build package

.gitignore

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+# Created by .ignore support plugin (hsz.mobi)
+
+.idea/

Frame/Services/Protocols/Frame.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: fehrim
+ * Date: 2018/11/1
+ * Time: 21:30
+ */
+
+namespace Frame\Services\Protocols;
+
+/**
+ * Frame Protocol.
+ */
+class Frame
+{
+    /**
+     * Check the integrity of the package.
+     *
+     * @param string        $buffer
+     * @return int
+     */
+    public static function input($buffer)
+    {
+        if (strlen($buffer) < 4) {
+            return 0;
+        }
+        $unpack_data = unpack('N'.'total_length', $buffer);
+        return $unpack_data['total_length'];
+    }
+
+    /**
+     * Decode.
+     *
+     * @param string $buffer
+     * @return string
+     */
+    public static function decode($buffer)
+    {
+        return substr($buffer, 4);
+    }
+
+    /**
+     * Encode.
+     *
+     * @param string $buffer
+     * @return string
+     */
+    public static function encode($buffer)
+    {
+        $total_length = 4 + strlen($buffer);
+        return pack('N', $total_length) . $buffer;
+    }
+}