<?
$userid"= $_POST['userid'];
$username"= $_POST['usernname'];$connect=mysql_connect("localhost","root","");
$select=mysql_select_db("study",$connect); $sql="select * from student where id='$userid' and name='$username'";
.....
$userid"= $_POST['userid'];
$username"= $_POST['usernname'];$connect=mysql_connect("localhost","root","");
$select=mysql_select_db("study",$connect); $sql="select * from student where id='$userid' and name='$username'";
.....
改为$sql="select * from student where (id=\"$userid\") and (name=\"$username\")";
就可以了
$connect=mysql_connect("localhost","root","");
$select=mysql_select_db("study",$connect); $userid=$_POST['userid'];
$username=$_POST['username'];
if($userid!=""&&$username!=""){
$sql="select * from student where id='".$userid."' and name='".$username."'";
$result=mysql_query($sql,$connect);
$num=mysql_num_rows($result);
if($num==0)
{
echo "对不起!你的用户名/密码不正确!";
}
else
{
echo "登陆成功!";
}
}
else{
echo "没有正确的输入用户名与密码吧!";
}
?>
$userid=$_POST['userid'];
$username=$_POST['username'];
也可以是:$u_name = $HTTP_POST_VARS['u_name'];
$u_pass = $HTTP_POST_VARS['u_pass'];其中的POST,如果前台是GET,则修改成GET(注意,是大写!)