diff --git a/library/think/cache/driver/File.php b/library/think/cache/driver/File.php
index 95021e05..52243a47 100644
--- a/library/think/cache/driver/File.php
+++ b/library/think/cache/driver/File.php
@@ -226,7 +226,10 @@ class File extends Driver
         $files = (array) glob($this->options['path'] . ($this->options['prefix'] ? $this->options['prefix'] . DS : '') . '*');
         foreach ($files as $path) {
             if (is_dir($path)) {
-                array_map('unlink', glob($path . '/*.php'));
+                $matches = glob($path . '/*.php');
+                if (is_array($matches)) {
+                    array_map('unlink', $matches);
+                }
                 rmdir($path);
             } else {
                 unlink($path);