Fix various compatibility issues with PHP 8

libs/swiftmailer/classes/Swift/Plugins/Reporters/HtmlReporter.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A HTML output reporter for the Reporter plugin.
+ *
+ * @author Chris Corbyn
+ */
+class Swift_Plugins_Reporters_HtmlReporter implements Swift_Plugins_Reporter
+{
+    /**
+     * Notifies this ReportNotifier that $address failed or succeeded.
+     *
+     * @param Swift_Mime_Message $message
+     * @param string             $address
+     * @param int                $result  from {@see RESULT_PASS, RESULT_FAIL}
+     */
+    public function notify(Swift_Mime_Message $message, $address, $result)
+    {
+        if (self::RESULT_PASS == $result) {
+            echo '<div style="color: #fff; background: #006600; padding: 2px; margin: 2px;">'.PHP_EOL;
+            echo 'PASS '.$address.PHP_EOL;
+            echo '</div>'.PHP_EOL;
+            flush();
+        } else {
+            echo '<div style="color: #fff; background: #880000; padding: 2px; margin: 2px;">'.PHP_EOL;
+            echo 'FAIL '.$address.PHP_EOL;
+            echo '</div>'.PHP_EOL;
+            flush();
+        }
+    }
+}