$kelimeler = [
    "kelime1",
    "kelime2",
    "kelime3"
];
 
$timeoutMin = 10;
$cacheFilePath = __DIR__ . '/random_words.php';
 if(!file_exists($cacheFilePath) || (time() - filemtime($cacheFilePath)) >  ($timeoutMin * 60)) {
   $content = "<?php \n\n return ";
   shuffle($kelimeler);
   $content .= var_export($kelimeler, true);
   $content .= ";";
   file_put_contents($cacheFilePath, $content);
 }
 
 $randomWords = include $cacheFilePath;