What are the potential drawbacks of loading data from a database with the page request in PHP web development?

Loading data from a database with every page request can lead to decreased performance and increased load on the database server. To mitigate this issue, one solution is to implement caching mechanisms to store frequently accessed data and reduce the number of database queries made during each page request.

// Example of implementing caching to reduce database queries
function get_cached_data($key) {
    // Check if data is already cached
    if (cache_exists($key)) {
        return get_cached_data($key);
    } else {
        // If data is not cached, fetch data from the database
        $data = fetch_data_from_database($key);
        // Store data in cache for future use
        cache_data($key, $data);
        return $data;
    }
}