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system/src/Grav/Common/Errors/SystemFacade.php

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+<?php
+/**
+ * @package    Grav.Common.Errors
+ *
+ * @copyright  Copyright (C) 2015 - 2018 Trilby Media, LLC. All rights reserved.
+ * @license    MIT License; see LICENSE file for details.
+ */
+
+namespace Grav\Common\Errors;
+
+class SystemFacade extends \Whoops\Util\SystemFacade
+{
+    protected $whoopsShutdownHandler;
+
+    /**
+     * @param callable $function
+     *
+     * @return void
+     */
+    public function registerShutdownFunction(callable $function)
+    {
+        $this->whoopsShutdownHandler = $function;
+        register_shutdown_function([$this, 'handleShutdown']);
+    }
+
+    /**
+     * Special case to deal with Fatal errors and the like.
+     */
+    public function handleShutdown()
+    {
+        $error = $this->getLastError();
+
+        // Ignore core warnings and errors.
+        if ($error && !($error['type'] & (E_CORE_WARNING | E_CORE_ERROR))) {
+            $handler = $this->whoopsShutdownHandler;
+            $handler();
+        }
+    }
+}