神兽保佑

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 *       ┌──┘ ┴───────┘ ┴──┐
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 *       │       ───       │
 *       │  ─┬┘       └┬─  │
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 *       │       ─┴─       │
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 *       └───┐         ┌───┘
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 *           │         └──────────────┐
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 *           └─┐  ┐  ┌───────┬──┐  ┌──┘
 *             │ ─┤ ─┤       │ ─┤ ─┤
 *             └──┴──┘       └──┴──┘
 *                 神兽保佑
 * +----------------------------------------------------------------------
 * |  [I Am A program Dragon]   [Code php ]
 * +----------------------------------------------------------------------
 * | Copyright (c) 2018 liu  All rights reserved.
 * +----------------------------------------------------------------------
 * | Author: liu  
 * +----------------------------------------------------------------------
 */