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
require_once 'tutorial_autoload.php';

// Create a custom class implementing the singleton pattern
class customSingleton
{
    protected static $instance;

    public static function getInstance()
    {
        if ( self::$instance === null )
        {
            self::$instance = new customSingleton();
            ezcBaseInit::fetchConfig( 'customKey', self::$instance );
        }

        return self::$instance;
    }
}

// Implement your configuration class
class customSingletonConfiguration implements ezcBaseConfigurationInitializer
{
    public static function configureObject( $object )
    {
        echo "Configure customSingleton.\n";
        $object->value = 42;
    }
}

// Register for lazy initilization
ezcBaseInit::setCallback( 'customKey', 'customSingletonConfiguration' );

// Configure on first initilization
$object = customSingleton::getInstance();
var_dump( $object->value );

?>