php - php session 不起作用

我正在尝试使用一个会话来识别用户是否已登录。人们不能再使用url来登录，而是将他们重定向到mainlogin.html，尽管现在如果我输入正确的登录详细信息，我将被重定向回，如果我输入了错误的详细信息，它会通知我。我希望这不是重复的。我在表格中四处张望，尝试了其他人的方法，但这些方法对我没有用。checklogin.php<?phpsession_start();ob_start();$host="foo"; // Host name$username="bar"; // Mysql username$password=""; // Mysql password$db_name="foo";// Database name$tbl_name="bar"; // Table namemysql_connect("$host", "$username", "$password")or die("cannot connect");mysql_select_db("$db_name")or die("cannot select DB");$myusername=$_POST['myusername'];$mypassword=$_POST['mypassword'];$mypassword= sha1($mypassword);$myusername = stripslashes($myusername);$mypassword = stripslashes ($mypassword);$myusername = mysql_real_escape_string($myusername);$mypassword = mysql_real_escape_string($mypassword);$sql="SELECT * FROM $tbl_name WHERE myusername='$myusername' and mypassword='$mypassword'";$result=mysql_query($sql);$count=mysql_num_rows($result);if($count==1) { $_SESSION['myusername'] = $$myusername; $_SESSION['mypassword'] = $$mypassword; header("location:login_success.php");}else { //header('Location: ../mainlogin.html'); echo "Wrong Username or Password";}?><? ob_flush(); ?>login_success.php<?phpsession_start();// Check, if username session is NOT set then this page will jump to login pageif (!isset($_SESSION['myusername'])) { header('Location: ../mainlogin.html');}exit;?> 最佳答案 美元符号过多？$_SESSION['myusername'] = $$myusername;$_SESSION['mypassword'] = $$mypassword; ...应该是$_SESSION['myusername'] = $myusername;$_SESSION['mypassword'] = $mypassword;..ops ..在会话中存储密码不是一个好主意..最好像本教程所述session_register("myusername");session_register("mypassword");关于php - php session 不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20649494/