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　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。 . Prv8 Shell

Server : Apache
System : Linux srv.rainic.com 4.18.0-553.47.1.el8_10.x86_64 #1 SMP Wed Apr 2 05:45:37 EDT 2025 x86_64
User : rainic ( 1014)
PHP Version : 7.4.33
Disable Function : exec,passthru,shell_exec,system
Directory : /home/stando/www/wp-content/plugins/w3-total-cache/

Upload File :

Current File : /home/stando/www/wp-content/plugins/w3-total-cache/Cache.php

<?php
namespace W3TC;

/**
 * W3 Cache class
 */

/**
 * class Cache
 */
class Cache {
	/**
	 * Returns cache engine instance
	 *
	 * @param string  $engine
	 * @param array   $config
	 * @return W3_Cache_Base
	 */
	static function instance( $engine, $config = array() ) {
		static $instances = array();

		// common configuration data
		if ( !isset( $config['blog_id'] ) )
			$config['blog_id'] = Util_Environment::blog_id();

		$instance_key = sprintf( '%s_%s', $engine, md5( serialize( $config ) ) );

		if ( !isset( $instances[$instance_key] ) ) {
			switch ( $engine ) {
			case 'apc':
				if ( function_exists( 'apcu_store' ) )
					$instances[$instance_key] = new Cache_Apcu( $config );
				else if ( function_exists( 'apc_store' ) )
						$instances[$instance_key] = new Cache_Apc( $config );
					break;

			case 'eaccelerator':
				$instances[$instance_key] = new Cache_Eaccelerator( $config );
				break;

			case 'file':
				$instances[$instance_key] = new Cache_File( $config );
				break;

			case 'file_generic':
				$instances[$instance_key] = new Cache_File_Generic( $config );
				break;

			case 'memcached':
				if ( class_exists( '\Memcached' ) ) {
					$instances[$instance_key] = new Cache_Memcached( $config );
				} elseif ( class_exists( '\Memcache' ) ) {
					$instances[$instance_key] = new Cache_Memcache( $config );
				}
				break;

			case 'nginx_memcached':
				$instances[$instance_key] = new Cache_Nginx_Memcached( $config );
				break;

			case 'redis':
				$instances[$instance_key] = new Cache_Redis( $config );
				break;

			case 'wincache':
				$instances[$instance_key] = new Cache_Wincache( $config );
				break;

			case 'xcache':
				$instances[$instance_key] = new Cache_Xcache( $config );
				break;

			default:
				trigger_error( 'Incorrect cache engine ' . $engine, E_USER_WARNING );
				$instances[$instance_key] = new Cache_Base( $config );
				break;
			}

			if ( !isset( $instances[$instance_key] ) ||
				!$instances[$instance_key]->available() ) {
				$instances[$instance_key] = new Cache_Base( $config );
			}
		}

		return $instances[$instance_key];
	}

	/**
	 * Returns caching engine name
	 *
	 * @param unknown $engine
	 * @param unknown $module
	 *
	 * @return string
	 */
	static public function engine_name( $engine, $module = '' ) {
		switch ( $engine ) {
		case 'memcached':
			if ( class_exists( 'Memcached' ) )
				$engine_name = 'memcached';
			else
				$engine_name = 'memcache';

			break;

		case 'nginx_memcached':
			$engine_name = 'nginx + memcached';
			break;

		case 'apc':
			$engine_name = 'apc';
			break;

		case 'eaccelerator':
			$engine_name = 'eaccelerator';
			break;

		case 'redis':
			$engine_name = 'redis';
			break;

		case 'xcache':
			$engine_name = 'xcache';
			break;

		case 'wincache':
			$engine_name = 'wincache';
			break;

		case 'file':
			if ( $module == 'pgcache' )
				$engine_name = 'disk: basic';
			else
				$engine_name = 'disk';
			break;

		case 'file_generic':
			$engine_name = 'disk: enhanced';
			break;

		case 'ftp':
			$engine_name = 'self-hosted / file transfer protocol upload';
			break;

		case 's3':
			$engine_name = 'amazon simple storage service (s3)';
			break;

		case 's3_compatible':
			$engine_name = 's3 compatible';
			break;

		case 'cf':
			$engine_name = 'amazon cloudfront';
			break;

		case 'google_drive':
			$engine_name = 'google drive';
			break;

		case 'highwinds':
			$engine_name = 'highwinds';
			break;

		case 'cf2':
			$engine_name = 'amazon cloudfront';
			break;

		case 'rscf':
			$engine_name = 'rackspace cloud files';
			break;

		case 'azure':
			$engine_name = 'microsoft azure storage';
			break;

		case 'edgecast':
			$engine_name = 'media template procdn / edgecast';
			break;

		case 'att':
			$engine_name = 'at&amp;t';
			break;

		case 'rackspace_cdn':
			$engine_name = 'rackspace';
			break;

		case 'stackpath2':
			$engine_name = 'stackpath';
			break;

		default:
			$engine_name = $engine;
			break;
		}

		return $engine_name;
	}

}

haha - 2025