晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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<?php
/*
 * CKFinder
 * ========
 * http://ckfinder.com
 * Copyright (C) 2007-2010, CKSource - Frederico Knabben. All rights reserved.
 *
 * The software, this file and its contents are subject to the CKFinder
 * License. Please read the license.txt file before using, installing, copying,
 * modifying or distribute this file or part of its contents. The contents of
 * this file is part of the Source Code of CKFinder.
 */
if (!defined('IN_CKFINDER')) exit;

/**
 * @package CKFinder
 * @subpackage Utils
 * @copyright CKSource - Frederico Knabben
 */

/**
 * Simple class which provides some basic API for creating XML nodes and adding attributes
 *
 * @package CKFinder
 * @subpackage Utils
 * @copyright CKSource - Frederico Knabben
 */
class Ckfinder_Connector_Utils_XmlNode
{
    /**
     * Array that stores XML attributes
     *
     * @access private
     * @var array
     */
    private $_attributes = array();
    /**
     * Array that stores child nodes
     *
     * @access private
     * @var array
     */
    private $_childNodes = array();
    /**
     * Node name
     *
     * @access private
     * @var string
     */
    private $_name;
    /**
     * Node value
     *
     * @access private
     * @var string
     */
    private $_value;

    /**
     * Create new node
     *
     * @param string $nodeName node name
     * @param string $nodeValue node value
     * @return Ckfinder_Connector_Utils_XmlNode
     */
    function __construct($nodeName, $nodeValue = null)
    {
        $this->_name = $nodeName;
        if (!is_null($nodeValue)) {
            $this->_value = $nodeValue;
        }
    }

    function getChild($name)
    {
        foreach ($this->_childNodes as $i => $node) {
            if ($node->_name == $name) {
                return $this->_childNodes[$i];
            }
        }
        return null;
    }

    /**
     * Add attribute
     *
     * @param string $name
     * @param string $value
     * @access public
     */
    public function addAttribute($name, $value)
    {
        $this->_attributes[$name] = $value;
    }

    /**
     * Get attribute value
     *
     * @param string $name
     * @access public
     */
    public function getAttribute($name)
    {
        return $this->_attributes[$name];
    }

    /**
     * Set element value
     *
     * @param string $name
     * @param string $value
     * @access public
     */
    public function setValue($value)
    {
        $this->_value = $value;
    }

    /**
     * Get element value
     *
     * @param string $name
     * @param string $value
     * @access public
     */
    public function getValue()
    {
        return $this->_value;
    }

    /**
     * Adds new child at the end of the children
     *
     * @param Ckfinder_Connector_Utils_XmlNode $node
     * @access public
     */
    public function addChild(&$node)
    {
        $this->_childNodes[] =& $node;
    }

    /**
     * Return a well-formed XML string based on Ckfinder_Connector_Utils_XmlNode element
     *
     * @return string
     * @access public
     */
    public function asXML()
    {
        $ret = "<" . $this->_name;

        //print Attributes
        if (sizeof($this->_attributes)>0) {
            foreach ($this->_attributes as $_name => $_value) {
                $ret .= " " . $_name . '="' . htmlspecialchars($_value) . '"';
            }
        }

        //if there is nothing more todo, close empty tag and exit
        if (is_null($this->_value) && !sizeof($this->_childNodes)) {
            $ret .= " />";
            return $ret;
        }

        //close opening tag
        $ret .= ">";

        //print value
        if (!is_null($this->_value)) {
            $ret .= htmlspecialchars($this->_value);
        }

        //print child nodes
        if (sizeof($this->_childNodes)>0) {
            foreach ($this->_childNodes as $_node) {
                $ret .= $_node->asXml();
            }
        }

        $ret .= "</" . $this->_name . ">";

        return $ret;
    }
}