Question

我正在制作login.php，如果成功，将转到home.php。我想使用$ _SESSION，这是我的代码：

的login.php

<?php require_once('Connections/conn.php'); ?>
<?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 $theValue;
}
}
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
  session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['username'])) {
  $loginUsername=$_POST['username'];
  $password=$_POST['pass'];
  $MM_fldUserAuthorization = "username";
  $MM_redirectLoginSuccess = "home.php";
  $MM_redirectLoginFailed = "login.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_conn, $conn);

  $LoginRS__query=sprintf("SELECT username, pass, username FROM member WHERE username=%s AND pass=%s",
  GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 

  $LoginRS = mysql_query($LoginRS__query, $conn) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {

    $loginStrGroup  = mysql_result($LoginRS,0,'username');

    //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 );
  }
}
?>
<html>
<head>
    <title>session</title>
</head>

<body>
<form method="POST" action="<?php echo $loginFormAction; ?>">
    Please enter you name:
  <input type="text" id="username" name="username" />
    <input type="password" id="pass" name="pass" />

<input type="submit" value="Login" />
    </form>
</body>
</html>

这是我的 HOME.php

<?php 
session_start();

?>

<html>
    <head>
    <title>welcome</title>
    </head>

    <body>
    <h1>Thnx for signing in</h1>
    <?php
    echo "Welcome" . " " . $_POST['username'];
    $_SESSION['chorva'] = $_POST['username'];




    ?>

    </body>
</html>

我有用户名作为我的文本框名称，这就是我在home.php上的内容，但为什么它总是说我有一个未定义的索引？

请某人帮助我？

Answer 1

您需要使用

<?php 
session_start();

?>

<html>
    <head>
    <title>welcome</title>
    </head>

    <body>
    <h1>Thnx for signing in</h1>
    <?php
    echo "Welcome" . " " . $_SESSION['MM_Username'];
    $_SESSION['chorva'] = $_SESSION['MM_Username'];




    ?>

    </body>
</html>

由于您已在login.php中为会话用户名定义$ _SESSION ['MM_Username']

Answer 2

更改此行：

echo "Welcome" . " " . $_POST['username'];

到

echo "Welcome" . " " . isset($_POST['username']) ? $_POST['username'] : '';

Answer 3

这是因为$_POST['username']不存在，当你将他重定向到另一个页面时它总是空的，而我看到你为会话分配了他的用户名，你可以这样做：

也许你想要这样的东西：

<?php
    if(isset($_SESSION['MM_Username'])){
        echo "Welcome ".$_SESSION['MM_Username'];
    }
?>

（！）注意：未定义的索引：第15行的C：\ wamp \ www \ HavenInWonderland \ home.php中的用户名

3 个答案: