dongyun6229
dongyun6229
2017-06-12 16:19
浏览 82
已采纳

使用php和MySQL创建密码重置页面很困难

Afternoon.

I am trying to create a password reset page using php. Upon clicking the reset button I get my password reset successful message but no changes have been made to my database.

Any help would be appreciated.

<?php
  session_start();
  $_SESSION['message'] = '';
  $mysqli = new mysqli("localhost", "User", "password", "DarrenOBrien");

  if ($_SESSION['loggedin']) {
    if ( $_SERVER['REQUEST_METHOD'] == 'POST' ) {

      $email=$_SESSION('email');
      $result = $mysqli->query("SELECT * FROM accounts WHERE userEmail='$email'") or die($mysqli->error);

      $user = $result->fetch_assoc();
        if (password_verify($_POST['oldpassword'], $user['userPassword'])) {
          if (($_POST['newpassword'] == $_POST['confirmnewpassword'])) {
            $newpass=password_hash($_POST['confirmnewpassword'], PASSWORD_BCRYPT);
            $sql = "UPDATE accounts SET userPassword='$newpass' WHERE userEmail='$email'";
            $_SESSION['message'] = 'Password reset successful';
          }
          else {
            $_SESSION['message'] = 'Passwords do not match. Please try again.';
          }
        }
        else {
          $_SESSION['message'] = 'Old password does not match password in records. Please try again.';
        }



    }
  }
  else {
    header('location: register.php');
  }

?>


<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Login</title>
  <link rel="stylesheet" href="css/bootstrap.min.css">
  <link rel="stylesheet" href="css/styles.css">
</head>

<body>
  <!--Navbar-->
   <nav class="navbar navbar-inverse">
     <div class="container">
       <div class="navbar-header">
         <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
           <span class="sr-only">Toggle navigation</span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
         </button>
         <a class="navbar-brand" href="welcome.php">PHP Project </a>
       </div>
       <div id="navbar" class="collapse navbar-collapse">
         <ul class="nav navbar-nav">
           <li><a href="welcome.php">Home</a></li>
           <li class="active"><a href="profile.php">Profile</a></li>
           <li><a href="products.php">Products</a></li>
         </ul>
         <a href="logout.php" class="navbar-brand pull-right">Logout</a>
       </div>
     </div>
   </nav>
   <!--End of Navbar-->


   <div class="container-fluid" id="profile">
     <form action="reset.php" method="post" enctype="multipart/form-data" autocomplete="off">
      <div class="alert-error"><?= $_SESSION['message'] ?></div>

       <div class="form-group">
         <label for="oldpass">Old Password:</label>
         <input type="password" class="form-control" id="oldpass" placeholder="Password" name="oldpassword" autocomplete="new-password" minlength="4" required />
       </div>

       <div class="form-group">
         <label for="newpass">New Password:</label>
         <input type="password" class="form-control" id="newpass" placeholder="Password" name="newpassword" autocomplete="new-password" minlength="4" required />
       </div>

       <div class="form-group">
         <label for="confirmnewpass">Confirm New Password:</label>
         <input type="password" class="form-control" id="confirmnewpass" placeholder="Password" name="confirmnewpassword" autocomplete="new-password" minlength="4" required />
       </div>

       <input type="submit" value="Reset Password" name="reset" class="btn btn-block btn-primary" id="resetbtn"/>
     </form>
   </div>

<!-- Required bootstrap scripts -->
  <script src="js/jquery-3.2.1.min.js"></script>
  <script src="js/bootstrap.min.js"></script>
<!-- End of required bootstrap scripts -->
</body>
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3条回答 默认 最新

  • douyou1857
    douyou1857 2017-06-12 16:30
    已采纳

    I would like to direct your eyes to this piece of code here

    if (($_POST['newpassword'] == $_POST['confirmnewpassword'])) {
            $newpass=password_hash($_POST['confirmnewpassword'], PASSWORD_BCRYPT);
            $sql = "UPDATE accounts SET userPassword='$newpass' WHERE 
            userEmail='$email'";
            $_SESSION['message'] = 'Password reset successful';
          }
    

    Here your $sql variable holds an sql statement, that is, a plain text string that currently does nothing, you have to execute it, much like you executed the select query above

    if ($mysqli->query($sql) === TRUE) {
        $_SESSION['message'] = 'Password reset successful'; 
    } else {
        $_SESSION['message'] = "Error updating record: " . $mysqli->error;
    }
    

    As taken from w3Schools

    Also if that's the whole extent of your endpoint, you should remember to close the connection, calling the close method of your mysqli class instance

    Last but not least, I would strongly recommend that you do not use the class name (mysqli) as your instance name ($mysqli), just for the sake of good practice

    EDIT:

    The comments received are right indeed, my answer is quite poor at this point, so let's take into account a few things

    You should use prepared statements instead of throwing variables directly at the sql query, someone that's clever enough could use that to inject sql statements to your database

    Please correct me if I'm wrong but this could be a lot safer this way:

    //Email select query part
    $email= $mysqli->real_escape_string($_SESSION['email']);
    $stmt = $mysqli->prepare("SELECT * FROM accounts WHERE userEmail=(?)")
    if (!$stmt->bind_param("s", mysqli->$email)) {
        echo "Binding parameters failed: (" . $stmt->errno . ") " . $stmt->error;
        //handle error code, disrupt execution...
    }
    
    if (!$stmt->execute()) {
        echo "Execute failed: (" . $stmt->errno . ") " . $stmt->error;
        //handle error code, disrupt execution...
    }
    
    
    //Update part
    $newpass=password_hash(
        $mysqli->real_escape_string($_POST['confirmnewpassword']),
        PASSWORD_BCRYPT);
    $stmt = mysqli->prepare("UPDATE accounts SET userPassword=(?) WHERE 
    userEmail=(?)");
    if (!$stmt->bind_param("ss", $newpass,$email)) {
        echo "Binding parameters failed: (" . $stmt->errno . ") " . $stmt->error;
        //handle error code, disrupt execution...
    }
    
    if (!$stmt->execute()) {
        echo "Execute failed: (" . $stmt->errno . ") " . $stmt->error;
        //handle error code, disrupt execution...
    }
    $_SESSION['message'] = 'Password reset successful';
    

    Now I'm sure this can be refactored in much more efficient ways, but I hope I helped OP see what's up with his code

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  • doufei9805
    doufei9805 2017-06-12 16:29

    use

     $reuslt = $mysqli->query("UPDATE accounts SET userPassword='$newpass' 
        WHERE userEmail='$email'");
        if ($result) {
         $_SESSION['message'] = 'Password reset successful';
        } else {
         $_SESSION['message'] = 'Passwords do not match. Please try again.';
        }
    

    Because without query you just prepared the sql format and didn't send it to the database.

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  • duanguochong0397
    duanguochong0397 2017-06-12 16:35

    You forgot to run the password updating query: So, insert this:

    $updated = $mysqli->query($sql) or die($mysqli->error);
    

    after this:

    $sql = "UPDATE accounts SET userPassword='$newpass' WHERE userEmail='$email'";
    

    EDIT 1 - How to prepare and run queries using mysqli library:


    Option 1: Using mysqli_stmt_get_result() + mysqli_fetch_array():

    <?php
    
    /*
     * Run prepared db queries.
     * 
     * Uses:
     *      - mysqli_prepare()
     *      - mysqli_stmt_bind_param()
     *      - mysqli_stmt_execute()
     *      - mysqli_stmt_get_result()
     *      - mysqli_fetch_array()
     */
    
    try {
        $username = 'Hello';
        $password = 'World';
    
        //---------------------------------------------------------
        // Connect to db.
        //---------------------------------------------------------
        $conn = mysqli_connect('<host>', '<user>', '<pass>', '<db>');
        if (!$conn) {
            throw new Exception('Connect error: ' . mysqli_connect_errno() . ' - ' . mysqli_connect_error());
        }
    
        //---------------------------------------------------------
        // Sql statement.
        //---------------------------------------------------------
        $query = "SELECT * FROM users WHERE username = ? AND password = ?";
    
        //---------------------------------------------------------
        // Prepare sql statement.
        //---------------------------------------------------------
        $stmt = mysqli_prepare($conn, $query);
        if (!$stmt) {
            throw new Exception('The sql statement can not be prepared!');
        }
    
        //---------------------------------------------------------
        // Bind variables to the prepared statement as parameters.
        //---------------------------------------------------------
        $bound = mysqli_stmt_bind_param($stmt, 'ss', $username, $password);
        if (!$bound) {
            throw new Exception('The variables could not be bound to the prepared statement!');
        }
    
        //---------------------------------------------------------
        // Execute the prepared statement.
        //---------------------------------------------------------
        $executed = mysqli_stmt_execute($stmt);
        if (!$executed) {
            throw new Exception('The prepared statement could not be executed!');
        }
    
        //---------------------------------------------------------
        // Get the result set from the prepared statement.
        //---------------------------------------------------------
        $result = mysqli_stmt_get_result($stmt);
        if (!$result) {
            throw new Exception(mysqli_error($conn));
        }
    
        //---------------------------------------------------------
        // Get the number of rows in statements result set.
        //---------------------------------------------------------
        $rows = mysqli_num_rows($result);
    
        if ($rows > 0) {
            //---------------------------------------------------------
            // Read the result set.
            //---------------------------------------------------------
            $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
            if (!isset($row)) {
                echo 'No records returned!';
                exit();
            }
    
            echo 'Login successful: ' . $row['username'] . '/' . $row['password'];
        } else {
            echo 'Invalid username/password. Please check and retry login.';
        }
    
        //-----------------------------------------------------------
        // Frees stored result memory for the given statement handle.
        //-----------------------------------------------------------
        mysqli_stmt_free_result($stmt);
    
        //---------------------------------------------------------
        // Close db connection.
        //---------------------------------------------------------
        $closed = mysqli_close($conn);
        if (!$closed) {
            throw new Exception('The database connection can not be closed!');
        }
    } catch (Exception $exception) {
        echo '<pre>' . print_r($exception, true) . '</pre>';
        exit();
    }
    


    Option 2: Using mysqli_stmt_store_result() + mysqli_stmt_bind_result() + mysqli_stmt_fetch():

    <?php
    
    /*
     * Run prepared db queries.
     * 
     * Uses:
     *      - mysqli_prepare()
     *      - mysqli_stmt_bind_param()
     *      - mysqli_stmt_execute()
     *      - mysqli_stmt_store_result()
     *      - mysqli_stmt_bind_result()
     *      - mysqli_stmt_fetch()
     */
    
    try {
        $username = 'Hello';
        $password = 'World';
    
        //---------------------------------------------------------
        // Connect to db.
        //---------------------------------------------------------
        $conn = mysqli_connect('<host>', '<user>', '<pass>', '<db>');
        if (!$conn) {
            throw new Exception('Connect error: ' . mysqli_connect_errno() . ' - ' . mysqli_connect_error());
        }
    
        //---------------------------------------------------------
        // Sql statement.
        //---------------------------------------------------------
        $query = "SELECT * FROM users WHERE username = ? AND password = ?";
    
        //---------------------------------------------------------
        // Prepare sql statement.
        //---------------------------------------------------------
        $stmt = mysqli_prepare($conn, $query);
        if (!$stmt) {
            throw new Exception('The sql statement can not be prepared!');
        }
    
        //---------------------------------------------------------
        // Bind variables to the prepared statement as parameters.
        //---------------------------------------------------------
        $bound = mysqli_stmt_bind_param($stmt, 'ss', $username, $password);
        if (!$bound) {
            throw new Exception('The variables could not be bound to the prepared statement!');
        }
    
        //---------------------------------------------------------
        // Execute the prepared statement.
        //---------------------------------------------------------
        $executed = mysqli_stmt_execute($stmt);
        if (!$executed) {
            throw new Exception('The prepared statement could not be executed!');
        }
    
        //---------------------------------------------------------
        // Transfer the result set from the prepared statement.
        //---------------------------------------------------------
        $stored = mysqli_stmt_store_result($stmt);
        if (!$stored) {
            throw new Exception('The result set from the prepared statement could not be transfered!');
        }
    
        //---------------------------------------------------------
        // Get the number of rows in statements' result set.
        //---------------------------------------------------------
        $rows = mysqli_stmt_num_rows($stmt);
    
        if ($rows > 0) {
            //---------------------------------------------------------
            // Bind result set columns to corresponding variables.
            //---------------------------------------------------------
            $bound = mysqli_stmt_bind_result($stmt, $resId, $resUsername, $resPassword);
            if (!$bound) {
                throw new Exception('The result set columns could not be bound to the variables');
            }
    
            //--------------------------------------------------------------------
            // Fetch results from the prepared statement into the bound variables.
            //--------------------------------------------------------------------
            while (mysqli_stmt_fetch($stmt)) {
                echo 'Successfully returned data:<br/><br/>';
                echo 'ID: ' . $resId . '<br/>';
                echo 'Username: ' . $resUsername . '<br/>';
                echo 'Password: ' . $resPassword . '<br/>';
            }
        } else {
            echo 'Invalid username/password. Please check and retry login!';
        }
    
        //-----------------------------------------------------------
        // Free stored result memory for the given statement handle.
        //-----------------------------------------------------------
        mysqli_stmt_free_result($stmt);
    
        //---------------------------------------------------------
        // Close db connection.
        //---------------------------------------------------------
        $closed = mysqli_close($conn);
        if (!$closed) {
            throw new Exception('The database connection can not be closed!');
        }
    } catch (Exception $exception) {
        echo '<pre>' . print_r($exception, true) . '</pre>';
        exit();
    }
    

    Nota bene: Trying to use mysqli_stmt_store_result() together with mysqli_stmt_get_result() will lead to errors.

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