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

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Finder\Adapter;

use Symfony\Component\Finder\Iterator;

/**
 * PHP finder engine implementation.
 *
 * @author Jean-François Simon <contact@jfsimon.fr>
 */
class PhpAdapter extends AbstractAdapter
{
    /**
     * {@inheritdoc}
     */
    public function searchInDirectory($dir)
    {
        $flags = \RecursiveDirectoryIterator::SKIP_DOTS;

        if ($this->followLinks) {
            $flags |= \RecursiveDirectoryIterator::FOLLOW_SYMLINKS;
        }

        $iterator = new \RecursiveIteratorIterator(
            new Iterator\RecursiveDirectoryIterator($dir, $flags, $this->ignoreUnreadableDirs),
            \RecursiveIteratorIterator::SELF_FIRST
        );

        if ($this->minDepth > 0 || $this->maxDepth < PHP_INT_MAX) {
            $iterator = new Iterator\DepthRangeFilterIterator($iterator, $this->minDepth, $this->maxDepth);
        }

        if ($this->mode) {
            $iterator = new Iterator\FileTypeFilterIterator($iterator, $this->mode);
        }

        if ($this->exclude) {
            $iterator = new Iterator\ExcludeDirectoryFilterIterator($iterator, $this->exclude);
        }

        if ($this->names || $this->notNames) {
            $iterator = new Iterator\FilenameFilterIterator($iterator, $this->names, $this->notNames);
        }

        if ($this->contains || $this->notContains) {
            $iterator = new Iterator\FilecontentFilterIterator($iterator, $this->contains, $this->notContains);
        }

        if ($this->sizes) {
            $iterator = new Iterator\SizeRangeFilterIterator($iterator, $this->sizes);
        }

        if ($this->dates) {
            $iterator = new Iterator\DateRangeFilterIterator($iterator, $this->dates);
        }

        if ($this->filters) {
            $iterator = new Iterator\CustomFilterIterator($iterator, $this->filters);
        }

        if ($this->sort) {
            $iteratorAggregate = new Iterator\SortableIterator($iterator, $this->sort);
            $iterator = $iteratorAggregate->getIterator();
        }

        if ($this->paths || $this->notPaths) {
            $iterator = new Iterator\PathFilterIterator($iterator, $this->paths, $this->notPaths);
        }

        return $iterator;
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'php';
    }

    /**
     * {@inheritdoc}
     */
    protected function canBeUsed()
    {
        return true;
    }
}