How can PHP functions like is_array() and isset() be used to ensure data integrity and prevent errors in dynamic menu generation?

To ensure data integrity and prevent errors in dynamic menu generation, PHP functions like is_array() and isset() can be used to check the validity of data before processing it. By verifying if a variable is an array using is_array() and checking if a variable is set using isset(), we can avoid errors caused by invalid or missing data when generating dynamic menus.

// Example code snippet using is_array() and isset() for dynamic menu generation

$menuItems = []; // Assume this is the array of menu items

if (is_array($menuItems) && isset($menuItems)) {
    // Loop through menu items and generate the dynamic menu
    foreach ($menuItems as $menuItem) {
        echo '<li>' . $menuItem . '</li>';
    }
} else {
    echo 'Error: Invalid menu data.';
}