What are common features required in a PHP login script?

Common features required in a PHP login script include user authentication, password hashing for security, session management to keep users logged in, and error handling for invalid login attempts. 

<?php
// User authentication function
function authenticate_user($username, $password){
    // Validate username and password against database
    // Return true if valid, false if not
}

// Password hashing function
function hash_password($password){
    // Hash password using bcrypt or other secure hashing algorithm
    // Return hashed password
}

// Session management
session_start();

// Error handling for login form submission
if($_SERVER["REQUEST_METHOD"] == "POST"){
    $username = $_POST["username"];
    $password = $_POST["password"];
    
    if(authenticate_user($username, $password)){
        $_SESSION["username"] = $username;
        header("Location: dashboard.php");
        exit();
    } else {
        echo "Invalid username or password";
    }
}
?>

Keywords

Authentication User management Session management Password hashing Form validation

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