wp-scan-non-optimized-images-v2.php

<?php
// Get non-optimised image list in batch with generator
function fp_scan_all_images()
{
    $upload_dir     = wp_upload_dir();
    $uploads_path   = $upload_dir['basedir'];
    $uploads_url    = $upload_dir['baseurl'];
    $optimized_path = WP_CONTENT_DIR . '/flying-press-images';

    $batch = [];
    $batch_count = 100;

    foreach (fp_scan_images_generator() as $file) {
        $optimized_file = str_replace($uploads_path, $optimized_path, $file);
        if (is_file($optimized_file)) {
            continue;
        }

        $batch[] = $file;

        if (count($batch) >= $batch_count) {
            error_log(print_r($batch,true));
            $batch = [];
        }
    }

    if ($batch) {
      error_log(print_r($batch,true));
    }
}

function fp_scan_images_generator()
{
    try {
        $upload_dir = wp_upload_dir();
        $directory = $upload_dir['basedir'];

        // Recursive scan with FileSystemIterator
        $iterator = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($directory, FilesystemIterator::SKIP_DOTS)
        );

        if (empty($iterator)) {
            return [];
        }

        foreach ($iterator as $file) {
            if (
                !$file->isFile() ||
                !in_array(strtolower($file->getExtension()), ['jpg', 'jpeg', 'png'], true)
            ) {
                continue;
            }

            yield $file->getPathname();
        }
    } catch (\Throwable $e) {
        error_log('FlyingPress: Error scaning images - ' . $e->getMessage());
    }
}