如何让我的注册表单页面与 php 一起使用？

Question

请我对网站开发有点陌生。 我尝试创建一个注册页面来使用我的数据库，但我的注册表单页面没有响应 php 编码页面。 我需要你的帮助。 感谢

这是我的注册。html 页面我不知道错误是否来自我的注册表单页面

<form action="student.php" name="register" id="register" method="POST" data-aos="fade">
              <div class="form-group row">
                <div class="col-md-6 mb-3 mb-lg-0">
                  <input type="text" name="firstname" id="firstname" class="form-control" placeholder="First name" required>
                </div>
                <div class="col-md-6">
                  <input type="text" name="lastname" id="lastname" class="form-control" placeholder="Last name" required>
                </div>
              </div>

              <div class="form-group row">
                <div class="col-md-12">
                  <input type="text" name="studentid" id="studentid" class="form-control" placeholder="Student ID" value="" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="text" name="level" class="form-control" placeholder="Level" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                <p class="mb-0">Gender</p>
                     <input name="gender" type="radio"  value="m" required> Male
                     <input name="gender" type="radio"  value="f" required> Female
                    
                </div>
              </div>
             <div class="form-group row">
                <div id="date-picker" class="col-md-12 md-form md-outline input-with-post-icon datepicker" inline="true">
                  <input type="text" name="dob" class="form-control" id="date9" placeholder="DD/MM/YYYY" required>
                  <i class="fas fa-calendar input-prefix"></i>
                </div>
              </div>
                <script>
                    $('.datepicker').datepicker({
                        inline: true;
                    });
                    </script>
                
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="email" name="email" class="form-control" placeholder="Email" value="" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="phone" name="phonenumber" id="phonenumber" class="form-control" placeholder="+234 8179 5523 71" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="department" name="department" class="form-control" placeholder="Department" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="password" name="password" value=""  id="password" class="form-control" placeholder="Password" required>
                </div>
              </div>
             <div class="form-group row">
                <div class="col-md-12">
                  <input type="password" name="confirmpassword" id="confirmpassword" value="" class="form-control" placeholder="Confirm Password" required>
                </div>
              </div>
                
              <div class="form-group row">
                <div class="col-md-6">
                  
                  <input type="submit" name="submit" class="btn btn-primary py-3 px-5 btn-block btn-pill" value="SUBMIT">
                    
                </div>
              </div>

            </form>

这是我的表格 Php 页面，或者错误可能来自我的 php 代码。 请帮助发现问题的家伙。 谢谢。

<?php
session_start();

// initializing variables
$studentid = "";
$email    = "";
$errors = array(); 

// connect to the database
$db = mysqli_connect('localhost', 'root', '', 'oneschool');

// REGISTER USER
if (isset($_POST['submit'])) {
  // receive all input values from the form
  $firstname = mysqli_real_escape_string($db, $_POST['firstname']);
  $lastname = mysqli_real_escape_string($db, $_POST['lastname']);
  $studentid = mysqli_real_escape_string($db, $_POST['studentid']);
  $level = mysqli_real_escape_string($db, $_POST['level']);
  $gender = mysqli_real_escape_string($db, $_POST['gender']);
  $dob = mysqli_real_escape_string($db, $_POST['dob']);
  $email = mysqli_real_escape_string($db, $_POST['email']);
  $phonenumber = mysqli_real_escape_string($db, $_POST['phonenumber']);
  $department = mysqli_real_escape_string($db, $_POST['department']);
  $password_1 = mysqli_real_escape_string($db, $_POST['password']);
  $password_2 = mysqli_real_escape_string($db, $_POST['confirmpassword']);

  // form validation: ensure that the form is correctly filled ...
  // by adding (array_push()) corresponding error unto $errors array
  if (empty($studentid)) { array_push($errors, "Student ID is required"); }
  if (empty($email)) { array_push($errors, "Email is required"); }
  if (empty($password_1)) { array_push($errors, "Password is required"); }
  if ($password_1 != $password_2) {
    array_push($errors, "The two passwords do not match");
  }

  // first check the database to make sure 
  // a user does not already exist with the same username and/or email
  $user_check_query = "SELECT * FROM student_registra WHERE studentid='$studentid' OR email='$email' LIMIT 1";
  $result = mysqli_query($db, $user_check_query) or die(mysqli_error($db));
  $user = mysqli_fetch_assoc($result);
  
  if ($user) { // if user exists
    if ($user['studentid'] === $studentid & $user['email'] === $email) {
      array_push($errors, "Student Id already taken");
    }

    if ($user['email'] === $email) {
      array_push($errors, "email already exists");
    }
  }

  // Finally, register user if there are no errors in the form
  if (count($errors) == 0) {
    $password = md5($password_1);//encrypt the password before saving in the database

    $query = "INSERT INTO student_registra (firstname, lastname, studentid, level, gender, dob, email, phonenumber, department, password) 
              VALUES('$firstname', '$lastname', '$studentid', '$level', '$gender', '$dob', '$email', '$phonenumber', '$department', '$password')";
    mysqli_query($db, $query);
    $_SESSION['studentid'] = $studentid;
    $_SESSION['success'] = "Registration Sucessful";
    header('location: index.html');
  }
}

我不知道问题出在哪里，因为我第一次运行它时运行它，但是当我关闭笔记本电脑并在午餐后再次打开它时，它停止工作。 与其读取 .php 代码，不如显示整个 .php 代码，我检查了代码，但找不到问题所在。 伙计们，我需要你的帮助来解决这个问题或发现问题。 谢谢

Answer 1

编辑，你有很多无用的代码让你的代码很慢，比如 $_SESSION['success']; 这不是必需的，将您的 index.html 更改为 index.php 并删除它，因为它什么都不做，您可以检查 session 学生分配的两个性别，您如何？ 这是第一个错误其次，使用准备好的语句来避免 SQLI 攻击第三个当你在 php 页面时，你怎么 header 一个 html 页面？ 将 index.html 更改为 index.php

并改用此代码：

 if (count($errors) == 0) {
    $password = md5($password_1);//encrypt the password before saving in the database
    $prepared = "INSERT INTO student_registra (firstname, lastname, studentid, level, gender, dob, email, phonenumber, department, password) 
              VALUES('$firstname', '$lastname', '$studentid', '$level', '$gender', '$dob', '$email', '$phonenumber', '$department', '$password')";

    $query = $prepared;
    mysqli_query($db, $query);
    $_SESSION['studentid'] = $studentid;
    # Change your files index.html To index.php
    header('location: index.php');
  }