Updated some outdated code from filepath generator in IOHelper.

Author: Geolim4

lib/Phpfastcache/Core/Pool/IO/IOHelperTrait.php

@@ -100,7 +100,7 @@ protected function getFilePath($keyword, $skip = false): string
             );
         }
 
-        return $path . '/' . $filename . '.' . $this->getConfig()->getCacheFileExtension();
+        return $path . \DIRECTORY_SEPARATOR . $filename . '.' . $this->getConfig()->getCacheFileExtension();
     }
 
     /**
@@ -322,7 +322,7 @@ protected function readFile($file): string
      * @return bool
      * @throws PhpfastcacheIOException
      */
-    protected function writefile($file, $data, $secureFileManipulation = false): bool
+    protected function writefile(string $file, string $data, bool $secureFileManipulation = false): bool
     {
         /**
          * @eventName CacheWriteFileOnDisk
@@ -335,11 +335,10 @@ protected function writefile($file, $data, $secureFileManipulation = false): boo
 
         if ($secureFileManipulation) {
             $tmpFilename = Directory::getAbsolutePath(
-                dirname($file) . '/tmp_' . $this->getConfig()->getDefaultFileNameHashFunction()(
-                    \str_shuffle(\uniqid($this->getDriverName(), false))
-                    . \str_shuffle(\uniqid($this->getDriverName(), false))
+                dirname($file) . \DIRECTORY_SEPARATOR . 'tmp_' . $this->getConfig()->getDefaultFileNameHashFunction()(
+                    \bin2hex(\random_bytes(16))
                 )
-            );
+            ) . '.' .  $this->getConfig()->getCacheFileExtension() . \random_int(1000, 9999);
 
             $handle = \fopen($tmpFilename, 'w+b');
             if (\is_resource($handle)) {

tests/ReadWriteOperations.test.php

@@ -40,7 +40,8 @@
 
         $instances[ $dirIndex ][ $cacheInstanceName ] = CacheManager::getInstance('Files', new FilesConfig([
           'path' => $dir . str_pad($i, 3, '0', STR_PAD_LEFT),
-          'secureFileManipulation' => true
+          'secureFileManipulation' => true,
+          'securityKey' => '_cache',
         ]));
 
         foreach ($keys[ $dirIndex ] as $index => $key) {
@@ -75,4 +76,4 @@
     }
 }
 
-$testHelper->terminateTest();
+$testHelper->terminateTest();