Update monero_gateway.php

monero/monero_gateway.php

@@ -26,6 +26,10 @@ function monero_init() {
 		$methods[] = 'Monero_Gateway';
 		return $methods;
 	}
+	
+	if(!function_exists('curl_version')) {
+        echo "You need CURL Extension in order to use this plugin";
+      }
 }
 
 /*