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vendor/yiisoft/yii2/web/HttpException.php

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+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\web;
+
+use yii\base\UserException;
+
+/**
+ * HttpException represents an exception caused by an improper request of the end-user.
+ *
+ * HttpException can be differentiated via its [[statusCode]] property value which
+ * keeps a standard HTTP status code (e.g. 404, 500). Error handlers may use this status code
+ * to decide how to format the error page.
+ *
+ * Throwing an HttpException like in the following example will result in the 404 page to be displayed.
+ *
+ * ```php
+ * if ($item === null) { // item does not exist
+ *     throw new \yii\web\HttpException(404, 'The requested Item could not be found.');
+ * }
+ * ```
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class HttpException extends UserException
+{
+    /**
+     * @var int HTTP status code, such as 403, 404, 500, etc.
+     */
+    public $statusCode;
+
+
+    /**
+     * Constructor.
+     * @param int $status HTTP status code, such as 404, 500, etc.
+     * @param string $message error message
+     * @param int $code error code
+     * @param \Exception $previous The previous exception used for the exception chaining.
+     */
+    public function __construct($status, $message = null, $code = 0, \Exception $previous = null)
+    {
+        $this->statusCode = $status;
+        parent::__construct($message, $code, $previous);
+    }
+
+    /**
+     * @return string the user-friendly name of this exception
+     */
+    public function getName()
+    {
+        if (isset(Response::$httpStatuses[$this->statusCode])) {
+            return Response::$httpStatuses[$this->statusCode];
+        }
+
+        return 'Error';
+    }
+}