Added Hyperf\WebSocketServer\Constant\Opcode. (#4697)

Author: limingxinleo

src/Constant/Opcode.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * This file is part of Hyperf.
+ *
+ * @link     https://www.hyperf.io
+ * @document https://hyperf.wiki
+ * @contact  group@hyperf.io
+ * @license  https://github.com/hyperf/hyperf/blob/master/LICENSE
+ */
+namespace Hyperf\WebSocketServer\Constant;
+
+class Opcode
+{
+    public const CONTINUATION = 0x0;
+
+    public const TEXT = 0x1;
+
+    public const BINARY = 0x2;
+
+    public const CLOSE = 0x8;
+
+    public const PING = 0x9;
+
+    public const PONG = 0xA;
+}