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
namespace Yoast\WP\SEO\Helpers;
/**
* A helper object for the Yoast products.
*/
class Product_Helper {
/**
* Gets the product name.
*
* @return string
*/
public function get_product_name() {
if ( $this->is_premium() ) {
return 'Yoast SEO Premium';
}
return 'Yoast SEO';
}
/**
* Gets the product name in the head section.
*
* @return string
*/
public function get_name() {
return $this->get_product_name() . ' plugin';
}
/**
* Checks if the installed version is Yoast SEO Premium.
*
* @return bool True when is premium.
*/
public function is_premium() {
return \defined( 'WPSEO_PREMIUM_FILE' );
}
/**
* Gets the Premium version if defined, returns null otherwise.
*
* @return string|null The Premium version or null when premium version is not defined.
*/
public function get_premium_version() {
if ( \defined( 'WPSEO_PREMIUM_VERSION' ) ) {
return \WPSEO_PREMIUM_VERSION;
}
return null;
}
/**
* Gets the version.
*
* @return string The version.
*/
public function get_version() {
return \WPSEO_VERSION;
}
}