From 91b665c12ae6e00de8b74cf666eff24fc26d54cf Mon Sep 17 00:00:00 2001
From: apetitpa <arnaudpetitpas@protonmail.ch>
Date: Fri, 24 Mar 2017 16:26:16 +0100
Subject: [PATCH] Switch to `is_string` native method

---
 src/Symfony/Component/Validator/Constraints/UrlValidator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Validator/Constraints/UrlValidator.php b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
index 7e3a074e6c..a12dc14979 100644
--- a/src/Symfony/Component/Validator/Constraints/UrlValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
@@ -80,7 +80,7 @@ class UrlValidator extends ConstraintValidator
         if ($constraint->checkDNS) {
             $host = parse_url($value, PHP_URL_HOST);
 
-            if ('' === $host || !checkdnsrr($host, 'ANY')) {
+            if (!is_string($host) || !checkdnsrr($host, 'ANY')) {
                 if ($this->context instanceof ExecutionContextInterface) {
                     $this->context->buildViolation($constraint->dnsMessage)
                        ->setParameter('{{ value }}', $this->formatValue($host))