Get rid of regexp

Author: zyuhel

src/Adapters/N500px.php

@@ -28,12 +28,10 @@ public static function check(Request $request)
      */
     public function getCode()
     {
-        $url=$this->getUrl();
-        $matches=array();
-        preg_match('#(https?://500px.com/photo/\d+)#si',$this->getUrl(),$matches);        
-        if (isset($matches[1]) && $matches[1]) {
-           return Utils::iframe($matches[1].'/embed.html', $this->getWidth(), $this->getHeight());
-        }       
+        if (is_numeric($this->request->getDirectoryPosition(1))) {            
+           return Utils::iframe($this->request->createUrl()->withDirectoryPosition(2,'embed.html'), $this->width, $this->height);
+        }
+
         return '';          
     }
 

src/Providers/OEmbed/N500px.php

@@ -14,12 +14,10 @@ class N500px extends OEmbedImplementation
      */
     public static function getEndPoint(Url $url)
     {
-    	$matches=array();
-    	preg_match('#(https?://500px.com/photo/\d+/)#si', $url->getUrl(),$matches);
 
-    	if (isset($matches[1]) && $matches[1]) {
-    		return $matches[1].'/oembed.json';
-    	}	
+		if (is_numeric($this->request->getDirectoryPosition(1))) {         
+           return $this->request->createUrl()->withDirectoryPosition(2,'oembed.json');
+        }    	
         return '';
     }