Warning: Cannot modify header information - headers already sent by

zuko · October 31, 2008

I've just knocked up a quick login system using cookies and when I run my login script I get this error:

Warning: Cannot modify header information - headers already sent by (output started at \var\www\web\header.php:9) in \var\www\web\login.php on line 31

here is my header.php script:

<?php
session_start();
require_once "inc.php";
?>
<html>
<head>
<title>.: Video Streaming >></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
.kiri {
 background-image: url(gambar/tmp_11bg.gif);
 background-repeat: repeat-y;
}
.kanan {
 background-image: url(gambar/tmp_10bg.gif);
 background-repeat: repeat-y;
 width: 40px;
}
.tekssatu {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 11px;
 color: #FFFFFF;
}
.teksdua {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 11px;
 color: #000000;
}
.tekstiga {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 10px;
 color: #000000;
}
.tengah {
 background-image: url(gambar/tmp_02bg.gif);
 background-repeat: repeat-x;
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 10px;
 color: #FFFFFF;
}
a:link,a:active,a:visited {
 color : #FF6600;
 text-decoration: none;
}
a:hover	   { text-decoration: underline; color : #FF0000; }
.mainmenu		    {
 font-weight: bold;
 font-size: 12px;
 color : #006699;
 text-decoration: none;
}
a.mainmenu	   { test-decoration: none; color : #006699; }
a.mainmenu:hover{ text-decoration: underline; color : #DD6900; }

input,textarea, select {
 color : #000000;
 font: normal 11px Verdana, Arial, Helvetica, sans-serif;
 border: 1px #000000;
}
/* The text input fields background colour */
input.post, textarea.post, select {
 background-color : #FFFFFF;
}

input { text-indent : 2px; }

/* The buttons used for bbCode styling in message post */
input.button {
 background-color : #EFEFEF;
 color : #000000;
 font-size: 11px;
 font-family: Verdana, Arial, Helvetica, sans-serif;
 border: 1px solid #000000;
}

/* The main submit button option */
input.mainoption {
 background-color : #FAFAFA;
 font-weight : bold;
}
input.maindua {
 background-color : #FAFAFA;
 font-weight : bold;
 border: 1px solid #000000;
}
.garis {
 border: 1px solid #000000;
}
.judul {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 13px;
 font-weight: bold;
 color: #FF6600;
 text-decoration: none;
}
tr.header {
 font-weight: bold;
 border: solid #000000;
 height: 20px;
 bakground-color: #A6D2FF;
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 13px;
 color: #FF6600;
 text-decoration: none;
}
-->
</style>
</head>

<body background="gambar/bg.gif">
<table width="646" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr>
    <td><table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
  <td width="297"><img src="gambar/tmp_01.gif" width="297" height="51"></td>
  <td class="tengah" width="100%"><marquee direction="left" scrollamount="10" scrolldelay="200">Welcome to Adaptive Video Streaming with MPEG-4 Encoding</marquee></td>
  <td width="40" align="right"><img src="gambar/tmp_03.gif" width="40" height="51"></td>
</tr>
    </table></td>
  </tr>
  <tr>
    <td><table width="100%"  border="0" cellspacing="0" cellpadding="0">
<tr>
  <td width="162" height="70"><img src="gambar/tmp_04.gif" width="162" height="70"></td>
  <td width="161"><img src="gambar/tmp_05.gif" width="161" height="70"></td>
  <td width="162"><img src="gambar/tmp_06.gif" width="162" height="70"></td>
  <td width="161"><img src="gambar/tmp_07.gif" width="161" height="70"></td>
</tr>
    </table></td>
  </tr>
  <tr>
    <td width="100%"><table width="100%"  border="0" cellspacing="0" cellpadding="0">
<tr>
  <td class="kiri" width="122" valign="top" height="100%"><table width="100%"  border="0" cellspacing="0" cellpadding="0">
    <tr>
	<td width="122" height="126"><img src="gambar/tmp_08.gif" width="122" height="126"></td>
    </tr>
    <tr>
	<td height="100%" align="center" background="gambar/tmp_11bg.gif" class="kiri">
		    <? if (emptyString($_COOKIE[id])){ ?>
		    <form action="login.php" method="post">
		    <div class="tekssatu">Username : <br>
		      <input type="text" name="usrnm" size="10" class="mainoption">
		    <br>
		    Password : <br>
		      <input name="psw" type="password" size="10" class="mainoption">
		    <br><br>
		      <input type="submit" value="login >>" class="button">
		    </div>
		    </form>
		    <? } else { ?>
		    <div class="mainmenu">
		    <a href="/admin.php"><img src="gambar/administrator.gif" width="38" height="38" border="0"><br>
		      Administrator</a>
		    <br>
		    <a href="/login.php?mod=logout"><img src="gambar/logout.gif" border="0"><br>
			LOGOUT</a></div><br>
		    <div class="teksdua">Camera<br>Position<br><br>
		    <table width="70" border="0" cellpadding="0" cellspacing="5" class="tekssatu">
  <tr align="center">
    <td><a href="/cgi-bin/kamera_cw.cgi">cw</a></td>
    <td><a href="/cgi-bin/kamera_ccw.cgi">ccw</a></td>

/*Script di atas digunakan untuk menggerakkan kamera dari website*/

  </tr>
  </table>
	   </div>
		    <? }?></td>
    </tr>
  </table></td>
  <td width="484" align="center" valign="top" bgcolor="#FFFFFF">
	   <?
	   if (emptyString($_COOKIE[id])){
	   ?>
    <table width="100%"  border="0" cellspacing="0" cellpadding="0">
	<tr align="center">
	  <td><a href="open.php"><img src="gambar/g2.jpg" width="60" height="60"></td>
	  <td><a href="video.php"><img src="gambar/g1hidden.jpg" width="60" height="60"></td>
	  <td><a href="viewpict.php"><img src="gambar/g3hidden.jpg" width="60" height="60"></td>
	  <td><a href="viewtrafik.php"><img src="gambar/g4hidden.jpg" width="60" height="60"></td>
	  <td><a href="help.php"><img src="gambar/g5hidden.jpg" width="60" height="60"></td>
	</tr>
	<tr align="center" class="teksdua">
	  <td><a href="open.php">Open Streaming</td>
	  <td><a href="video.php">Video Capture </td>
	  <td><a href="viewpict.php">View Capture </td>
	  <td><a href="viewtrafik.php">View Traffic </td>
	  <td><a href="help.php">Help</td>
	</tr>
    </table><? } else {?>
    <table width="100%"  border="0" cellspacing="0" cellpadding="0">
	<tr align="center">
	  <td><img src="gambar/g2.jpg"></td>
	  <td><a href="video.php"><img src="gambar/g1.jpg" border="0"></a></td>
	  <td><a href="viewpict.php"><img src="gambar/g3.jpg" border="0"></a></td>
	  <td><a href="http://www.10.14.200.2:3001"><img src="gambar/g4.jpg" border="0"></a></td>
	  <td><a href="/help.php"><img src="gambar/g5.jpg" border="0"></a></td>
	</tr>
	<tr align="center" class="teksdua">
  <td><a href="/open.php">Open Streaming</a></td>
  <td><a href="/video.php">Video Capture</a> </td>
  <td><a href="/viewpict.php">View Picture</a> </td>
  <td><a href="/viewtrafik.php">View Traffic</a> </td>
  <td><a href="/help.php">Help</a></td>
	</tr>
    </table> <? }?> <br><br>

and here is my login.php script :

<?
include "header.php";
switch ($mod){
 case "logout" : /*session_unregister($_SESSION[usrnm]);
					 $_SESSION[usrnm] = "";
					 unset($_SESSION[usrnm]);

 session_unregister($_SESSION[id]);
					 $_SESSION[id] = "";
					 unset($_SESSION[id]);*/
					 setcookie("username","");
					 setcookie("id","");
					 message_url("Anda telah logout..Terima kasih atas kunjungannya!!!","/");
					 break;

 default :
	   if (emptyString($_POST[usrnm])) message_back('Username belum diisi');
	   if (emptyString($_POST[psw])) message_back('Password belum diisi');
	   //cek di table (proses authentifikasi)
	   $pass_md5 = md5($_POST[psw]);
	   $qr = mysql_query("SELECT * FROM stream WHERE username='$_POST[usrnm]' AND password='$pass_md5'");
	   $loaduser = mysql_fetch_assoc($qr);

	   if (mysql_num_rows($qr) == '1'){
		    /*Create session
		    session_register("usrnm");
		    $_SESSION[usrnm]="$loaduser[username]";
		    session_register("id");
		    $_SESSION[id]="$loaduser[id]";*/

 setcookie("username","$loaduser[username]");
 		    setcookie("id","$loaduser[id]");
		    message_url("Selamat Datang $loaduser[nama]","/admin.php");
	   } else {
		    message_back('Username/Password Anda salah... data tidak ditemukan');
	   }
	   break;

}
include "footer.php";
?>

This is really killing the functionality of the site.Any help would be greatly appreciated.

(edited by kenrbnsn to add

tags)

Adam · October 31, 2008

setCookie must be sent with the header, ie. before any HTML ..

revraz · October 31, 2008

http://www.phpfreaks.com/forums/index.php/topic,37442.0.html

zuko · November 2, 2008

my friend had told me that, adam. but i still dont understand what to do (newbie). so.. what should i do with the script? would you mind guiding me with the script? thanks.

Adam · November 4, 2008

what's in header.php? If there's HTML in there you'll need to put that after you process the login ..

zuko · November 6, 2008

i've posted my header.php . yes, but the login process always included header.php, i've posted login.php too. where is exactly i put the html ?

mrMarcus · November 6, 2008

try wrapping your page with...

<?php
session_start();
ob_start();

//  everything else...

ob_end_flush();
?>

zuko · November 10, 2008

thanks marcus, i'll try

wrathican · November 10, 2008

did you even read the link that revraz posted?

it's a stickied topic in this section. please read it, the information in there is invaluable

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