请教一个判断问题，谢谢指导
<?php
require(“conn.php”);
$sid=$_GET[“id”];
$result=mysql_query(“select * from jswo where id=’$sid’ order by id desc limit 0,1”);
$rs=mysql_fetch_array($result);
?>
<?php echo $rs[“a1”]; ?>
<?php echo $rs[“neirong”]; ?>
<?php echo $rs[“neirong”]; ?>
