From 393fccc7f32703fa5379f009c213f00f87a24ef9 Mon Sep 17 00:00:00 2001
From: Alex Pott <alex.a.pott@googlemail.com>
Date: Thu, 2 Oct 2014 13:57:39 +0200
Subject: [PATCH] Issue #1847932 by skwashd: Added Make the UUID pattern a
 constant.

---
 core/lib/Drupal/Component/Uuid/Uuid.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/core/lib/Drupal/Component/Uuid/Uuid.php b/core/lib/Drupal/Component/Uuid/Uuid.php
index 7998adefd1b..d52ebebd060 100644
--- a/core/lib/Drupal/Component/Uuid/Uuid.php
+++ b/core/lib/Drupal/Component/Uuid/Uuid.php
@@ -12,6 +12,11 @@ namespace Drupal\Component\Uuid;
  */
 class Uuid {
 
+  /**
+   * The pattern used to validate a UUID string.
+   */
+  const VALID_PATTERN = '[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}';
+
   /**
    * Checks that a string appears to be in the format of a UUID.
    *
@@ -25,7 +30,7 @@ class Uuid {
    *   TRUE if the string is well formed, FALSE otherwise.
    */
   public static function isValid($uuid) {
-    return (bool) preg_match("/^[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$/", $uuid);
+    return (bool) preg_match('/^' . self::VALID_PATTERN . '$/', $uuid);
   }
 
 }