What are the potential benefits of using a cache when retrieving and displaying a Google Calendar feed in PHP?

When retrieving and displaying a Google Calendar feed in PHP, it is important to consider the performance impact of making repeated API calls to fetch the same data. By implementing a cache system, we can store the retrieved data locally for a certain period of time, reducing the number of API calls needed and improving the overall performance of the application. 

// Set cache expiration time (e.g. 1 hour)
$cache_expiration = 3600;
$cache_file = 'calendar_cache.txt';

// Check if cache file exists and is still valid
if (file_exists($cache_file) && time() - filemtime($cache_file) < $cache_expiration) {
    $calendar_data = file_get_contents($cache_file);
} else {
    // Fetch Google Calendar feed
    $calendar_data = fetch_calendar_data();

    // Save data to cache file
    file_put_contents($cache_file, $calendar_data);
}

// Display calendar data
echo $calendar_data;

// Function to fetch Google Calendar data
function fetch_calendar_data() {
    // API call to fetch Google Calendar data
    // Return the fetched data
}

Keywords

cache Google Calendar API PHP performance optimization data retrieval

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