session variables help

scmeeker · June 19, 2010

I'm trying to get the username from a login form to carry over to the next page and have the username show on top of the next using the session variables. I'll show my page in sections:

At the top of the php part I have:

<?php
session_start();
session_register ("username");
$HTTP_SESSION_VARS ["username"] = $username;

Then at the top of the html section I have:

<?php echo "$username" ?>

There are no errors but nothing is showing up when I login successfully. Any ideas? Any help with session variable is greatly appreciated because I'm new to PHP and have been looking and looking on the web without success.

Thanks!

Pikachu2000 · June 19, 2010

$_SESSION['username'] = 'value';

echo $_SESSSION['username'];

scmeeker · June 19, 2010

$_SESSION['username'] = 'value';

When you say 'value', do I put that in the way it is or does it need to be changed because it is still coming up blank? Thanks.

scmeeker · June 19, 2010

I know this must sound ridiculous but am I supposed to have session variable at the top of my "login page"? Just thought of that.

Pikachu2000 · June 19, 2010

Oh, you still need to have session_start() at the beginning of each script that will use $_SESSIONS. Sorry about that.

'value' is that value that is being assigned to $_SESSION['username']. It can be whatever you need it to be, just like any other variable.

scmeeker · June 19, 2010

Okay, at the top of my page I put:

<?php

session_start();

$_SESSION['username'] = 'username';

because I assume that the value is "username"?

And then in the HTML code I put:

<?php echo $_SESSION['username']; ?>

When this is in, it simply prints out "username" literally and not the actual username. Hmmmm...and I've tried it several different ways....without luck.

kenrbnsn · June 19, 2010

If you want the value in the session variable you have to put it there.

<?php
$_SESSION['username'] = $username;
?>

Ken

scmeeker · June 19, 2010

Okay, I tried that without luck still. Here is the code for part of the user login form dealing with the input values:

<td>

<tr>

</tr>

<tr>

<td width="78">Username</td>

</tr>

<tr>

<td>Password</td>

</tr>

<tr>

</tr>

And then at the top of the next page I've put:

<?php
session_start();
$_SESSION['username'] = $username;

and in the HTML section put:

<?php echo $_SESSION['username'];?>

and I also tried:

<?php echo $_SESSION[$username];?>

and:

<?php echo $username;?>

with none of those working yet.

trq · June 19, 2010

You haven't defined $username anywhere.

<?php
session_start();
$_SESSION['username'] = $_POST['username'];

scmeeker · June 19, 2010

I'm still having no luck with this. I'm going to post more, as I realized I didn't post another file that may help.

Here is the user login form:

<?php session_start();
$_SESSION['username'] = $_POST['username'];?>

<!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>Art</title>
<link href="styles/lery2.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
a:link {
color: #09C;
text-decoration: none;
}
a:visited {
text-decoration: none;
color: #09C;
}
a:hover {
text-decoration: underline;
}
a:active {
text-decoration: none;
}
-->
</style></head>
<div align="center">
<body>


<div class="mainbody">
  <div class="header1"></div>
  
  <div class="storeeditleftsidebar"><br />
<br />


</div>
  <br />
<br />
<br />
<br />
<span class="titlefont">Member sign in </span><br />
<span class="blackfont"><br />
sign in here. </span><br />
<br />
<table width="300" border="0" align="left" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="post" action="checklogin.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"></td>
</tr>
<tr>
<td width="78">Username</td>
<td width="6">:</td>
<td width="294"><input name="username" type="text" id="username"</td>
</tr>
<tr>
<td>Password</td>
<td>:</td>
<td><input name="password" type="password" id="password"></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</td>
</form>
</tr>
</table>

Then the reference file for the form where it says"action = checklogin.php" is here:

<?php
session_start();



$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name=""; // Database name
$tbl_name="artist"; // Table name

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// username and password sent from form
$myusername=$_POST['username'];
$mypassword=$_POST['password'];

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("username");
session_register("password");
header("location:listtest5.php");
}
else {
header ("location:userlogin_error.php");
}
?>

Then there is the page where the session variable "username" is being sent and printed:

<?php
session_start();



//connect to database
$mysqli = mysqli_connect("", "", "", "");



  //Set the selected category
$selected_cat = (isset($_GET["cat_id"])) ? $_GET["cat_id"] : false;

//show categories first
$get_cats_sql = "SELECT cat_id, cat_title FROM category ORDER BY cat_id";
$get_cats_res =  mysqli_query($mysqli, $get_cats_sql) or die(mysqli_error($mysqli));

if (mysqli_num_rows($get_cats_res) < 1)
{
   $categoryList = "<p><em>Sorry, no categories to browse.</em></p>";
}
else
{
    //Display the categories
    while ($cats = mysqli_fetch_array($get_cats_res))
    {
        $categoryList .= "<a href=\"{$_SERVER['PHP_SELF']}?cat_id={$cats['cat_id']}\">{$cats['cat_title']} <br /></a>\n";
        if ($cats['cat_id']==$selected_cat)
        {
            //get items
            $get_items_sql = "SELECT id, photo, username, title, price, date FROM product WHERE cat_id = '{$selected_cat}' ORDER BY date $pages->limit";
            $get_items_res = mysqli_query($mysqli, $get_items_sql) or die(mysqli_error($mysqli));
            if (mysqli_num_rows($get_items_res) < 1)
            {
                $content = "<p><em>Sorry, no items in this category.</em></p>\n";
            }
            else
            {
                $content .= "<ul>\n";
                while ($items = mysqli_fetch_array($get_items_res))
                {
                    $item_url = "items3.php?id={$items['id']}";
                    $item_title = stripslashes($items['title']);
                    $item_price = $items['price'];
                    $item_photo = $items['photo'];
                    $item_username = $items['username'];
                    $item_date = $items['date'];
                    $content .= "";
              list($width) = getimagesize($item_photo);
  // set the maximum width of the image here
  $maxWidth = 100;
  if ($width > $maxWidth);
             
             
                    $content .= "<table width=\"603\" border=\"0\"><tr><td width=\"101\"> <a href=\"{$item_url}\">
                    <img alt=\"Image\" border=0 width=\"{$maxWidth}\" src=\"{$item_photo}\" /></a><td width=\"201\">      <a href=\"{$item_url}\">{$item_title}</a></td>
                    <td width=\"109\">{$item_username}</td><td width=\"101\"> {$item_date}</td><td width=\"99\">      \${$item_price} USD </td></tr></table>";
                    $content .= "\n";
                
                }
  
                $content .= "</ul>\n";
            }
         }  
    }
}

?>

  <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Art</title>
<link href="styles/sgallery2.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
a:link {
color: #09C;
text-decoration: none;
}
a:visited {
text-decoration: none;
color: #09C;
}
a:hover {
text-decoration: underline;
}
a:active {
text-decoration: none;
}
-->
</style></head>
<div align="center">
<body>


<div class="mainbody">
  <div class="header1">
  [color=red]<?php echo $_SESSION['username']; ?>[/color]</div>
  <div class="leftsidebar"><span class="titles">    Art Categories</span><br />
    <br />
    <?php echo $categoryList; ?>
    <br />

swisse · June 19, 2010

In the user login form delete the line which says:

$_SESSION['username'] = $_POST['username'];

You don't need that yet.

Then in the checklogin.php file change the line which says:

if($count==1){

// Register $myusername, $mypassword and redirect to file "login_success.php"

session_register("username");

to:

if($count==1){

// Register $myusername, $mypassword and redirect to file "login_success.php"

$_SESSION['username'] = $myusername;

This way you have set the $_SESSION['username'] once you've succesfully logged in. You can call this $_SESSION variable in any php file in which you start a session.

scmeeker · June 20, 2010

Thank you...thank you...thank you...swisse! It worked! I was struggling and struggling with that one for several hours yesterday until I just crashed and decided to come back to it today with a refreshed mind. Glad I did. Thank you.

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session variables help

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