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9.3

Dreamweaver CS4 PHP MySQL Login Page

Asked by alexking in Adobe Dreamweaver, PHP and Databases

Tags: PHP MySQL Dreanweaver Session Variables

I am having trouble with Session Variables in Dreamweaver. I have created a simple login page which authenticates via a MySQL database table. I would like the main.php page to greet by username (and eventually first name) on successful login.

Following Adobe's instructions, I tried setting a Session Variable called MM_Username in the Bindings panel but this did not do very much and does not display the username when dragged on screen.

Do I need to link this Session Variable to the username text box in the form on the first page (login.php)? This should be so simple, what am I missing?

Thanks. 
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//login.php
 
<?php require_once('Connections/client.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }
 
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
 
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
  session_start();
}
 
$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}
 
if (isset($_POST['username'])) {
  $loginUsername=$_POST['username'];
  $password=$_POST['password'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "main.php";
  $MM_redirectLoginFailed = "loginfailed.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_client, $client);
  
  $LoginRS__query=sprintf("SELECT username, password FROM clients WHERE username=%s AND password=%s",
    GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 
   
  $LoginRS = mysql_query($LoginRS__query, $client) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";
    
    //declare two session variables and assign them
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;	      
 
    if (isset($_SESSION['PrevUrl']) && false) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}
?>
<!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>Login</title>
</head>
 
<body>
<form id="form1" name="form1" method="POST" action="<?php echo $loginFormAction; ?>">
  <p>
    <label>User Name
      <input name="username" type="text" id="username" size="24" />
    </label>
  </p>
  <p>
    <label>Password
      <input name="password" type="password" id="password" size="25" />
    </label>
  </p>
  <p>&nbsp;</p>
  <p>
    <input type="submit" name="login" id="login" value="Login" />
  </p>
</form>
<p>&nbsp;</p>
</body>
</html>
 
//main.php
 
<?php
if (!isset($_SESSION)) {
  session_start();
}
 
$MM_authorizedUsers = "";
$MM_donotCheckaccess = "true";
 
// *** Restrict Access To Page: Grant or deny access to this page
function isAuthorized($strUsers, $strGroups, $UserName, $UserGroup) { 
  // For security, start by assuming the visitor is NOT authorized. 
  $isValid = False; 
 
  // When a visitor has logged into this site, the Session variable MM_Username set equal to their username. 
  // Therefore, we know that a user is NOT logged in if that Session variable is blank. 
  if (!empty($UserName)) { 
    // Besides being logged in, you may restrict access to only certain users based on an ID established when they login. 
    // Parse the strings into arrays. 
    $arrUsers = Explode(",", $strUsers); 
    $arrGroups = Explode(",", $strGroups); 
    if (in_array($UserName, $arrUsers)) { 
      $isValid = true; 
    } 
    // Or, you may restrict access to only certain users based on their username. 
    if (in_array($UserGroup, $arrGroups)) { 
      $isValid = true; 
    } 
    if (($strUsers == "") && true) { 
      $isValid = true; 
    } 
  } 
  return $isValid; 
}
 
$MM_restrictGoTo = "loginfailed.php";
if (!((isset($_SESSION['MM_Username'])) && (isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'], $_SESSION['MM_UserGroup'])))) {   
  $MM_qsChar = "?";
  $MM_referrer = $_SERVER['PHP_SELF'];
  if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
  if (isset($QUERY_STRING) && strlen($QUERY_STRING) > 0) 
  $MM_referrer .= "?" . $QUERY_STRING;
  $MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" . urlencode($MM_referrer);
  header("Location: ". $MM_restrictGoTo); 
  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=UTF-8" />
<title>Main</title>
</head>
 
<body>
<h1>Welcome </h1>
<p><?php echo $_COOKIE['MM_Username']; ?></p>
<p>&nbsp;</p>
</body>
</html>
[+][-]07/30/09 04:07 PM, ID: 24985173

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About this solution

Zones: Adobe Dreamweaver, PHP and Databases
Tags: PHP MySQL Dreanweaver Session Variables
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Solution Provided By: jason1178
Participating Experts: 1
Solution Grade: A
 
 
[+][-]07/30/09 11:57 PM, ID: 24986821

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