[Resolved] [Resolved] Help!! Header problem...

wendymelon

I have been told that the header must be used before the html outputs. Therefore, I've changed the arrangement to the codes below. However, my problem still does not resolve. Can anybody help me?

CODES:

<?php if(isset($_POST['btnLogin']))
                              {
                                  //error_reporting(E_ALL);
                                  $db_host="localhost";
                                  $mysql_database="dbtest01";
                                  $link = mysql_connect("localhost") or die("Unable connect to MySQL Server");
                                  mysql_select_db($mysql_database, $link) or die("Unable to select database");


                              if(isset($_POST['Password']))
                                  {$EmpID= $_POST['EmpID'];
                                  $password = $_POST['Password'];

                                  $query ="SELECT * FROM SUPERVISOR WHERE Supervisor_ID='$EmpID' AND Password='$password';";
                                  $result = mysql_query($query);
                                  if(mysql_num_rows($result))
                                  {
                                      //echo "<font color=#FFFFFF><Center><b>**Successful Login**</b></Center></font>" ;
                                      header('Location:[url]http://localhost/main.php[/url]');
                                      //echo '<script language="Javascript">';
                                      //echo 'window.location="http://localhost/main.php"';
                                      // echo '</script>';

                                      exit;
                                  }

                                  else
                                      {echo "<font color=#ffffff><Center><b>**Failed Login**</b></Center></font>";}
                                  mysql_close();
                              }
                              else
                              {echo "<font color=#ffffff><Center><b>**No login attempted**</b></Center></font>";}
                      }
                     ?>
<html> 
<! --- Generated by Selida 04-30-2004 --- !>

<head>
<title>Employee Overtime System Login</title>
</head>

<body bgcolor="#663366" link="#0000FF" text="#FFCCFF" alink="#FF0000" vlink="#FF00FF">
<p> &nbsp </p>
<p> &nbsp </p>
<p> &nbsp </p>


<p align="center"><font size="7" style="Arial Black"> Supervisor EOT Login</font></p>
<form name="frmLogin" method="post" >
<table border="4" bgcolor="#FFCCFF" align="center" cellpadding="0" width="51%" bordercolor="#663399">
       <tr>
           <td>
               <table width="100%" height="225" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#66FFFF">
                      <tr><td bgcolor="663399">
                      <p>&nbsp</p>
                                  <table width="84%" height="70" bgcolor="#663399" border="0" align="center" cellpadding="0" cellspacing="0">
                                         <tr>
                                             <td width="34%" height="37%"><div align="left">
                                                    <font size="4"> Employee ID :</font></div>
                                             </td>
                                             <td width= "60%"><input type="text" tabindex="0" name="EmpID">
                                             </td>
                                         </tr>

                                     <tr>
                                         <td height="100%"> <font size="4"> Password :</font></td>
                                         <td width="60%"> <input type="password" tabindex="" name="Password"><td>
                                     </tr>
                                     </table>
                    <p align="center">
                    <input align="center" name="login" tabindex="" type="submit" id="btnLogin" value="Login" style="font-family:verdana,arial,helvetica; font-size:10pt; height:25; width:140; background:#99CCFF; border:2  solid #663366; cursor:hand">







                    </p>
                    </td></tr>
           </table>
    </td></tr>
</table>
</form>

</body>
</html>

Merve

Um...what's your problem?

wendymelon

It doesn't redirect to the main.php

Frederick

Wrong
header('Location:<a href="http://localhost/main.php" target="_blank">http://localhost/main.php</a>');

Correct
header("Location: main.php");

wendymelon

It still doesn't work after I change it to

header("Location: main.php");

I even tried

echo '<script language=javascript>location.replace("main.php")</script>';

Frederick

Create a page called for an example Log.php and have all your login process accomplished in that page and redirect back for failures or success. Use the following header() for example of redirect.

In your main.php page somewhere you choose, place the following

wendymelon

I don't understand what you meant. Can you help me to restructure my code. Sorry to create such a hazard. Thank you very much if you could help.

wendymelon

the error of this problem is

Cannot modify header information - headers already sent by (output started at C:\Program Files\Apache Group\Apache2\htdocs\test1.php:12) in C:\Program Files\Apache Group\Apache2\htdocs\test1.php on line 25

Frederick

Example of a login page

<?php
include("databaseConn.php");
// $login comes from your form submit button name
if (isset($login)) {
	if (empty($username) || empty($password)) {
		// if empty fields
		header("Location: main.php?back=1");
	} else {
		$sql = mysql_query("SELECT * FROM tablename WHERE username='$username' AND password='$password' ")
		or die(mysql_error());
		if (mysql_num_rows($sql)) {
			// if you want to have a cookie set
			$cookieName = "TEMP";
			setCookie($cookieName,'1',time()+(3600),'/','',0);

		// if success
		header("Location: main.php?back=2");
	} else {
		// if failure
		header("Location: main.php?back=3");
	}
}
}
?>

From the script aboove, you see the header items. Those will send you back to the main.php page with its condition.

<?php
// if successful login, display here
if ($back == 2) {
	echo "Successful Login";
} else {
	// if empty fields or failure
	if ($back == 1) { echo "All fields required"; }
	else if ($back == 3) { echo "Login Failure, Try again"; }
?>
<!-- START FORM HERE
Display form here
END FORM HERE -->
<?php } ?>

wendymelon

I have the error:

Notice: Undefined variable: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 3

Notice: Undefined variable: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 7

Notice: Undefined variable: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 8

which refers to the variable $back

Here are my codes
main.php:

<html>
<head>
<title>Employee Overtime System Login</title>
</head>

<body bgcolor="#663366" link="#0000FF" text="#FFCCFF" alink="#FF0000" vlink="#FF00FF">
<p> &nbsp </p>
<p> &nbsp </p>
<p> &nbsp </p>
<?php
// if successful login, display here
   if ($back == 2) {
    echo "Successful Login";
} else {
    // if empty fields or failure
    if ($back == 1) { echo "All fields required"; }
    else if ($back == 3) { echo "Login Failure, Try again"; }
}
?>

<p align="center"><font size="7" style="Arial Black"> Supervisor EOT Login</font></p>
<form name="frmLogin" method="post" >
<table border="4" bgcolor="#FFFFFF" align="center" cellpadding="0" width="51%" bordercolor="#663399">
       <tr>
           <td>
               <table width="100%" height="225" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#66FFFF">
                      <tr><td bgcolor="663399">
                      <p>&nbsp</p>
                                  <table width="84%" height="70" bgcolor="#663399" border="0" align="center" cellpadding="0" cellspacing="0">
                                         <tr>
                                             <td width="34%" height="37%"><div align="left">
                                                    <font size="4"> Employee ID :</font></div>
                                             </td>
                                             <td width= "60%"><input type="text" tabindex="0" name="EmpID">
                                             </td>
                                         </tr>

                                     <tr>
                                         <td height="100%"> <font size="4"> Password :</font></td>
                                         <td width="60%"> <input type="password" tabindex="" name="Password"><td>
                                     </tr>
                                     </table>
                    <p align="center">
                    <input align="center" name="login" tabindex="" type="submit" id="btnLogin" value="Login" style="font-family:verdana,arial,helvetica; font-size:10pt; height:25; width:140; background:#99CCFF; border:2  solid #663366; cursor:hand">







                    </p>
                    </td></tr>
           </table>
    </td></tr>
</table>
</form>

</body>
</html>

and my test2.php

<?php
     include("main.php");
     $db_host="localhost";
     $mysql_database="dbtest01";
     $link = mysql_connect("localhost") or die("Unable connect to MySQL Server");
     mysql_select_db($mysql_database, $link) or die("Unable to select database");

// $login comes from your form submit button name
if (isset($btnLogin)) {
    if (empty($EmpID) || empty($Password)) {
        // if empty fields
        header("Location: main.php?back=1");
    } else {
        $sql = mysql_query("SELECT * FROM SUPERVISOR WHERE Supervisor_ID='$EmpID' AND Password='$password' ")
        or die(mysql_error());
        if (mysql_num_rows($sql)) {
            // if you want to have a cookie set
            //$cookieName = "TEMP";
            //setCookie($cookieName,'1',time()+(3600),'/','',0);

        // if success
        header("Location: main.php?back=2");
    } else {
        // if failure
        header("Location: main.php?back=3");
    }
}
}
?>

How should I resolve the problem?

Frederick

Well the header() is working, so now it sounds like your register globals are Off

So you will have to use:

if ($_GET['back'] == 1) {

wendymelon

it still gives me the same error:

Notice: Undefined index: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 13

Notice: Undefined index: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 17

Notice: Undefined index: back in C:\Program Files\Apache Group\Apache2\htdocs\main.php on line 18

my code: main.php

<html>
<head>
<title>Employee Overtime System Login</title>
</head>

<body bgcolor="#663366" link="#0000FF" text="#FFCCFF" alink="#FF0000" vlink="#FF00FF">
<p> &nbsp </p>
<p> &nbsp </p>
<p> &nbsp </p>
<?php
// if successful login, display here

   if ($_GET['back'] == 2) {
    echo "Successful Login";
} else {
    // if empty fields or failure
    if ($_GET['back']==1) { echo "All fields required"; }
    else if ($_GET['back']==3) { echo "Login Failure, Try again"; }
}
?>

<p align="center"><font size="7" style="Arial Black"> Supervisor EOT Login</font></p>
<form name="frmLogin" method="post" >
<table border="4" bgcolor="#FFFFFF" align="center" cellpadding="0" width="51%" bordercolor="#663399">
       <tr>
           <td>
               <table width="100%" height="225" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#66FFFF">
                      <tr><td bgcolor="663399">
                      <p>&nbsp</p>
                                  <table width="84%" height="70" bgcolor="#663399" border="0" align="center" cellpadding="0" cellspacing="0">
                                         <tr>
                                             <td width="34%" height="37%"><div align="left">
                                                    <font size="4"> Employee ID :</font></div>
                                             </td>
                                             <td width= "60%"><input type="text" tabindex="0" name="EmpID">
                                             </td>
                                         </tr>

                                     <tr>
                                         <td height="100%"> <font size="4"> Password :</font></td>
                                         <td width="60%"> <input type="password" tabindex="" name="Password"><td>
                                     </tr>
                                     </table>
                    <p align="center">
                    <input align="center" name="login" tabindex="" type="submit" id="btnLogin" value="Login" style="font-family:verdana,arial,helvetica; font-size:10pt; height:25; width:140; background:#99CCFF; border:2  solid #663366; cursor:hand">







                    </p>
                    </td></tr>
           </table>
    </td></tr>
</table>
</form>

</body>
</html>

my code:test2.php

<?php
     include("main.php");
     $db_host="localhost";
     $mysql_database="dbtest01";
     $link = mysql_connect("localhost") or die("Unable connect to MySQL Server");
     mysql_select_db($mysql_database, $link) or die("Unable to select database");

// $login comes from your form submit button name
if (isset($btnLogin)) {
    if (empty($EmpID) || empty($Password)) {
        // if empty fields
        header("Location: main.php?back=1");

} else {
    $sql = mysql_query("SELECT * FROM SUPERVISOR WHERE Supervisor_ID='$EmpID' AND Password='$password' ")
    or die(mysql_error());
    if (mysql_num_rows($sql)) {
        // if you want to have a cookie set
        //$cookieName = "TEMP";
        //setCookie($cookieName,'1',time()+(3600),'/','',0);

        // if success
        header("Location: main.php?back=2");
        exit;
    } else {
        // if failure
        header("Location: main.php?back=3");
        exit;
    }
}
}
?>

Frederick

Not sure what else is up, those scripts do work. I use that method all the time for variable checking.

Using the header() examples I showed you and using the variable $back.

Don't know what else to tell you.

in this page is where an example of where I use it here

http://ronfrederick.com/index.php?page=Services/Process_Plan&plan=5&firstName=&lastName=&address=&apt=&city=&state=&zipcode=&phone=&email=&domain=&information=&back=1

This is returned if empty fields

wendymelon

Since i have 2 files :main.php, test2.php

Which file should I include the php?

say..maybe..
In main.php, include test2.php
or...in test2.php, include main.php