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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Current File : /home/rainic/www/oldTZh/wp-content/plugins/gravityforms/includes/logging/includes/KLogger.php
<?php
	
	/* Finally, A light, permissions-checking logging class. 
	 * 
	 * Author	: Kenneth Katzgrau < katzgrau@gmail.com >
	 * Date	    : July 26, 2008
	 * Comments	: Originally written for use with wpSearch
	 * Website	: http://codefury.net
	 * Version	: 0.2m
	 *
	 * Usage: 
	 *		$log = new KLogger ( "log.txt" , KLogger::INFO );
	 *		$log->LogInfo("Returned a million search results");	//Prints to the log file
	 *		$log->LogFATAL("Oh dear.");				//Prints to the log file
	 *		$log->LogDebug("x = 5");					//Prints nothing due to priority setting
	*/
	
	class KLogger
	{
		
		const DEBUG 	= 1;	// Most Verbose
		const INFO 		= 2;	// ...
		const WARN 		= 3;	// ...
		const ERROR 	= 4;	// ...
		const FATAL 	= 5;	// Least Verbose
		const OFF 		= 6;	// Nothing at all.
		
		const LOG_OPEN 		= 1;
		const OPEN_FAILED 	= 2;
		const LOG_CLOSED 	= 3;
		
		/* Public members: Not so much of an example of encapsulation, but that's okay. */
		public $Log_Status 	= KLogger::LOG_CLOSED;
		public $DateFormat	= "Y-m-d G:i:s";
		public $MessageQueue;
		private $offset;
		private $log_file;
		private $priority = KLogger::INFO;
		
		private $file_handle;
		
		public function __construct( $filepath , $priority, $offset = 0 )
		{
			if ( $priority == KLogger::OFF ) return;
			
			$this->offset = $offset;
			$this->log_file = $filepath;
			$this->MessageQueue = array();
			$this->priority = $priority;
			
			if ( file_exists( $this->log_file ) )
			{
				if ( !is_writable($this->log_file) )
				{
					$this->Log_Status = KLogger::OPEN_FAILED;
					$this->MessageQueue[] = "The file exists, but could not be opened for writing. Check that appropriate permissions have been set.";
					return;
				}
			}
			
			if ( $this->file_handle = fopen( $this->log_file , "a" ) )
			{
				$this->Log_Status = KLogger::LOG_OPEN;
				$this->MessageQueue[] = "The log file was opened successfully.";
			}
			else
			{
				$this->Log_Status = KLogger::OPEN_FAILED;
				$this->MessageQueue[] = "The file could not be opened. Check permissions.";
			}
			
			return;
		}
		
		public function __destruct()
		{
			if ( $this->file_handle )
				fclose( $this->file_handle );
		}
		
		public function LogInfo($line)
		{
			$this->Log( $line , KLogger::INFO );
		}
		
		public function LogDebug($line)
		{
			$this->Log( $line , KLogger::DEBUG );
		}
		
		public function LogWarn($line)
		{
			$this->Log( $line , KLogger::WARN );	
		}
		
		public function LogError($line)
		{
			$this->Log( $line , KLogger::ERROR );		
		}

		public function LogFatal($line)
		{
			$this->Log( $line , KLogger::FATAL );
		}
		
		public function Log($line, $priority)
		{
			if ( $this->priority <= $priority )
			{
				$status = $this->getTimeLine( $priority );
				$this->WriteFreeFormLine ( "$status $line \n" );
			}
		}
		
		public function WriteFreeFormLine( $line )
		{
			if ( $this->Log_Status == KLogger::LOG_OPEN && $this->priority != KLogger::OFF )
			{
			    if (fwrite( $this->file_handle , $line ) === false) {
			        $this->MessageQueue[] = "The file could not be written to. Check that appropriate permissions have been set.";
			    }
			}
		}
		
		private function getTimeLine( $level )
		{
			
			if ( class_exists( 'DateTime' ) ) {
				$original_time = microtime( true ) + $this->offset;
				$microtime     = sprintf( '%06d', ( $original_time - floor( $original_time ) ) * 1000000 );
				$date          = new DateTime( date( 'Y-m-d H:i:s.' . $microtime, (int) $original_time ) );
				$time          = $date->format( $this->DateFormat );
			
			} else {
				$time          = gmdate($this->DateFormat, time() + $this->offset);
			}
			
			switch( $level )
			{
				case KLogger::INFO:
					return "$time - INFO  -->";
				case KLogger::WARN:
					return "$time - WARN  -->";				
				case KLogger::DEBUG:
					return "$time - DEBUG -->";				
				case KLogger::ERROR:
					return "$time - ERROR -->";
				case KLogger::FATAL:
					return "$time - FATAL -->";
				default:
					return "$time - LOG   -->";
			}
		}
		
	}


?>

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