From 7b9ff1c11b0b4abd4000f62d24ca9ccadacabab8 Mon Sep 17 00:00:00 2001
From: phlyper <phlyper@live.fr>
Date: Fri, 26 Feb 2016 22:39:48 +0100
Subject: [PATCH] verify exists index 0 in $ref

exemple

i have to get the referrer url from any page if exists

```
class AppController extends Controller {
......
    public function beforeRender() {
        parent::beforeRender();
        $this->params['referer'] = $this->referer(null, true);
    }
..........
}
```
---
 lib/Cake/Network/CakeRequest.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Cake/Network/CakeRequest.php b/lib/Cake/Network/CakeRequest.php
index 4ea520280fa..8933822e4da 100644
--- a/lib/Cake/Network/CakeRequest.php
+++ b/lib/Cake/Network/CakeRequest.php
@@ -448,7 +448,7 @@ public function referer($local = false) {
 		if (!empty($ref) && !empty($base)) {
 			if ($local && strpos($ref, $base) === 0) {
 				$ref = substr($ref, strlen($base));
-				if ($ref[0] !== '/') {
+				if (isset($ref[0]) && $ref[0] !== '/') {
 					$ref = '/' . $ref;
 				}
 				return $ref;