From b7698c4d8500a8cab4e3b664758a0dacc3500319 Mon Sep 17 00:00:00 2001
From: lion <120344285@qq.com>
Date: Mon, 20 Apr 2026 15:48:07 +0800
Subject: [PATCH] =?UTF-8?q?=E5=9C=BA=E9=A6=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 bootstrap/mime_content_type_polyfill.php | 33 ++++++++++++++++++++++++
 composer.json                            |  5 +++-
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 bootstrap/mime_content_type_polyfill.php

diff --git a/bootstrap/mime_content_type_polyfill.php b/bootstrap/mime_content_type_polyfill.php
new file mode 100644
index 0000000..a074ec7
--- /dev/null
+++ b/bootstrap/mime_content_type_polyfill.php
@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * 未启用 PHP fileinfo 扩展时，原生 mime_content_type() 不存在，PhpSpreadsheet 等库会报错。
+ * 仅在缺失时提供极简实现（按扩展名推断），生产环境仍建议启用 extension=fileinfo。
+ */
+if (! function_exists('mime_content_type')) {
+    function mime_content_type(string $filename): string|false
+    {
+        if ($filename === '' || ! is_readable($filename)) {
+            return false;
+        }
+
+        $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
+
+        $map = [
+            'png' => 'image/png',
+            'jpg' => 'image/jpeg',
+            'jpeg' => 'image/jpeg',
+            'gif' => 'image/gif',
+            'webp' => 'image/webp',
+            'bmp' => 'image/bmp',
+            'tif' => 'image/tiff',
+            'tiff' => 'image/tiff',
+            'svg' => 'image/svg+xml',
+            'emf' => 'application/octet-stream',
+            'wmf' => 'application/x-msmetafile',
+            'bin' => 'application/octet-stream',
+        ];
+
+        return $map[$ext] ?? 'application/octet-stream';
+    }
+}
diff --git a/composer.json b/composer.json
index aab6af3..2c21f9a 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,10 @@
             "App\\": "app/",
             "Database\\Factories\\": "database/factories/",
             "Database\\Seeders\\": "database/seeders/"
-        }
+        },
+        "files": [
+            "bootstrap/mime_content_type_polyfill.php"
+        ]
     },
     "autoload-dev": {
         "psr-4": {