Are there any best practices for optimizing PHP scripts that are being polled by many users at high frequencies?

When optimizing PHP scripts that are being polled by many users at high frequencies, it is important to minimize the use of database queries, optimize code logic, and utilize caching mechanisms to reduce server load and improve performance. 

// Example of optimizing PHP script with caching mechanism using memcached

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

// Check if data is cached
$data = $memcached->get('cached_data');
if (!$data) {
    // If data is not cached, fetch data from database
    $data = fetchDataFromDatabase();

    // Cache the data for future use
    $memcached->set('cached_data', $data, 60); // Cache for 60 seconds
}

// Use the cached data
echo $data;

// Function to fetch data from database
function fetchDataFromDatabase() {
    // Code to fetch data from database
}

Keywords

caching opcode caching database optimization load balancing request throttling

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