Refactored Unpacker. Fixed packing BigEndian.

Author: stefanak-michal

Packer.php

@@ -124,19 +124,27 @@ private function packFloat(float $value): string
     private function packInteger(int $value): string
     {
         $output = '';
+        $tmp = unpack('S', "\x01\x00");
+        $little = $tmp[1] == 1;
 
         if ($value > -1 && $value < 127) { //+TINY_INT
-            $output .= pack('C', 0b00000000 | $value);
+            $packed = pack('C', 0b00000000 | $value);
+            $output .= $little ? strrev($packed) : $packed;
         } elseif ($value > -16 && $value < 0) { //-TINY_INT
-            $output .= pack('c', 0b11110000 | $value);
+            $packed = pack('c', 0b11110000 | $value);
+            $output .= $little ? strrev($packed) : $packed;
         } elseif ($value > -128 && $value < -17) { //INT_8
-            $output .= chr(0xC8) . pack('c', $value);
+            $packed = pack('c', $value);
+            $output .= chr(0xC8) . ($little ? strrev($packed) : $packed);
         } elseif (($value > 128 && $value < 32767) || ($value > -32768 && $value < -129)) { //INT_16
-            $output .= chr(0xC9) . pack('s', $value);
+            $packed = pack('s', $value);
+            $output .= chr(0xC9) . ($little ? strrev($packed) : $packed);
         } elseif (($value > 32768 && $value < 2147483647) || ($value > -2147483648 && $value < -32769)) { //INT_32
-            $output .= chr(0xCA) . pack('l', $value);
+            $packed = pack('l', $value);
+            $output .= chr(0xCA) . ($little ? strrev($packed) : $packed);
         } elseif (($value > 2147483648 && $value < 9223372036854775807) || ($value > -9223372036854775808 && $value < -2147483649)) { //INT_64
-            $output .= chr(0xCB) . pack('q', $value);
+            $packed = pack('q', $value);
+            $output .= chr(0xCB) . ($little ? strrev($packed) : $packed);
         } else {
             throw new Exception('Integer out of range');
         }