$ _SESSION存储错误的值

Question

I made a portal where i have to fetch result with primary key as id i am using it everywhere storing it in a variable however there is a certain problem that i am facing

$sql="SELECT users from hostelusers WHERE users Like'%$roll%'"; 
$result = mysql_query($sql) or die(mysql_error());
        $rows=mysql_fetch_row($result);
        $uid=$rows[0];
$_SESSION['uid']=$uid;

In my code the variable $uid is echoing out values of column 1 ie users however I have selected column 0 which is id(in the table in mysql)

can't think of any mistake there

Answer 1

your mysql query string is wrong . You are using :

$sql="SELECT users from hostelusers WHERE users Like'%$roll%'";

And how do you expect to get id field in the result ??

Moreover you will be having only a single column [field] in your rows[] and that is rows[0]

if you want to use rows[0] to get your id field

Change your query to this

$sql="SELECT id from hostelusers WHERE users Like'%$roll%'";

or this:

$sql="SELECT * from hostelusers WHERE users Like'%$roll%'";

and it will work for sure