From d5e0517b12ca03c07c0d8c1c2131bf26fe034f20 Mon Sep 17 00:00:00 2001
From: Erayd <steve@erayd.net>
Date: Tue, 21 Mar 2017 12:44:41 +1300
Subject: [PATCH] Enable FILTER_FLAG_EMAIL_UNICODE for email format if present

---
 src/JsonSchema/Constraints/FormatConstraint.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/JsonSchema/Constraints/FormatConstraint.php b/src/JsonSchema/Constraints/FormatConstraint.php
index 87c1dc57..f03e6520 100644
--- a/src/JsonSchema/Constraints/FormatConstraint.php
+++ b/src/JsonSchema/Constraints/FormatConstraint.php
@@ -124,7 +124,12 @@ public function check(&$element, $schema = null, JsonPointer $path = null, $i =
                 break;
 
             case 'email':
-                if (null === filter_var($element, FILTER_VALIDATE_EMAIL, FILTER_NULL_ON_FAILURE)) {
+                $filterFlags = FILTER_NULL_ON_FAILURE;
+                if (defined('FILTER_FLAG_EMAIL_UNICODE')) {
+                    // Only available from PHP >= 7.1.0, so ignore it for coverage checks
+                    $filterFlags |= constant('FILTER_FLAG_EMAIL_UNICODE'); // @codeCoverageIgnore
+                }
+                if (null === filter_var($element, FILTER_VALIDATE_EMAIL, $filterFlags)) {
                     $this->addError(ConstraintError::FORMAT_EMAIL(), $path, array('format' => $schema->format));
                 }
                 break;