1. Go to this page and download the library: Download picperf/wordpress library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
picperf / wordpress example snippets
// Transform all images (default).
define('PICPERF_TRANSFORMATION_SCOPE', 'ALL');
// Only transform `the_content` images.
define('PICPERF_TRANSFORMATION_SCOPE', 'CONTENT');
// Transform no images.
define('PICPERF_TRANSFORMATION_SCOPE', null);
// Include no images in sitemap (default).
define('PICPERF_ADD_SITEMAP_PATH', null);
// Only add `the_content` images to sitemap.
define('PICPERF_ADD_SITEMAP_PATH', 'CONTENT');
// Add all image so sitemap.
define('PICPERF_ADD_SITEMAP_PATH', 'ALL');