What best practices should be followed when toggling content visibility in PHP, considering security and usability concerns?

When toggling content visibility in PHP, it is important to ensure that the visibility toggle functionality is secure and user-friendly. To achieve this, you should use server-side validation to check user permissions before displaying sensitive content, sanitize user input to prevent SQL injection or XSS attacks, and provide clear feedback to users when toggling content visibility. 

<?php
// Check user permissions before displaying sensitive content
if($user->hasPermission('view_sensitive_content')) {
    // Sanitize user input to prevent SQL injection or XSS attacks
    $content = htmlentities($_POST['content']);
    // Display the content
    echo $content;
} else {
    // Provide feedback to user if they do not have permission
    echo "You do not have permission to view this content.";
}
?>

Keywords

XSS prevention PHP security Content visibility User authentication Sanitization techniques

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