diff --git a/php/src/GildedRose.php b/php/src/GildedRose.php
index cfb7f78a..33a29b76 100644
--- a/php/src/GildedRose.php
+++ b/php/src/GildedRose.php
@@ -4,7 +4,9 @@ declare(strict_types=1);
 
 namespace GildedRose;
 
-final class GildedRose
+use GildedRose\GildedRoseInterface;
+
+final class GildedRose implements GildedRoseInterface
 {
     /**
      * @var Item[]
@@ -19,51 +21,70 @@ final class GildedRose
     public function updateQuality(): void
     {
         foreach ($this->items as $item) {
-            if ($item->name != 'Aged Brie' and $item->name != 'Backstage passes to a TAFKAL80ETC concert') {
-                if ($item->quality > 0) {
-                    if ($item->name != 'Sulfuras, Hand of Ragnaros') {
-                        $item->quality = $item->quality - 1;
-                    }
-                }
-            } else {
-                if ($item->quality < 50) {
-                    $item->quality = $item->quality + 1;
-                    if ($item->name == 'Backstage passes to a TAFKAL80ETC concert') {
-                        if ($item->sell_in < 11) {
-                            if ($item->quality < 50) {
-                                $item->quality = $item->quality + 1;
-                            }
-                        }
-                        if ($item->sell_in < 6) {
-                            if ($item->quality < 50) {
-                                $item->quality = $item->quality + 1;
-                            }
-                        }
-                    }
+
+            $this->firstProcessingRule($item);
+
+            $this->secondProcessingRule($item);
+
+            $this->thirdProcessingRule($item);
+        }
+    }
+
+    public function firstProcessingRule(&$item)
+    {
+
+        if ($item->name != 'Aged Brie' and $item->name != 'Backstage passes to a TAFKAL80ETC concert') {
+            if ($item->quality > 0) {
+                if ($item->name != 'Sulfuras, Hand of Ragnaros') {
+                    $item->quality = $item->quality - 1;
                 }
             }
-
-            if ($item->name != 'Sulfuras, Hand of Ragnaros') {
-                $item->sell_in = $item->sell_in - 1;
-            }
-
-            if ($item->sell_in < 0) {
-                if ($item->name != 'Aged Brie') {
-                    if ($item->name != 'Backstage passes to a TAFKAL80ETC concert') {
-                        if ($item->quality > 0) {
-                            if ($item->name != 'Sulfuras, Hand of Ragnaros') {
-                                $item->quality = $item->quality - 1;
-                            }
+        } else {
+            if ($item->quality < 50) {
+                $item->quality = $item->quality + 1;
+                if ($item->name == 'Backstage passes to a TAFKAL80ETC concert') {
+                    if ($item->sell_in < 11) {
+                        if ($item->quality < 50) {
+                            $item->quality = $item->quality + 1;
                         }
-                    } else {
-                        $item->quality = $item->quality - $item->quality;
                     }
-                } else {
-                    if ($item->quality < 50) {
-                        $item->quality = $item->quality + 1;
+                    if ($item->sell_in < 6) {
+                        if ($item->quality < 50) {
+                            $item->quality = $item->quality + 1;
+                        }
                     }
                 }
             }
         }
     }
+
+    public function secondProcessingRule(&$item)
+    {
+        if ($item->name != 'Sulfuras, Hand of Ragnaros') {
+            $item->sell_in = $item->sell_in - 1;
+        }
+
+    }
+
+    public function thirdProcessingRule(&$item)
+    {
+        if ($item->sell_in < 0) {
+            if ($item->name != 'Aged Brie') {
+                if ($item->name != 'Backstage passes to a TAFKAL80ETC concert') {
+                    if ($item->quality > 0) {
+                        if ($item->name != 'Sulfuras, Hand of Ragnaros') {
+                            $item->quality = $item->quality - 1;
+                        }
+                    }
+                } else {
+                    $item->quality = $item->quality - $item->quality;
+                }
+            } else {
+                if ($item->quality < 50) {
+                    $item->quality = $item->quality + 1;
+                }
+            }
+        }
+    }
+
 }
diff --git a/php/src/GildedRoseInterface.php b/php/src/GildedRoseInterface.php
new file mode 100644
index 00000000..65e82f3a
--- /dev/null
+++ b/php/src/GildedRoseInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+
+namespace GildedRose;
+
+use GildedRose\Item;
+
+interface GildedRoseInterface
+{
+    public function updateQuality();
+
+    public function firstProcessingRule(Item &$item);
+
+    public function secondProcessingRule(Item &$item);
+
+    public function thirdProcessingRule(Item &$item);
+
+}
\ No newline at end of file