The second-hand recycling website uses the secondary and triple verification functions developed in PHP

Second-hand recycling website uses the secondary and three-dimensional verification function developed by PHP

With the rapid development of the second-hand recycling market, more and more people are beginning to buy and sell second-hand goods through the website. However, due to the existence of some bad merchants and fraudulent practices, users have higher requirements for transaction security. In order to protect the interests of users, the second-hand recycling website has developed a two- and three-step verification function by using PHP, which effectively improves user transaction security.

The two- and three-step verification function means that when users perform key operations such as account registration, login, and transactions, in addition to the regular user name and password verification, they also need to enter additional verification information for confirmation to increase the account's security safety.

The following is a code example of the secondary and triple verification functions developed by the second-hand recycling website using PHP:

1. Registration page:

   <form action="register.php" method="POST">
    <input type="text" name="username" placeholder="请输入用户名">
    <input type="password" name="password" placeholder="请输入密码">
    <input type="email" name="email" placeholder="请输入邮箱">
    <input type="text" name="phone" placeholder="请输入手机号码">
    <input type="text" name="captcha" placeholder="请输入图形验证码">
    <input type="text" name="sms_code" placeholder="请输入短信验证码">
    <input type="submit" value="注册">
   </form>

2. Registration processing page (register.php):

   <?php
   session_start();
   
   // 获取表单提交的数据
   $username = $_POST['username'];
   $password = $_POST['password'];
   $email = $_POST['email'];
   $phone = $_POST['phone'];
   $captcha = $_POST['captcha'];
   $sms_code = $_POST['sms_code'];
   
   // 验证图形验证码是否正确
   if ($captcha != $_SESSION['captcha']) {
    echo "图形验证码错误";
    exit;
   }
   
   // 验证短信验证码是否正确
   if ($sms_code != $_SESSION['sms_code']) {
    echo "短信验证码错误";
    exit;
   }
   
   // 进行用户注册操作
   // ...
   
   // 注册成功后，跳转到登录页面
   header("Location: login.php");

3. Login page:

   <form action="login.php" method="POST">
    <input type="text" name="username" placeholder="请输入用户名">
    <input type="password" name="password" placeholder="请输入密码">
    <input type="text" name="sms_code" placeholder="请输入短信验证码">
    <input type="submit" value="登录">
   </form>

4. Login processing page (login.php):

   <?php
   session_start();
   
   // 获取表单提交的数据
   $username = $_POST['username'];
   $password = $_POST['password'];
   $sms_code = $_POST['sms_code'];
   
   // 进行用户名和密码的验证
   // ...
   
   // 验证短信验证码是否正确
   if ($sms_code != $_SESSION['sms_code']) {
    echo "短信验证码错误";
    exit;
   }
   
   // 登录成功后，将用户信息保存到session中
   // ...
   
   // 跳转到用户的个人主页
   header("Location: profile.php");

Through the above code example, the second-hand recycling website has implemented the second and third verification functions. When registering and logging in, users need to pass graphic verification codes and SMS verification codes to ensure the security of their accounts. In this way, even if someone steals the user's username and password, they will not be able to successfully log in to the user's account.

In addition to registration and login operations, second-hand recycling websites can also require users to verify again when they perform important transaction operations to ensure the security of the transaction.

In summary, the second-hand recycling website uses the secondary and triple verification functions developed by PHP to improve user transaction security through the verification of graphic verification codes and SMS verification codes. This verification method has been widely used in many websites, effectively protecting the interests of users. In the future, with the continuous development of technology, I believe that more and more powerful verification methods will emerge to provide users with a safer trading environment.

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