Merge pull request #8 from clippings/headers-php-5.6

Fix undefined variable error on PHP 5.6

.travis.yml

@@ -3,4 +3,12 @@ script: phpunit
 
 php:
   - 5.3
-  - 5.4
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - php: 7

lib/Postmark/Inbound.php

@@ -69,24 +69,20 @@ public function FromName()
 
     public function Headers($name = 'X-Spam-Status')
     {
-        foreach($this->Source->Headers as $header)
+        foreach ($this->Source->Headers as $header)
         {
-            if(isset($header->Name) AND $header->Name == $name)
+            if (isset($header->Name) AND $header->Name == $name)
             {
-                if($header->Name == 'Received-SPF')
+                if ($header->Name == 'Received-SPF')
                 {
                     return self::_parseReceivedSpf($header->Value);
                 }
 
                 return $header->Value;
             }
-            else
-            {
-                unset($header);
-            }
         }
 
-        return $header ? $header : FALSE;
+        return FALSE;
     }
 
     private static function _parseReceivedSpf($header)
@@ -137,4 +133,4 @@ public function HasAttachments()
         return count($this->Source->Attachments) > 0 ? TRUE : FALSE;
     }
 
-}
+}