In PHP, how do I cache strings for production systems?

In a production environment, caching strings can significantly improve performance. Here is a simple example of how to cache strings using PHP's APCu extension:


        <?php
        // Check if the string is already cached
        $cachedString = apcu_fetch('my_cached_string');

        if ($cachedString === false) {
            // If not cached, generate the string
            $myString = "This is a string that can be cached.";
            
            // Store the string in the cache
            apcu_store('my_cached_string', $myString);
            echo $myString; // Output the string
        } else {
            // If cached, retrieve it
            echo $cachedString; // Output the cached string
        }
        ?>