What potential issues could arise from hiding elements on a webpage, such as logos or categories, without permission?

Hiding elements on a webpage without permission can lead to confusion for users who rely on those elements for navigation or information. It can also violate copyright or trademark laws if the hidden elements are logos or branding. To solve this issue, always obtain permission before hiding any elements on a webpage and ensure that the hidden elements are not essential for user experience.

<!-- Example PHP code to check for permission before hiding elements -->
<?php
$permission = check_permission(); // Function to check if user has permission

if($permission) {
    // Display the hidden elements
    echo "<div class='logo'>Logo</div>";
    echo "<div class='categories'>Categories</div>";
}
?>