PHPMailer v6.9.3 hinzufügen – behebt Fatal Error auf Server

- PHPMailer-Quelldateien (PHPMailer.php, SMTP.php, Exception.php) zum Repository hinzugefügt
- .gitignore angepasst: vendor/phpmailer/ und vendor/autoload.php ausgenommen
- Behebt: 'Failed to open stream: No such file or directory' für autoload.php

vendor/autoload.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Simple Autoloader für PHPMailer
+ * Falls Composer nicht verfügbar ist
+ */
+
+spl_autoload_register(function ($class) {
+    // Nur PHPMailer-Klassen laden
+    if (strpos($class, 'PHPMailer\\PHPMailer\\') === 0) {
+        // Namespace in Dateipfad umwandeln
+        $classPath = str_replace('PHPMailer\\PHPMailer\\', '', $class);
+        $file = __DIR__ . '/vendor/phpmailer/phpmailer/src/' . $classPath . '.php';
+        
+        if (file_exists($file)) {
+            require $file;
+        }
+    }
+});

vendor/phpmailer/phpmailer/src/Exception.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * PHPMailer Exception class.
+ * PHP Version 5.5.
+ *
+ * @see       https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project
+ *
+ * @author    Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
+ * @author    Jim Jagielski (jimjag) <jimjag@gmail.com>
+ * @author    Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
+ * @author    Brent R. Matzelle (original founder)
+ * @copyright 2012 - 2020 Marcus Bointon
+ * @copyright 2010 - 2012 Jim Jagielski
+ * @copyright 2004 - 2009 Andy Prevost
+ * @license   https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html GNU Lesser General Public License
+ * @note      This program is distributed in the hope that it will be useful - WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+namespace PHPMailer\PHPMailer;
+
+/**
+ * PHPMailer exception handler.
+ *
+ * @author Marcus Bointon <phpmailer@synchromedia.co.uk>
+ */
+class Exception extends \Exception
+{
+    /**
+     * Prettify error message output.
+     *
+     * @return string
+     */
+    public function errorMessage()
+    {
+        return '<strong>' . htmlspecialchars($this->getMessage(), ENT_COMPAT | ENT_HTML401) . "</strong><br />\n";
+    }
+}