How can PHP functions like strtolower() and strtoupper() be utilized to improve user experience in login systems?

Issue: User experience in login systems can be improved by ensuring that usernames and passwords are case-insensitive. PHP functions like strtolower() and strtoupper() can be utilized to convert input to a consistent case before comparing it with the stored data. PHP code snippet: 

$username = strtolower($_POST['username']);
$password = $_POST['password'];

// Check the database for the lowercase username and compare the password

Keywords

PHP functions strtolower() strtoupper() user experience login systems

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