Zend opcache warmup

warmup.php

<?php
$start = microtime(true);
$files = 0;
$errors = 0;
foreach (['/home/httpd/html/'] as $path) {
    // Get the realpath and check it's valid
    $path = realpath($path);
    if (!$path) {
        continue;
    }
    // Create a directory iterator
    $dir = new RecursiveDirectoryIterator($path);
    // Create a recursive iterator
    $iterator = new RecursiveIteratorIterator($dir);
    $filters = function($file) {
            // Check the extension
            $ext = $file->getExtension();
            if (!($ext == 'php')) {
                return false;
            }
            return true;
        };
    // Filter the iterator using our custom filter iterator
    $filter = new CallbackFilterIterator($iterator, $filters);
    // Iterate over the files that match
    $return = 0;
    foreach ($filter as $file) {
        $realPath = $file->getRealPath();
        if ($return == 0) {
            // Increment our counter
            $files++;
            // Cache the file with Zend OpCache
            
            if(opcache_compile_file($realPath)) {
                if(!opcache_is_script_cached($realPath)) {
                    echo $realPath.' was not cached <br>'.PHP_EOL;
                }
            }
        } else {
            // Increment our error counter
            $errors++;
        }   
    }   
}   
time(true);
// Display results
echo "Cached $files files in " .($end - $start). " seconds" . PHP_EOL;