How can the use of browser developer tools impact the security of PHP forms and queries?

When using browser developer tools, users can easily view and manipulate the data being sent in PHP forms and queries. This can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To mitigate this risk, it is important to sanitize and validate user input on the server-side before processing any forms or queries. 

// Sanitize and validate user input before processing forms or queries
$username = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
$password = filter_var($_POST['password'], FILTER_SANITIZE_STRING);

// Use prepared statements to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username AND password = :password");
$stmt->bindParam(':username', $username);
$stmt->bindParam(':password', $password);
$stmt->execute();

Keywords

browser developer tools security PHP forms queries vulnerabilities

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