内核更新

core/library/think/File.php

@@ -195,12 +195,23 @@ class File extends SplFileObject
     {
         $extension = strtolower(pathinfo($this->getInfo('name'), PATHINFO_EXTENSION));
         /* 对图像文件进行严格检测 */
-        if (in_array($extension, ['gif', 'jpg', 'jpeg', 'bmp', 'png', 'swf']) && !in_array(exif_imagetype($this->filename), [1, 2, 3, 4, 6])) {
+        if (in_array($extension, ['gif', 'jpg', 'jpeg', 'bmp', 'png', 'swf']) && !in_array($this->getImageType($this->filename), [1, 2, 3, 4, 6])) {
             return false;
         }
         return true;
     }
 
+    // 判断图像类型
+    protected function getImageType($image)
+    {
+        if (function_exists('exif_imagetype')) {
+            return exif_imagetype($image);
+        } else {
+            $info = getimagesize($image);
+            return $info[2];
+        }
+    }
+
     /**
      * 检测上传文件大小
      * @param  integer   $size    最大大小