exception_handle配置参数支持使用闭包定义render处理

library/think/Error.php

@@ -110,6 +110,9 @@ class Error
                 $handle = new $class;
             } else {
                 $handle = new Handle;
+                if ($class instanceof \Closure) {
+                    $handle->setRender($class);
+                }
             }
         }
         return $handle;

library/think/exception/Handle.php

@@ -21,11 +21,16 @@ use think\Response;
 
 class Handle
 {
-
+    protected $render;
     protected $ignoreReport = [
         '\\think\\exception\\HttpException',
     ];
 
+    public function setRender($render)
+    {
+        $this->render = $render;
+    }
+
     /**
      * Report or log an exception.
      *
@@ -78,6 +83,13 @@ class Handle
      */
     public function render(Exception $e)
     {
+        if ($this->render && $this->render instanceof \Closure) {
+            $result = call_user_func_array($this->render, [$e]);
+            if ($result) {
+                return $result;
+            }
+        }
+
         if ($e instanceof HttpException) {
             return $this->renderHttpException($e);
         } else {