In what ways can the use of the mysqli extension and hash functions improve the security and performance of PHP code, especially in the context of modern web development practices?

Using the mysqli extension instead of the deprecated mysql extension can improve security by allowing for prepared statements, which help prevent SQL injection attacks. Additionally, using hash functions like password_hash() and password_verify() can improve security by securely storing and verifying passwords. These practices can also enhance performance by optimizing database queries and reducing the risk of security vulnerabilities. 

// Using mysqli extension for database connection
$mysqli = new mysqli('localhost', 'username', 'password', 'database');

// Using prepared statements to prevent SQL injection
$stmt = $mysqli->prepare("SELECT * FROM users WHERE username = ?");
$stmt->bind_param("s", $username);
$stmt->execute();
$result = $stmt->get_result();

// Using password_hash() to securely store passwords
$password = password_hash($password, PASSWORD_DEFAULT);

// Using password_verify() to verify passwords
if (password_verify($input_password, $stored_password)) {
    // Passwords match
} else {
    // Passwords do not match
}

Keywords

mysqli extension hash functions security performance modern web development practices

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