Detailed code for creating user registration system with PHP
This article mainly introduces the detailed code for creating a user registration system in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.
User registration system
Write an index.php page with a username and password form, submit the post to check.php, and output the username and "username and password" md5 value
Create a mysql database locally, named segmentfault, create a table user, the field username password will store the content received by check.php in the previous question
Let’s complete the HTML part first:
<!DOCTYPE HTML> <html> <head> <title>注册</title> </head> <body> <h1>注册</h1> <form action="check.php" enctype="application/x-www-form+xml" method="post"> <p> <label for="name">邮箱</label> <input name="name" required type="email" placeholder="请填写有效邮箱"></input> </p> <p> <label for="passphrase">密码</label> <input name="passphrase" required type="passphrase"></input> </p> <p> <input type="submit" value="提交"></input> </form> </body> </html>
Note that HTML5's support for forms is much better than previous versions of HTML, and various types can be directly specified. For example, if type="email" is specified, it will check whether the email address submitted by the user is legal.
Then check.php.
<!DOCTYPE> <html> <head> <title> 注册成功！</title> </head> <body> <h1> 哇咔咔，你已经注册成功啦！</h1> <p>呃……不过注册成功了好像也没什么用，因为本网站除了注册以外好像没有其他功能。</p> <p>那么，作为补偿，我会告诉你，你的“邮箱+密码”的md5值。</p> <p>你的邮箱是：
The following is the PHP part, which is directly embedded in HTML. This is the advantage of PHP:
<?php $username = htmlspecialchars($_POST["name"]); echo $username; ?> </p> <p>你的“邮箱+密码”的md5值是： <?php $passphrase = htmlspecialchars($_POST["passphrase"]); $md5sum = md5($username . $passphrase); echo $md5sum;
Note that we use htmlspecialchars to prevent users from filling in strange things.
Then comes the database operation, we use mysqli, (mysql has been abandoned, now it is recommended to use mysqli, of course you can also use PDO.)
First we specify some information about the database:
$db_server = "localhost"; $db_user = "db_user"; $db_pass = "password"; $db_name = "segmentfault";
Connect to the database and make sure the connection is normal:
$conn = new mysqli($db_server, $db_user, $db_pass, $db_name);
if (mysqli_connect_errno()) {
trigger_error("Database connection failed: " . mysqli_connect_error(), E_USER_ERROR);
}Use SQL statements to create a table
The code is as follows:
$sql = "CREATE TABLE user(username CHAR(140), password CHAR(140))";
Add records
The code is as follows:
mysqli_query($conn, "INSERT INTO user (username, password) VALUES ($username, $md5sum)");
Hand-written SQL is not very comfortable. In actual application, the framework will provide you with various conveniences.
Close the database:
mysqli_close($conn); ?> </p> </body> </html>
Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.
Related recommendations:
php array function array_walk usage and examples
PHPExcel implementation of reading excel files and simple examples
PHP MVC framework skymvc supports multiple file upload implementation methods
The above is the detailed content of Detailed code for creating user registration system with PHP. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1423
52
1321
25
1269
29
1249
24
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?
Apr 17, 2025 am 12:06 AM
In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?
Apr 17, 2025 am 12:25 AM
PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.
PHP and Python: Code Examples and Comparison
Apr 15, 2025 am 12:07 AM
PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
PHP vs. Other Languages: A Comparison
Apr 13, 2025 am 12:19 AM
PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
