在 Php isset() 方面需要帮助

Question

所以，我做了一个网站和它的登录系统。有一个登陆页面、一个 "New post" 页面和一个登录页面。我不希望用户在未登录的情况下访问 "New post" 页面 [已解决]，但是，如果他尝试在没有会话的情况下访问它，它将使用 /login/ 将他重定向到登录页面？新的。当他在地址栏中使用 ?new 登录时，它应该将他重定向到 "New post" 页面，如果 url 只是 /login/，它会将他带到登陆页面。那是我尝试做的代码：

  if( $count == 1 && $row['userPass']==$password && isset($_POST["new"]) )  {
    $_SESSION['user'] = $row['userId'];
    header('Location:../new');
} else if ($count == 1 && $row['userPass']==$password) {
    $_SESSION['user'] = $row['userId'];
    header('Location:../');
}
  else {
    $errMSG = "Incorrect Credentials, Try again...";
}

这是完整的代码：

<?php
 ob_start();
 session_start();
 require_once 'dbconnect.php';

 $error = false;
 if( isset($_POST['btn-login']) ) { 

  // prevent sql injections/ clear user invalid inputs
  $email = trim($_POST['email']);
  $email = strip_tags($email);
  $email = htmlspecialchars($email);

  $pass = trim($_POST['pass']);
  $pass = strip_tags($pass);
  $pass = htmlspecialchars($pass);
  // prevent sql injections / clear user invalid inputs

  if(empty($email)){
   $error = true;
   $emailError = "Please enter your email address.";
  } else if ( !filter_var($email,FILTER_VALIDATE_EMAIL) ) {
   $error = true;
   $emailError = "Please enter valid email address.";
  }

  if(empty($pass)){
   $error = true;
   $passError = "Please enter your password.";
  }

  // if there's no error, continue to login
  if (!$error) {

   $password = hash('sha256', $pass); // password hashing using SHA256

   $res=mysql_query("SELECT userId, userName, userPass FROM users WHERE userEmail='$email'");
   $row=mysql_fetch_array($res);
   $count = mysql_num_rows($res); // if uname/pass correct it returns must be 1 row

    if( $count == 1 && $row['userPass']==$password && isset($_POST["new"]) )  {
        $_SESSION['user'] = $row['userId'];
        header('Location:../new');
} else if ($count == 1 && $row['userPass']==$password) {
          $_SESSION['user'] = $row['userId'];
        header('Location:../');
    }
 else {
        $errMSG = "Incorrect Credentials, Try again...";
}

}
 }
?>

Answer 1

I do not want the user to access the "New post" page if not logged in [That's solved]

我假设你已经通过类似或类似的方式解决了这个问题。

if (!isset($_SESSION['user'])) {
    header('Location:login.php');
}

我建议你把头函数改成这个。假设新 post 页面名为 new.php

    header('Location:login.php?redirectto=new.php');

然后在您的登录页面代码中：

if( $count == 1 && $row['userPass']==$password && !empty($_GET["redirectto"]) )  {
    $_SESSION['user'] = $row['userId'];
    header('Location:'.$_GET["redirectto"]);
} else if ($count == 1 && $row['userPass']==$password) {
    $_SESSION['user'] = $row['userId'];
    header('Location:../');
}
  else {
    $errMSG = "Incorrect Credentials, Try again...";
}

在 Php isset() 方面需要帮助

Need help in Php isset()

php

isset