get file ext from url with GET vars

Author: SmetDenis

src/FS.php

@@ -372,7 +372,10 @@ public static function ext($path)
             $path = preg_replace('#\?(.*)#', '', $path);
         }
 
-        return pathinfo($path, PATHINFO_EXTENSION);
+        $ext = pathinfo($path, PATHINFO_EXTENSION);
+        $ext = strtolower($ext);
+
+        return $ext;
     }
 
     /**

tests/FileSystemTest.php

@@ -316,10 +316,15 @@ public function testExt()
         isSame('', FS::ext(null));
         isSame('', FS::ext(false));
 
+        // URl
         isSame('txt', FS::ext('file.txt?some_var=123456'));
         isSame('txt', FS::ext('file.txt?some_var=123456?invalid=param'));
         isSame('php', FS::ext('http://demo.jbzoo.com/sites/phones/smartfony.php?logic=and&exact=0&controller=search&option=com_zoo&task=filter&type=phone&app_id=1&Itemid=101'));
         isSame('', FS::ext('http://demo.jbzoo.com/sites/phones/smartfony?logic=and&exact=0&controller=search&option=com_zoo&task=filter&type=phone&app_id=1&Itemid=101'));
+
+        // to lower
+        isSame('png', FS::ext('image.PNG'));
+        isSame('png', FS::ext('image.PnG'));
     }
 
     public function testBase()