Merge pull request #2 from Mecanik/Issue#1

Added static in method implementation

src/Engine/ZF3TurboCSSEngine.php

@@ -17,7 +17,7 @@ public function __construct()
     {
     }
 
-    public function minify_css_callback($matches)
+    public static function minify_css_callback($matches)
 	{
         //print_r($matches);
 
@@ -37,7 +37,7 @@ public function minify_css_callback($matches)
 		return "{$openStyleTag}{$css}</style>";
     }
 
-    protected function removeComments($data)
+    protected static function removeComments($data)
     {
         if (false !== strpos($data, '/*')) {
             $data = str_replace("/*","_COMSTART",$data);
@@ -48,7 +48,7 @@ protected function removeComments($data)
         return $data;
     }
 
-    protected function removeCdata($data)
+    protected static function removeCdata($data)
 	{
 		if (false !== strpos($data, '<![CDATA[')) {
 			$data = str_replace('//<![CDATA[', '', $data);
@@ -62,7 +62,7 @@ protected function removeCdata($data)
 		return $data;
     }
 
-    protected function removeSpaces($data)
+    protected static function removeSpaces($data)
     {
         $data = preg_replace("/\s+/u", " ", $data);
         $data = str_replace(' ', '', $data);

src/Engine/ZF3TurboHTMLEngine.php

@@ -17,7 +17,7 @@ public function __construct()
     {
     }
 
-    public function remove_comments_callback($matches)
+    public static function remove_comments_callback($matches)
 	{
 		return (0 === strpos($matches[1], '[') || false !== strpos($matches[1], '<![')) ? $matches[0] : '';
     }

src/Engine/ZF3TurboJSEngine.php

@@ -17,7 +17,7 @@ public function __construct()
     {
     }
 
-    public function minify_js_callback($matches)
+    public static function minify_js_callback($matches)
 	{
 
         $openScriptTag = "<script{$matches[2]}";
@@ -32,14 +32,14 @@ public function minify_js_callback($matches)
 		return "{$openScriptTag}{$js}</script>";
     }
 
-    protected function removeComments($data)
+    protected static function removeComments($data)
     {
         $data = preg_replace('/(?:(?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:(?<!\:|\\\\\|\')\/\/.*))/u', '', $data);
 
         return $data;
     }
 
-    protected function removeSpaces($data)
+    protected static function removeSpaces($data)
     {    
         // remove whitespace from start - end
         $data = trim($data);