Simple listener INP Paypal using laravel 4.2

IPNPaypalLaravel.php

<?php

    class IpnListnerController extends \BaseController {

	private $sandbox	= true;
	private $notify_email	= true;
	private $receiver_email	= 'seller@paypalsandbox.com';
	
	protected function listener(){
		
	    $endpoint = ($this->sandbox) ? 'https://www.sandbox.paypal.com' : 'https://www.paypal.com';
	    $endpoint .= '/cgi-bin/webscr?cmd=_notify-validate';
	    
	    if ($_SERVER['REQUEST_METHOD'] == 'POST') {            
	
	        $curl = curl_init();
		
		curl_setopt($curl, CURLOPT_URL, $endpoint);
		curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($curl, CURLOPT_POST, true);
		curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($_POST));
		
		$response = curl_exec($curl);
		$error    = curl_error($curl);
		$errno    = curl_errno($curl);
		
		curl_close($curl);
		    
		if (empty($error) && $errno == 0) {
		    if ($response == 'VERIFIED') {
		        if (Input::get('receiver_email') == $this->receiver_email) {
		            // Update your database or whatever...
		        }
		    }else{
		        // handle error...
		    }
		}
		
		if ($this->notify_email) {
		    Mail::send('emails.notify.paypal', array( 'data' => $data ), function($message)
		    {
		      	try {
		      	    $message->from('sender@yoursitedomain.com', 'Notification Paypal');
		      	    $message->to('your_email@yourdomain.com', 'Your Name')->subject('Notification Paypal');
		      	} catch (Exception $e) {
		      	    // Throws exception		
		      	}
		    });
		}           
			
	    }
	    
	}
    }