Examples

PHP script that demonstrate how to implement a basic user ban system

Below is a simple example of a PHP script that demonstrates how to implement a basic user ban system. This example will include a database table for users, and you’ll see how to ban a user by updating their status in the database.

Step 1: Set up your database

First, create a database and a table to hold the user data. Here’s an example SQL statement to create a simple users table:

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(255) NOT NULL,
    is_banned TINYINT(1) DEFAULT 0
);

Step 2: PHP script to ban a user

Next, here’s a ban_user.php script that takes a username and bans that user by updating the is_banned field in the database.

<?php
// Database connection details
$host = 'localhost';
$db   = 'your_database_name';
$user = 'your_database_user';
$pass = 'your_database_password';
$charset = 'utf8mb4';

// Set up the PDO connection
$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];

try {
    $pdo = new PDO($dsn, $user, $pass, $options);
} catch (\PDOException $e) {
    throw new \PDOException($e->getMessage(), (int)$e->getCode());
}

// Function to ban a user
function banUser($username, $pdo) {
    $sql = "UPDATE users SET is_banned = 1 WHERE username = ?";
    $stmt = $pdo->prepare($sql);
    $stmt->execute([$username]);
    
    if ($stmt->rowCount() > 0) {
        echo "User '$username' has been banned successfully.";
    } else {
        echo "User '$username' not found or already banned.";
    }
}

// Check if a username is provided
if (isset($_POST['username'])) {
    $username = $_POST['username'];
    
    // Call the function to ban the user
    banUser($username, $pdo);
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Ban User</title>
</head>
<body>
    <h1>Ban a User</h1>
    <form method="post">
        <label for="username">Username:</label>
        <input type="text" name="username" required>
        <button type="submit">Ban User</button>
    </form>
</body>
</html>

How it works

  1. Database Connection: The script first sets up a connection to the MySQL database using PDO.
  2. Ban User Function: The banUser function takes a username and updates the is_banned field to 1 (true) in the database if the user exists.
  3. HTML Form: The user is prompted to enter a username, which is then sent to the server via a POST request.
  4. Execution: When the form is submitted, the script checks if a username is provided and calls the banUser function.

Notes

  • Make sure you replace the database connection details (name, user, password) with your actual values.
  • This script does not include any security measures (like user authentication, validation, or sanitization), which should be implemented in a production environment.
  • You might also want to handle unbanning users and display a list of banned users for better management.
Victoria

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Published by
Victoria
2 months ago

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