initial commit of SVN release repo

inc/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/ExceptionHandler.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Calculation;
+
+class ExceptionHandler
+{
+    /**
+     * Register errorhandler.
+     */
+    public function __construct()
+    {
+        set_error_handler([Exception::class, 'errorHandlerCallback'], E_ALL);
+    }
+
+    /**
+     * Unregister errorhandler.
+     */
+    public function __destruct()
+    {
+        restore_error_handler();
+    }
+}