="SELECT * FROM campany.web";
$result=mysql_query($sql);
$rs=mysql_fetch_object($result);
echo $rs->campany;
echo $rs->content;
echo $rs->name;
echo $rs->tel;<