Iam getting an errors like session_start[function.session-start]: How to solve this?

[lkpsrinivasan]

(lines from 40 to 71)

My error while running the program is
(Warning: session_start() [function.sessio n-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs \sri1\login.php :40) in C:\xampp\htdocs \sri1\login.php on line 40

Warning: session_start() [function.sessio n-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs \sri1\login.php :40) in C:\xampp\htdocs \sri1\login.php on line 40)

_______________ _______________ _______________ ____________

coding:

<?php session_start();
   
   	include "connect.php";
	
	if(isset($_POST['b1']))
	{
	 $a1=$_POST["t1"];
	 $a2=$_POST["t2"];
	 
	 if($a1!="" && $a2!="")
	 {
	  $query="SELECT * FROM user where name='$a1' && pwd='$a2' ";
	  $result=mysql_query($query,$con);
	  
	  $fetch=mysql_fetch_array($result);
	  $count=mysql_num_rows($result);
	  
	  if($count)
	  {
	   $_SESSION['uid']=$fetch[0];
	   $_SESSION['pwd']=$fetch[1];
	   header("location:ok.php");
	  }
	  
	  else
	  {
	   echo "<script language='Javascript' type='text/javascript'> alert(Invalid User') </script>";
	  }
	  }
	  }
	  
	  ?>

[JKing]

What are you doing between lines 1-39?

session_start() ; needs to come before any output is sent to the browser.

[lkpsrinivasan]

My full program from lines 1 to 77. Now reply me the solution...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<script>
function one()
{
 var a1,a2;
 a1=f1.t1.value;
 a2=f1.t2.value;
 var statement="";
 var i=0;
 
 if((a1=="") | (a2==""))
 {
  i++;
  statement = i + ")* No Fields should be Empty \n"
 }
 
 if(statement!="")
 {
  alert(statement);
 }
 }
 </script>  
<body>
<p>&nbsp;</p>
<p>Login Form</p>
<form name=f1 method=post>
Username <input type=text name=t1 /><br /><br />
  Password 
<input type=text name=t2 /><br /><br />
   &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<input name="b1" type="button" id="b1" value="Login" onclick="one()"/>
   </form>
   
   
   <?php session_start();
   
   	include "connect.php";
	
	if(isset($_POST['b1']))
	{
	 $a1=$_POST["t1"];
	 $a2=$_POST["t2"];
	 
	 if($a1!="" && $a2!="")
	 {
	  $query="SELECT * FROM user where name='$a1' && pwd='$a2' ";
	  $result=mysql_query($query,$con);
	  
	  $fetch=mysql_fetch_array($result);
	  $count=mysql_num_rows($result);
	  
	  if($count)
	  {
	   $_SESSION['uid']=$fetch[0];
	   $_SESSION['pwd']=$fetch[1];
	   header("location:ok.php");
	  }
	  
	  else
	  {
	   echo "<script language='Javascript' type='text/javascript'> alert(Invalid User') </script>";
	  }
	  }
	  }
	  
	  ?>
	   
	   
	   
	 
</body>
</html>

[JKing]

As I said in my earlier post "session_start() ; needs to come before any output is sent to the browser. "

You need to place your php code above your html.

[mwasif]

session_start() must be placed before HTML. You other HTML may come after it but wit one exception i.e. header() should not be called after any output (the same rule as we had for session_start() ).

[mwasif]

Moved to PHP forum.

[Angel Zois]

Same problem , but i don't have anything before session-start.

The Error: Warning: session_start() [function.sessio n-start]: Cannot send session cache limiter - headers already sent (output started at C:\webs\fr\new_ ma.php:1) in C:\webs\fr\new_ ma.php on line 2

<?php
session_start();
if (!isset($_SESSION['myusername']))
  header("Location: main_login.php");
include('variables.php'); 
include('header_ajax.php');
if(isset($_POST['add']))
{
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
  die('Error: ' . mysql_error());
}
.
.
.

[Angel Zois]

I have found why i have the problem. I am using PSPAd Editor and i found this on www :

If you are saving the file in UTF-8 format, then your editor may be saving a BOM (byte order mark) at the start of the file. Either change encoding or see if your editor has a setting to not include the BOM.

Yes i am saving at UTF-8 and i had to disable the setting on Program setting "Ident.byte s in UTF-8 coding"

So is not the code the proble , is the editor. If you still have the same problem and you have the session_start() ; at the first line without spaces check for you editor.

[kovik]

Maybe for you, yeah. The OP's problem is probably the loads of HTML before session_start() . lol

If you want my opinion, use Notepad++. It's simple, extensible, and has a small footprint.