Cannot modify header information - headers already sent while processing the page

Question

Please help me to fix this error this error

Warning: Cannot modify header information - headers already sent by (output started at /home/amberadv/public_html/admin/login.php:11) in /home/amberadv/public_html/admin/login.php on line 17

     <?php

session_start();

include_once('connect.php');

if(isset($_REQUEST['login']))

{

    $username=$_REQUEST['username'];

    $password=$_REQUEST['password'];

    $sql="select * from `admin` where `user`='$username' and `pass`='$password'";

    $result=mysql_query($sql);

    $records= mysql_fetch_array($result);

    print_r($records);

    //$count=mysql_num_rows($result);

    $_SESSION['user']=$username;    

    if($records['user']==$username && $records['pass']==$password)
    {
             //echo "in";
        header("Location:index.php");
    }

    else

    { 

    echo "out";

    print "Username And Password Incorrect";

    }

}

?>

score 0 · Answer 1 · answered Aug 14 '17 at 07:59

This can be happen majorly just because it may happen that due to

you are sending headers information which are already been sent
It may happen that you have started the session two times or multiple times in a page.

As you have provide the minimal information so try doing this

ob_clean

What it does?

This function discards the contents of the output buffer.

score 0 · Accepted Answer · answered Aug 14 '17 at 08:00

0

Problem is you are echo something before you do header("Location:index.php"); redirection

Check these cases

Remove the space before <?php tag
Remove all echo statements in connect.php and login.php

answered Aug 14 '17 at 08:00

Thamaraiselvam

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Cannot modify header information - headers already sent while processing the page

2 Answers2