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How To Redirect Users.

chuflasky
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chuflasky Newbie

chuflasky

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Posted

Hi, this is not related to the book, i just need some help.

i being working in this script for the last past weeks and i still can't figured out. i still get redirected to the index page. I was wondering if i have to modified the login.php in order for the script to be executed.

the code below is what a came up with.

 

This is the script where i redirect the user if they are not logged in. 

 <?php 
session_start();

$page_name = $_SERVER['PHP_SELF'];
if(!isset($_SESSION['user_name'])  ){
	header("Location: login.php" . (isset($page_name)? '?page_name='. $page_name: '' ) ); 
	exit();


}//localhost/index2/user_php/login.php?page_name=/index2/user_php/myevents.php

else{ //end of this part
require_once "../include/header.php";
//need the data base connection to talk to the data base

   require_once("../mysqli_conn/db_conn.php");
//select the events fron the data base//
$query ="SELECT user_id, title_id, cat_id FROM events WHERE user_id = '$username' ";
   $result = mysqli_query($dbc, $query) or die("Error: " . mysqli_error($dbc) ) ;
$rows = mysqli_num_rows($result);
if($rows == 0){
  	echo "<p>You current have no events posted so far.</p>";
  	}else{

   		echo "<table cellspacing='3' cellpadding='3' width='50%'>";
 		while($rows = mysqli_fetch_array($result,MYSQLI_ASSOC) ){
 		echo '
   		<tr>
 			<td>Events Name:</td>
   			<td>' . $rows["name"]. '</td>
			</tr> ';

  	}
 	echo"  </table>";
  	}

}//end of else stament

include("../include/footer.html");
?>

 

 

 

Now, i get redirected to login_page_inc.php. the below script is what i got. 

 <?php include("../include/header.php");?>
<?php
/* 
*login_page_inc.php
*/
//this pega prints any errors associated with logging in
//and it create the entire login page, including the form.

///include the header

//print any errors message if they exist

///get the page url //this part goes in the header

 if(isset($_GET['page_name']) ){
$page_name = $_GET['page_name'];
}elseif(isset($_POST['page_name']) ){
$page_name= $_POST['page_name'];
}
//end of this part


//check to see if already logged in
if(isset($_SESSION['user_name']) ){
//redirect if page has a value.
if(isset($page_name) && strlen($page_name) >0){
       $url = $page_name;
	header("Location: $url");
	exit();
}else{
	//redirect to home page
	$url = "../index.php";
	header("location: $url");
	exit();
}

}


if(!empty($errors) ){
	echo "<div id='signIn_error_handler'>";
echo "<h2 class='error_2'>Error!</h2>
<p class='error_2'>The following error(s) occured:<br />";

foreach($errors as $msg){

	echo "  $msg<br />\n";		
}
echo "</p><p class='try_again'>Please Try again.</p><p><br /></p>";
echo"</div>";
}
?>
<!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>Sing In</title>
<link href="../css/php_style.css" rel="stylesheet" media="all" type="text/css" />

</head>

<body>
<div id="wrapper">


<h2 class="signIn_form">Sign In Form</h2>
<div id="user_signIn">

<div id="image">
<img src="../images/user-security.png" />
</div><!--end of image -->

<table cellpadding="3" cellspacing="3" width="50%">
<tr>
<form action="login.php" method="post" >
<tr>
<td><p>User Name:</p></td>
<td><input type="text" name="username" maxlength="30" value="<?php if(isset($_POST['username']) )echo $_POST['username'] ?>" />
</td>
 </tr>
 <tr> 
   <td><p>Password:</p></td>
	<td><input type="password" name="password" maxlength="15" />
	</td>
	</tr>
	<tr>
   <td>
   <input type="hidden" name="page_name" value="<?php  echo $_POST['page_name']; ?>"  />
   <input  type="hidden" name="page_name" value="<?php  echo  $_GET['page_name']; ?> "  />
   <input type="hidden" name="submitted" value="TRUE" />    
   <input type="submit" name="submit" value="Sign In" />
  </td>
 </tr>
</form>
</tr>
</table>
</div><!--end of user_signIn -->

</div><!--end of wrapper -->

</body>
</html>
<?php include("../include/footer.html");?>

 

 

And when i view page source, the hidden field with the $_GET variable has the value from which it came from. But still get redirected to the index.php.

I was wondering if the login_function_inc.php and login.php has to be modified. and the reason that i think so, is because the form is being process by the login.php.

and in the login.php below.

 

 <?php
/*
*login.php
*this page processes the login form submissin.
*upon succeful login, the user is redirected.
*two include file are necessary.
*set nothin to the web browser prion to the set cookie() line!
*/

//chech if the form has been submitted
if(isset($_POST['submitted']) ){


	//for processing the login
require_once("login_function_inc.php");


//need the data base connection:
require_once("../mysqli_conn/db_conn.php");



list($check, $data) = check_login($dbc,$_POST["username"],$_POST["password"]);

if($check){// if ok	
  		session_start();
  		$_SESSION['member_id'] = $data["member_id"];
  		$_SESSION['user_name'] = $data["user_name"];


  		$_SESSION['agent'] = md5($_SERVER['HTTP_USER_AGENT']);

 		/*setcookie('member_id',$data['member_id'], time()+3600*24*7*365, '/','', 0, 0 );
 		setcookie('user_name', $data['user_name'], time()+3600*24*7*365, '/','',0 ,0);
 		*/
 		//redirect
		$url = absolute_url("../index.php"); 
		header("Location: $url");
		exit();//quit the scrip   		

		}
		else{ //unsuccessful!
  	//assign $data to $errors for error reporting
  	//in the login_page_inc.php.
  	$errors = $data;	
}


mysqli_close($dbc);// close the data base connection
}//end of if submitted

//creat the page:
include("login_page_inc.php");
?>

 

 

As i point in red from about that the redirection already set, if i change that to $url = absolute_url($page_name); and remove the code dirname($_SERVER['PHP-SELF']) to just $url ='http://' . $_SERVER['HTTP-HOST']; in the login_function_inc.php script, it redirect me back to the requested page, but when i try to login normally, it take me to XAMPP main page.

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  • 2 weeks later...
chuflasky Newbie

chuflasky

Posted
  • Author
Posted

Problem solve. posting solution for the benefit of others.

 

 

1: in the page that i want to redirect back i create a variable that store the current page URL. then i add that variable to the header that take the user to the login_page if they are not logged in.

 $page_name = $_SERVER['PHP-SELF'];
if(!isset($_SESSION['user_name'])){
		header("Location: login_page_inc.php" . (isset($page_name)? '?page_name=' . $page_name : '') );
}

 

After being taken to the login_page_inc.php, retrieve the URL that the page came from using a hidden field in the login_page_inc.php.

 <input type = "hidden" name="page_name" value="<?php echo $_GET['page_name']; ?>" />

 

Now and this is the most important. in the login.php not the login_page.inc.php on page 338 of the book PHP 6 AND MYSQL5 'Larry ullman', line 26 to 29 i made the following changes.

 if(isset($page_name)){
$url = page_name;
header("Location: $page_name");
$url = absolute_url("../index.php");
header("Location: $url" , false);
exit();
}

I referred to the book for the benefit of the google search engine.

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Larry Explorer

Larry

Posted
Posted

Sorry, Jorge, that I didn't get you an answer. There was a ton of code to review, so I put it on my watch list to get back to it and...apparently I never did. Sorry about that. Kudos for figuring it out and thanks for posting the solution.

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