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php
a year ago
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<?php // Define the cache expiration time (in seconds) $cache_expiration_time = 3600; // Define the file path to be cached $file_path = "/path/to/your/file.txt"; // Check if the cache file exists and is still valid if (file_exists($file_path . ".cache") && time() - filemtime($file_path . ".cache") < $cache_expiration_time) { // If so, output the cached file contents echo file_get_contents($file_path . ".cache"); } else { // Otherwise, asynchronously prewarm the cache and output the original file contents // Start a background process to prewarm the cache asynchronously $pid = pcntl_fork(); if ($pid == -1) { die('Error: could not fork'); } else if ($pid) { // Parent process: continue executing and output the original file contents // Read the original file contents $file_contents = file_get_contents($file_path); // Output the original file contents echo $file_contents; // Write the original file contents to the cache file file_put_contents($file_path . ".cache", $file_contents); } else { // Child process: prewarm the cache asynchronously // Read the file contents (this will trigger any necessary file system caching) file_get_contents($file_path); // Sleep for six hours before exiting (this will allow the cache to be prewarmed asynchronously) sleep(6 * 60 * 60); // Exit the child process exit(); } } ?>