session_start(): Cannot send session cookie - headers already sent by

[manish812]

hi
thrr is no one who can help me this is the prog which when i run faces problem of session.

session_start(): Cannot send session cookie - headers already sent

pls plssssssssss help me to solve the problem below is the code

any one this is simple prog but i can't run
if i can't run thn my boss will kick me out of the office.
so pls hlp me.




[php]<?session_start();?>
<?php
include"db_config.php";
$connect = mysql_connect("$db_host", "$db_user", "$db_password");
mysql_select_db("$db_name", $connect) or die(mysql_error());
$f_name= $_POST['fname'];
$l_name= $_POST['lname'];
$pass= $_POST['password'];
$query = "SELECT * from helpagent WHERE first='$f_name' and last='$l_name' and password='$pass' ";
$result = mysql_query($query);
for ($i = 0; $i < mysql_num_rows($result); $i++)
{
$id = mysql_result($result, $i, "agentid");
$fname = mysql_result($result, $i, "first");
$lname = mysql_result($result, $i, "last");
$pas = mysql_result($result, $i, "password");
if (("$f_name" == "$fname") and ("$l_name" == "$lname") and ("$pass" == "$pas"))
{
$_SESSION['sfname'] = $fname;
$_SESSION['slname'] = $lname;
$_SESSION['sid'] = $id;
echo("");
exit;
}//if loop
}//for loop
?>[/php]

[Puckdropper]

I suggest you read the other threads you started, as well as the manual. There are also some very good how-tos out there to teach you how to properly do what you want to.

[RamiroS]

Check the manual... if that script is included check that the file that it is actually including it doesn't have any print or echo. session_start() should be at the very beginning of the code.

Also change this:

[php]
<?session_start();?>
<?php
include"db_config.php";
[/php]

to this

[php]
<?php
session_start();
include"db_config.php";
[/php]

There is no need to break the PHP tags there... and use <?php also instead of <? it will make the script work in other servers. Or maybe your server doesn;t support short php tags.

[BlazingWolf]

I'm assuming that your including this file into another file, and in that other file you have already echoed something when this file is included.

Otherwise I cannot see what is wrong, as suggested the manual always helps.

[berhansoner]

Be sure that your SafeMode CLOSED. Ask your hosting company t switch it to CLOSED. The problem will be solved

hi thrr is no one who can help me this is the prog which when i run faces problem of session.

session_start(): Cannot send session cookie - headers already sent pls plssssssssss help me to solve the problem below is the code any one this is simple prog but i can't run if i can't run thn my boss will kick me out of the office. so pls hlp me. [php]<?session_start();?> <?php include"db_config.php"; $connect = mysql_connect("$db_host", "$db_user", "$db_password"); mysql_select_db("$db_name", $connect) or die(mysql_error()); $f_name= $_POST['fname']; $l_name= $_POST['lname']; $pass= $_POST['password']; $query = "SELECT * from helpagent WHERE first='$f_name' and last='$l_name' and password='$pass' "; $result = mysql_query($query); for ($i = 0; $i < mysql_num_rows($result); $i++) { $id = mysql_result($result, $i, "agentid"); $fname = mysql_result($result, $i, "first"); $lname = mysql_result($result, $i, "last"); $pas = mysql_result($result, $i, "password"); if (("$f_name" == "$fname") and ("$l_name" == "$lname") and ("$pass" == "$pas")) { $_SESSION['sfname'] = $fname; $_SESSION['slname'] = $lname; $_SESSION['sid'] = $id; echo(""); exit; }//if loop }//for loop ?>[/php]

[alagirinetaxis]

<?php session_start();
ob_start();

include"db_config.php";

$connect = mysql_connect("$db_host", "$db_user", "$db_password");
mysql_select_db("$db_name", $connect) or die(mysql_error());
$f_name= $_POST['fname'];
$l_name= $_POST['lname'];
$pass= $_POST['password'];
$query = "SELECT * from helpagent WHERE first='$f_name' and last='$l_name' and password='$pass' ";
$result = mysql_query($query);
for ($i = 0; $i < mysql_num_rows($result); $i++)
{
$id = mysql_result($result, $i, "agentid");
$fname = mysql_result($result, $i, "first");
$lname = mysql_result($result, $i, "last");
$pas = mysql_result($result, $i, "password");
if (("$f_name" == "$fname") and ("$l_name" == "$lname") and ("$pass" == "$pas"))
{
$_SESSION['sfname'] = $fname;
$_SESSION['slname'] = $lname;
$_SESSION['sid'] = $id;
echo("<script>document.location.href='user_page.php';</script>");
exit;
}//if loop
}//for loop
?>

[toddor]

Sometimes the problem is caused by the Dreamweaver's "Include Unicode Signature (BOM)" property.
To turn it off go to Modify > Page Properties > Title/Encoding in Dreamweaver and uncheck "Include Unicode Signature (BOM)"

[sahana_prasanna]

I had the same problem and solved it. do you know how? use error suppression operator @ symbol just before session_start().
i. e., <?php
ob_start();
@session_start();
?>
It really works without any problem :-)

[daryll1]

If your going to use the ob_start() tag dont forget the ob_flush() tag right at the end of the page.
But obviously its better if you can actually sort the problem out.

[66geo]

I hade the same problem, and i solve it with Toddors replay (Sometimes the problem is caused by the Dreamweaver's
Thank you Toddor.

[mandil.shashank]

I had the same problem and solved it. do you know how? use error suppression operator @ symbol just before session_start(). i. e., <?php ob_start(); @session_start(); ?> It really works without any problem :-)

Great solution... tried it and it worked perfectly. Thanks for the help