What potential pitfalls should PHP developers be aware of when implementing a reload lock using Formular Token to prevent excessive browser navigation?

When implementing a reload lock using Formular Token to prevent excessive browser navigation, PHP developers should be aware of potential pitfalls such as token expiration and token reuse. To avoid these issues, developers should generate a new token for each form submission and validate it on the server side before processing the request. 

<?php
session_start();

// Generate a new token
$token = bin2hex(random_bytes(32));
$_SESSION['form_token'] = $token;

// Validate the token on form submission
if(isset($_POST['submit'])) {
    if($_POST['form_token'] === $_SESSION['form_token']) {
        // Process the form submission
        // Reset the token to prevent reuse
        $_SESSION['form_token'] = bin2hex(random_bytes(32));
    } else {
        // Handle invalid token error
    }
}
?>

Keywords

PHP Formular Token reload lock browser navigation implementation

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