What are the potential pitfalls of using fixed graphical elements in PHP security measures?

Using fixed graphical elements in PHP security measures can lead to predictability and vulnerability in the system. Attackers can easily identify and bypass these fixed elements, rendering them ineffective in protecting the application. To mitigate this risk, it is recommended to use dynamic and randomized security measures to enhance the overall security of the system.

// Implementing dynamic security measures
$randomNumber = mt_rand(1000, 9999);
$hashedNumber = password_hash($randomNumber, PASSWORD_DEFAULT);

// Use $hashedNumber in your security measures