In PHP, how do I cache objects for beginners?

Caching objects in PHP can significantly improve the performance of applications by reducing the number of times data is fetched from a data source or recalculated. Below is a simple example of how to cache objects using PHP's file system.

<?php // Define a cache file path $cacheFile = 'cache/data.cache'; // Function to get data function getData($forceRefresh = false) { global $cacheFile; // Check if cache exists and is still valid if (!$forceRefresh && file_exists($cacheFile) && (time() - filemtime($cacheFile) < 3600)) { // Read data from the cache $data = file_get_contents($cacheFile); return unserialize($data); } // If cache is not valid or does not exist, fetch new data $data = fetchDataFromSource(); // Assume this function fetches data from a database or API // Save data to cache file_put_contents($cacheFile, serialize($data)); return $data; } // Example function to simulate data fetching function fetchDataFromSource() { // Simulate a database or API call return ['name' => 'John Doe', 'age' => 30]; } // Use the caching function $userData = getData(); print_r($userData); ?>

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