How to retrieve personal password in php

In the current Internet era, as more and more information in people's work and life needs to be stored on the Internet, people's demand for passwords is also getting higher and higher. On the one hand, passwords can protect the security and privacy of personal information. On the other hand, due to the increasing intensity of life and work, people's memory has also declined significantly, leading to more and more people forgetting their own information. password. Therefore, how to easily and conveniently retrieve personal passwords has become a very common need. This article will introduce how to retrieve personal passwords in PHP.

1. Idea

Before implementing this function, we need to understand the idea of ​​​​this method. The password retrieval function, simply put, is to reset the user's password by verifying the user's "security question" or by "verifying the email address". Therefore, when we implement the password retrieval function, we generally perform the following core operations:

1. Verify the user's email or mobile phone number
2. Let the user answer the set security questions
3. Send password reset email or SMS link
4. Reset user password
5. Send password modification success prompt

2. Implementation method

Below, we will introduce in detail how PHP implements personal password retrieval.

Step1: Create a database table

First, we need to create a database table to store the user's basic data information, including user accounts, passwords, email addresses, security questions, etc. The following is a common user information table:

CREATE TABLE user (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(255) NOT NULL,
password varchar(255) NOT NULL,
email varchar(255) NOT NULL,
question varchar(255) NOT NULL,
answer varchar(255) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Through the creation of the above database table, we can store the user's basic information, including user name, password, email address and set security questions and answers and other necessary information.

Step2: Verify the user's email or mobile phone number

When verifying the user's email or mobile phone number, we need to obtain the user's registration information from the database and compare it with the account entered by the user. . The specific verification method can be verified using PHP's built-in function, as follows:

//Regular expression for detecting mobile phone number format
$pattern = "/^1[34578]\d{9}$ /";
if (!preg_match($pattern, $user_account)) {

echo '手机格式不正确';
return;

}
//Query user information
$sql = "SELECT * FROM user WHERE email=' $user_account' OR mobile='$user_account'";
$res = mysqli_query($sql);
$userInfo = mysqli_fetch_assoc($res);

We can use the above code to implement user Logic to verify account information when setting a new password.

Step3: Let the user answer the security questions set by the user

After the user enters and confirms the account information, we need to determine the security questions set by the user and further confirm the user's identity information. The following is a common verification method:

if($userInfo["answer"] == $user_answer) {

$mail = $userInfo["email"];
$to = $mail;
$subject = '重置密码通知';
$new_password = generate_password(); // 生成一个新密码
$sql = "UPDATE user SET password = '$new_password' WHERE email = '$mail' OR mobile = '$mail' ";
mysqli_query($sql);
$text = "尊敬的用户，您的新密码为：".$new_password." ，请及时修改。";
mail($to,$subject,$text);
echo '修改成功，请查收邮件';

} else {

echo '密保问题验证失败';

}

In the above code, we further implemented the password retrieval function and improved the user experience by sending a password reset email to the user's mailbox.

Step4: Reset user password

After confirming the user name and security issues, we also need to complete the password reset operation. The following is a specific operation method:

$new_password = generate_password(); //Generate a new password
$sql = "UPDATE user SET password = '$new_password' WHERE email = '$mail' OR mobile = '$mail' ";
mysqli_query($sql);

Through the above code, we successfully implemented the password reset operation, which provides guarantee for further improving the user experience.

Step5: Send a successful password change prompt

After completing the user password reset operation, we need to use notification methods such as email or SMS to send a prompt message to the user indicating that the password has been successfully changed. The following is a common reminder:

$text = "Dear user, your new password is: ".$new_password.", please change it in time.";
mail($to, $ subject, $text);

3. Conclusion

Based on the above implementation method, we can easily implement the personal password retrieval operation in PHP. Through this method, we can not only ensure the security and privacy of personal information, but also improve the user experience and further promote the development of Internet technology.

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