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How to Fix “Cannot modify header information - headers already sent” error in

deemurphy

By deemurphy
in Third Party Scripts

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deemurphy Member

deemurphy

Posted
Posted

I am using the following code which calls has two header staements:

 

<!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=iso-8859-1" />

<title>Brain-Host Login</title>

<link href="style.css" rel="stylesheet" type="text/css" />

<link rel="shortcut icon" href="favicon.ico">

<link rel="icon" type="image/gif" href="favicon.gif">

</head>

<body link="#FF0000" vlink="#FF0000" alink="#FFFFFF">

<font color="#FFFFFF">

<div id="topPan">

<a href="index.html"><img src="images/BrainLogo.jpg" title="Brain-Host" alt="Brain-Host" width="219" height="58" border="0"  class="logo"/></a>

    <div id="topimagePan"><img src="images/blank.gif" alt="" /></div>

<div id="topimagePan"><img src="images/blank.gif" alt="" /></div>

<ul>

<li class="home">home</li>

<li><a href="about.html">about us</a></li>

<li><a href="forums.html">forums</a>| </li>

<li><a href="essay.php">essay uploads</li>

<li><a href="#">purchase</a>| </li>

<li><a href="contact.html">contact</a></li>

  </ul>

</div>

<?php

include 'dbc.php';

$user_email = mysql_real_escape_string($_POST['email']);

if ($_POST['Submit']=='Login')

{

$md5pass = md5($_POST['pwd']);

$sql = "SELECT id,user_email FROM users WHERE

            user_email = '$user_email' AND

            user_pwd = '$md5pass' AND user_activated='1'";

$result = mysql_query($sql) or die (mysql_error());

$num = mysql_num_rows($result);

    if ( $num != 0 ) {

        // A matching row was found - the user is authenticated.

      session_start();

  list($user_id,$user_email) = mysql_fetch_row($result);

// this sets variables in the session

$_SESSION['user']= $user_email; 

if (isset($_GET['ret']) && !empty($_GET['ret']))

{

header("Location: $_GET[ret]");

} else

{

header("Location: myaccount.php");

}

//echo "Logged in...";

exit();

    }

header("Location: login.php?msg=Invalid Login");

//echo "Error:";

exit();

}

?>

<link href="loginstyles.css" rel="stylesheet" type="text/css">

<?php if (isset($_GET['msg'])) { echo "<div class=\"msg\"> $_GET[msg] </div>"; } ?>

<p> </p><table width="40%" border="0" align="center" cellpadding="0" cellspacing="0">

  <tr>

    <td bgcolor="#590000" class="mnuheader" >

<div align="center"><font size="5"><strong>Login

        Members</strong></font></div></td>

  </tr>

  <tr>

    <td bgcolor="#590000" class="mnubody"><form name="form1" method="post" action="">

        <p> </p>

        <p align="center">Your Email

          <input name="email" type="text" id="email">

        </p>

        <p align="center"> Password:

          <input name="pwd" type="password" id="pwd">

        </p>

        <p align="center">

          <input type="submit" name="Submit" value="Login">

        </p>

        <p align="center"><a href="register.php">Register</a> | <a href="forgot.php">Forgot</a></p>

      </form></td>

  </tr>

</table>

</div>

<div id="bodyBottomPan">

  <div id="BottomLeftPan">

  </div>

  <div id="BottomMiddlePan">

  <p> </p>

<p class="more"></p>

  </div>

</div>

<div id="footerPan">

<ul>

<li><a href="index.html">home </a>| </li>

<li><a href="about.html">about us</a>| </li>

<li><a href="forums.html">forums</a>| </li>

<li><a href="essay.php">essay uploads</a>| </li>

<li><a href="#">purchase</a>| </li>

<li><a href="contact.html">contact</a></li>

</ul>

<p class="copyright">©brain-host. all right reserved.</p>

<div id="footerPanhtml"><a href="http://validator.w3.org/check?uri=referer" target="_blank">HTML</a></div>

    <div id="footerPancss"><a href="http://jigsaw.w3.org/css-validator/check/referer" target="_blank">CSS</a></div>

<ul class="templateworld">

  <li>design by:</li>

<li><a href="http://ladydee.net23.net/" target="_blank">LadyDee</a></li>

  </ul>

</div>

</font>

</body>

</html>

 

I have already checked and thtere is no white space in the code.  I am using code from the  book PHP and Web Development and getting the above error.

 

Is there another way to specify the header location? what can be done for this kind of problem?  Why would a book tell you to use code that can cause an error?

 

Thank you

LadyDee

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deemurphy Member

deemurphy

Posted
  • Author
Posted

One of the things I did was change that and when I did I get invalid login:

 

<?php

ob_start();

include 'dbc.php';

$user_email = mysql_real_escape_string($_POST['email']);

if ($_POST['Submit']=='Login')

{

$md5pass = md5($_POST['pwd']);

$sql = "SELECT id,user_email FROM users WHERE

            user_email = '$user_email' AND

            user_pwd = '$md5pass' AND user_activated='1'";

$result = mysql_query($sql) or die (mysql_error());

$num = mysql_num_rows($result);

    if ( $num != 0 ) {

        // A matching row was found - the user is authenticated.

      session_start();

  list($user_id,$user_email) = mysql_fetch_row($result);

// this sets variables in the session

$_SESSION['user']= $user_email; 

if (isset($_GET['ret']) && !empty($_GET['ret']))

{

header("Location: $_GET[ret]"); // redirect

} else

{

header("Location: myaccount.php");

}

//echo "Logged in...";

exit();

}

header("Location: login.php?msg=Invalid Login");

//echo "Error:";

exit();

}

?>

<!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=iso-8859-1" />

<title>Brain-Host Login</title>

<link href="style.css" rel="stylesheet" type="text/css" />

<link rel="shortcut icon" href="favicon.ico">

<link rel="icon" type="image/gif" href="favicon.gif">

</head>

<body link="#FF0000" vlink="#FF0000" alink="#FFFFFF">

<font color="#FFFFFF">

<div id="topPan">

<a href="index.html"><img src="images/BrainLogo.jpg" title="Brain-Host" alt="Brain-Host" width="219" height="58" border="0"  class="logo"/></a>

    <div id="topimagePan"><img src="images/blank.gif" alt="" /></div>

<div id="topimagePan"><img src="images/blank.gif" alt="" /></div>

<ul>

<li class="home">home</li>

<li><a href="about.html">about us</a></li>

<li><a href="forums.html">forums</a>| </li>

<li><a href="essay.php">essay uploads</li>

<li><a href="#">purchase</a>| </li>

<li><a href="contact.html">contact</a></li>

  </ul>

</div>

<link href="loginstyles.css" rel="stylesheet" type="text/css">

<?php if (isset($_GET['msg'])) { echo "<div class=\"msg\"> $_GET[msg] </div>"; } ?>

<p> </p><table width="40%" border="0" align="center" cellpadding="0" cellspacing="0">

  <tr>

    <td bgcolor="#590000" class="mnuheader" >

<div align="center"><font size="5"><strong>Login

        Members</strong></font></div></td>

  </tr>

  <tr>

    <td bgcolor="#590000" class="mnubody"><form name="form1" method="post" action="">

        <p> </p>

        <p align="center">Your Email

          <input name="email" type="text" id="email">

        </p>

        <p align="center"> Password:

          <input name="pwd" type="password" id="pwd">

        </p>

        <p align="center">

          <input type="submit" name="Submit" value="Login">

        </p>

        <p align="center"><a href="register.php">Register</a> | <a href="forgot.php">Forgot</a></p>

      </form></td>

  </tr>

</table>

</div>

<div id="bodyBottomPan">

  <div id="BottomLeftPan">

  </div>

  <div id="BottomMiddlePan">

  <p> </p>

<p class="more"></p>

  </div>

</div>

<div id="footerPan">

<ul>

<li><a href="index.html">home </a>| </li>

<li><a href="about.html">about us</a>| </li>

<li><a href="forums.html">forums</a>| </li>

<li><a href="essay.php">essay uploads</a>| </li>

<li><a href="#">purchase</a>| </li>

<li><a href="contact.html">contact</a></li>

</ul>

<p class="copyright">©brain-host. all right reserved.</p>

<div id="footerPanhtml"><a href="http://validator.w3.org/check?uri=referer" target="_blank">HTML</a></div>

    <div id="footerPancss"><a href="http://jigsaw.w3.org/css-validator/check/referer" target="_blank">CSS</a></div>

<ul class="templateworld">

  <li>design by:</li>

<li><a href="http://ladydee.net23.net/" target="_blank">LadyDee</a></li>

  </ul>

</div>

</font>

</body>

</html>

 

 

I checked the database and my user id and password and email address is there.

 

Thanks

LadyDee

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