What are the best practices for handling login attempts in PHP to prevent unauthorized access?

To prevent unauthorized access, it is important to implement security measures for handling login attempts in PHP. This includes limiting the number of failed login attempts, implementing CAPTCHA verification for suspicious login attempts, and using strong password hashing techniques to securely store user passwords. 

<?php

// Limit the number of failed login attempts
$max_attempts = 3;
$failed_attempts = 0;

// Check if the maximum number of failed attempts has been reached
if($failed_attempts >= $max_attempts){
    // Implement CAPTCHA verification or lockout mechanism
    // Display CAPTCHA or lockout message
}else{
    // Continue with login process
}

// Use strong password hashing techniques
$password = "user_password";
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

?>

Keywords

authentication security password hashing rate limiting session management

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