[增添]添加了datasource的setting数据库以及默认值

vendor/symfony/mime/Encoder/EncoderInterface.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mime\Encoder;
+
+/**
+ * @author Chris Corbyn
+ */
+interface EncoderInterface
+{
+    /**
+     * Encode a given string to produce an encoded string.
+     *
+     * @param int $firstLineOffset if first line needs to be shorter
+     * @param int $maxLineLength   - 0 indicates the default length for this encoding
+     */
+    public function encodeString(string $string, ?string $charset = 'utf-8', int $firstLineOffset = 0, int $maxLineLength = 0): string;
+}