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wp-content/plugins/ewww-image-optimizer/classes/class-async-scan.php

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+<?php
+/**
+ * Class for Background of Media Library images.
+ *
+ * @link https://ewww.io
+ * @package EWWW_Image_Optimizer
+ */
+
+namespace EWWW;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Handles an async request to scan for unoptimized images. Subsequent calls will resume from the previous request.
+ *
+ * @see EWWW\Async_Request
+ */
+class Async_Scan extends Async_Request {
+
+	/**
+	 * The action name used to trigger this class extension.
+	 *
+	 * @access protected
+	 * @var string $action
+	 */
+	protected $action = 'ewwwio_scan_async';
+
+	/**
+	 * Handles the async scan request.
+	 */
+	protected function handle() {
+		session_write_close();
+		ewwwio_debug_message( '<b>' . __METHOD__ . '()</b>' );
+		check_ajax_referer( $this->identifier, 'nonce' );
+		global $ewww_scan;
+		$ewww_scan = empty( $_REQUEST['ewww_scan'] ) ? '' : sanitize_key( $_REQUEST['ewww_scan'] );
+		ewww_image_optimizer_aux_images_script( 'ewww-image-optimizer-auto' );
+	}
+}