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。
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<?php declare(strict_types=1);
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PHPUnit\Util;
use const JSON_PRETTY_PRINT;
use const JSON_UNESCAPED_SLASHES;
use const JSON_UNESCAPED_UNICODE;
use const SORT_STRING;
use function is_object;
use function is_scalar;
use function json_decode;
use function json_encode;
use function json_last_error;
use function ksort;
/**
* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
*
* @internal This class is not covered by the backward compatibility promise for PHPUnit
*/
final class Json
{
/**
* @throws InvalidJsonException
*/
public static function prettify(string $json): string
{
$decodedJson = json_decode($json, false);
if (json_last_error()) {
throw new InvalidJsonException;
}
return json_encode($decodedJson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
}
/**
* To allow comparison of JSON strings, first process them into a consistent
* format so that they can be compared as strings.
*
* @return array ($error, $canonicalized_json) The $error parameter is used
* to indicate an error decoding the json. This is used to avoid ambiguity
* with JSON strings consisting entirely of 'null' or 'false'.
*/
public static function canonicalize(string $json): array
{
$decodedJson = json_decode($json);
if (json_last_error()) {
return [true, null];
}
self::recursiveSort($decodedJson);
$reencodedJson = json_encode($decodedJson);
return [false, $reencodedJson];
}
/**
* JSON object keys are unordered while PHP array keys are ordered.
*
* Sort all array keys to ensure both the expected and actual values have
* their keys in the same order.
*/
private static function recursiveSort(mixed &$json): void
{
// Nulls, empty arrays, and scalars need no further handling.
if (!$json || is_scalar($json)) {
return;
}
$isObject = is_object($json);
if ($isObject) {
// Objects need to be sorted during canonicalization to ensure
// correct comparsion since JSON objects are unordered. It must be
// kept as an object so that the value correctly stays as a JSON
// object instead of potentially being converted to an array. This
// approach ensures that numeric string JSON keys are preserved and
// don't risk being flattened due to PHP's array semantics.
// See #2919, #4584, #4674
$json = (array) $json;
ksort($json, SORT_STRING);
}
foreach ($json as &$value) {
self::recursiveSort($value);
}
if ($isObject) {
$json = (object) $json;
}
}
}