Handle empty files due to upload_max_filesize

CHANGELOG.md

@@ -7,6 +7,7 @@
     * Improved image background overlay and tools
     * Update all Form classes to rely on `PageInterface` instead of `Page` class
     * Removed `media.upload_limit` references
+    * Improve error when upload exceeds `upload_max_filesize`
 1. [](#bugfix)
     * Incorrect 2FA lang code [#1618](https://github.com/getgrav/grav-plugin-admin/issues/1618)
     * Fixed potential undefined property in `onPageNotFound` event handling

classes/admincontroller.php

@@ -1567,6 +1567,15 @@ class AdminController extends AdminBaseController
         /** @var Config $config */
         $config = $this->grav['config'];
 
+        if (!isset($_FILES) || empty($_FILES)) {
+            $this->admin->json_response = [
+                'status'  => 'error',
+                'message' => $this->admin::translate('PLUGIN_ADMIN.EXCEEDED_POSTMAX_LIMIT')
+            ];
+
+            return false;
+        }
+
         if (!isset($_FILES['file']['error']) || is_array($_FILES['file']['error'])) {
             $this->admin->json_response = [
                 'status'  => 'error',

languages/en.yaml

@@ -178,7 +178,8 @@ PLUGIN_ADMIN:
   NO_PAGE_FOUND: "No Page found"
   INVALID_PARAMETERS: "Invalid Parameters"
   NO_FILES_SENT: "No files sent"
-  EXCEEDED_FILESIZE_LIMIT: "Exceeded PHP configuration file size limit"
+  EXCEEDED_FILESIZE_LIMIT: "Exceeded PHP configuration upload_max_filesize"
+  EXCEEDED_POSTMAX_LIMIT: "Exceeded PHP configuration post_max_size"
   UNKNOWN_ERRORS: "Unknown errors"
   EXCEEDED_GRAV_FILESIZE_LIMIT: "Exceeded Grav configuration file size limit"
   UNSUPPORTED_FILE_TYPE: "Unsupported file type"