What are the implications of relying on outdated browsers like IE 6 for PHP-based web applications, in terms of security, functionality, and user experience?

Relying on outdated browsers like IE 6 for PHP-based web applications can pose significant security risks as these browsers lack modern security features and are more vulnerable to cyber attacks. Additionally, functionality may be limited as these browsers do not support newer web technologies. User experience may also suffer due to slower loading times and potential display issues. 

<?php
// Redirect users using outdated browsers to a page advising them to update
$user_agent = $_SERVER['HTTP_USER_AGENT'];
if (strpos($user_agent, 'MSIE 6') !== false) {
    header('Location: update_browser.php');
    exit();
}
?>

Keywords

Outdated browsers IE 6 security vulnerabilities deprecated functions compatibility issues

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