Why it always say: Undefined index: User
It always says the same error even I defined the user variable. I used this so that it can print the user name of the user and other details of the user who logged in a restricted page.
Code when logging in:
<?php require_once('../Connections/Intranet.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
....
}
mysql_select_db($database_Intranet, $Intranet);
$query_Recordset1 = "SELECT * FROM useraccounts";
$Recordset1 = mysql_query($query_Recordset1, $Intranet) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
?><?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['User'])) {
$loginUsername=$_POST['User'];
$password=$_POST['Password'];
$MM_fldUserAuthorization = "Restriction";
$MM_redirectLoginSuccess = "Admin.php";
$MM_redirectLoginFailed = "login.php";
$MM_redirecttoReferrer = false;
mysql_select_db($database_Intranet, $Intranet);
$LoginRS__query=sprintf("SELECT UserName, Password, Restriction FROM useraccounts WHERE UserName=%s AND Password=%s",
GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));
$LoginRS = mysql_query($LoginRS__query, $Intranet) or die(mysql_error());
$loginFoundUser = mysql_num_rows($LoginRS);
if ($loginFoundUser) {
$loginStrGroup = mysql_result($LoginRS,0,'Restriction');
//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>Untitled Document</title>
</head>
<body>
<form id="form1" name="form1" method="POST" action="<?php echo $loginFormAction; ?>">
<label>User Name:</label>
<input type="text" name="User" id="User" />
<p>
<label>Password :
<input type="password" name="Password" id="Password" />
</label>
</p>
<p>
<label>
<input type="submit" name="Login" id="Login" value="Login" />
</label>
</p>
<p> </p>
</form>
</body>
</html>
<?php
mysql_free_result($Recordset1);
?>
Code on the user page:
<?php require_once('../Connections/Intranet.php'); ?><?php
//initialize the session
if (!isset($_SESSION)) {
session_start();
}
// ** Logout the current user. **
$logoutAction = $_SERVER['PHP_SELF']."?doLogout=true";
if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")){
$logoutAction .="&". htmlentities($_SERVER['QUERY_STRING']);
}
if ((isset($_GET['doLogout'])) &&($_GET['doLogout']=="true")){
//to fully log out a visitor we need to clear the session varialbles
$_SESSION['MM_Username'] = NULL;
$_SESSION['MM_UserGroup'] = NULL;
开发者_StackOverflow $_SESSION['PrevUrl'] = NULL;
unset($_SESSION['MM_Username']);
unset($_SESSION['MM_UserGroup']);
unset($_SESSION['PrevUrl']);
$logoutGoTo = "login.php";
if ($logoutGoTo) {
header("Location: $logoutGoTo");
exit;
}
}
?>
<?php
if (!isset($_SESSION)) {
session_start();
}
$MM_authorizedUsers = "ADMIN";
$MM_donotCheckaccess = "false";
// *** Restrict Access To Page: Grant or deny access to this page
function isAuthorized($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 == "") && false) {
$isValid = true;
}
}
return $isValid;
}
$MM_restrictGoTo = "User.php";
if (!((isset($_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: ". $MM_restrictGoTo);
exit;
}
?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
$theValue = get_magic_quotes_gpc() ? stripslashes($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 $theValue;
}
}
mysql_select_db($database_Intranet, $Intranet);
$query_Recordset1 = "SELECT * FROM useraccounts WHERE UserName = '" .
mysql_real_escape_string($_POST["User"]) . "'";
$Recordset1 = mysql_query($query_Recordset1, $Intranet) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
?>
<!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>Untitled Document</title>
</head>
<body>
<table width="200" border="0">
<tr>
<td>Name:</td>
<td><?php echo $row_Recordset1['UserName']; ?></td>
</tr>
<tr>
<td>Restriction:</td>
<td><?php echo $row_Recordset1['Restriction']; ?></td>
</tr>
<tr>
<td>Division:</td>
<td><?php echo $row_Recordset1['Division']; ?></td>
</tr>
</table>
<p><?php print_r($_POST) ?>; </p>
<p> <a href="<?php echo $logoutAction ?>">Log out</a></p>
</body>
</html>
<?php
mysql_free_result($Recordset1);
?>
The input name is User not UserName.
This should work:
$query_Recordset1 = "SELECT * FROM useraccounts WHERE UserName = '" .
mysql_real_escape_string($_POST["User"]) . "'";
In your login form, you wrote:
<input type="text" name="User" id="User" />
However at your back end code, you wrote:
$_POST['UserName']
instead of
$_POST['User']
If you're still getting the same error, then you didn't define that variable.
error_reporting(E_ALL);
$post = array( 'color' => 'blue' );
echo $post['color']; // "blue"
echo $post['food']; // Undefined index: food
Try var_dump($_POST). Is the "User" key defined?
PHP is case sensitive. MySQL is case sensitive on certain OSes (eg. Linux), but not on others. Perhaps it has something to do with that?
加载中,请稍侯......
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