Better resource guarding.

Author: Maikuolan

Changelog.md

@@ -73,3 +73,5 @@ __*Why "v3.0.0" instead of "v1.0.0?"*__ Prior to phpMussel v3, the "phpMussel Co
 [2023.09.04; Maikuolan]: The atHit method has been migrated from the Loader class to the Scanner class, affecting some calls to that method at the Web class; Those calls have been updated accordingly.
 
 [2023.09.16~18; Maikuolan]: Significantly refactored all L10N data.
+
+[2023.09.18; Maikuolan]: Better resource guarding.

src/Web.php

@@ -8,7 +8,7 @@
  * License: GNU/GPLv2
  * @see LICENSE.txt
  *
- * This file: Upload handler (last modified: 2023.09.16).
+ * This file: Upload handler (last modified: 2023.09.18).
  */
 
 namespace phpMussel\Web;
@@ -118,7 +118,10 @@ public function __construct(\phpMussel\Core\Loader &$Loader, \phpMussel\Core\Sca
                 $Truncate = $this->Loader->readBytes($this->Loader->Configuration['core']['truncate']);
                 $WriteMode = ($Truncate > 0 && filesize($File) >= $Truncate) ? 'wb' : 'ab';
             }
-            $Stream = fopen($File, $WriteMode);
+            if (!is_resource($Stream = fopen($File, $WriteMode))) {
+                trigger_error('The "writeToUploadsLog" event failed to open "' . $File . '" for writing.');
+                return false;
+            }
             fwrite($Stream, $Data);
             fclose($Stream);
             $this->Loader->logRotation($this->Loader->Configuration['web']['uploads_log']);