From f86ce2dcb6b537fba960c4ed5cc8d1c8ec5d1e4f Mon Sep 17 00:00:00 2001
From: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date: Sun, 4 Nov 2012 23:44:33 +0100
Subject: [PATCH] MDL-36364 Improved the deletion logic to preserve the
 'prescan' setting

---
 cache/stores/file/lib.php | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/cache/stores/file/lib.php b/cache/stores/file/lib.php
index 3428d92d63e..90ed0e49687 100644
--- a/cache/stores/file/lib.php
+++ b/cache/stores/file/lib.php
@@ -308,9 +308,13 @@ class cachestore_file implements cache_store, cache_is_key_aware {
     public function delete($key) {
         $filename = $key.'.cache';
         $file = $this->path.'/'.$filename;
-        $result = @unlink($file);
-        unset($this->keys[$filename]);
-        return $result;
+
+        if (@unlink($file)) {
+            unset($this->keys[$filename]);
+            return true;
+        }
+
+        return false;
     }
 
     /**