What are the best practices for handling frequent data updates from external sources in PHP scripts?

When handling frequent data updates from external sources in PHP scripts, it is important to implement caching mechanisms to reduce the load on the external source and improve performance. One common approach is to store the retrieved data in a cache (such as memcached or Redis) and set an expiration time to fetch fresh data periodically. This way, the PHP script can check the cache first before making a request to the external source, reducing the number of requests and improving the overall efficiency of the script. 

// Example code snippet for handling frequent data updates from external sources using caching

// Connect to cache server (e.g., memcached)
$cache = new Memcached();
$cache->addServer('localhost', 11211);

// Set cache key and expiration time
$cacheKey = 'external_data';
$expiration = 3600; // 1 hour

// Check if data is in cache
$data = $cache->get($cacheKey);

// If data is not in cache or expired, fetch fresh data from external source
if (!$data) {
    $data = fetchDataFromExternalSource();

    // Store data in cache with expiration time
    $cache->set($cacheKey, $data, $expiration);
}

// Use the data retrieved from cache or external source
echo $data;

// Function to fetch data from external source
function fetchDataFromExternalSource() {
    // Code to fetch data from external source
    return 'Data from external source';
}

Keywords

data updates external sources PHP scripts data handling frequent updates

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