PHP LOG使用心得(2)

<?php
/**
* create by :xiaojiang
* PHP log 类  日志入库功能 仅供交流学习
*/

class Config{
   public static function getConfig (){
      return array(
           'LOG_LEVEL'=>75  //INFO
      );
   }
}
class Log{
  
    private $LogFile;
    private $logLevel;

    const DEBUG  = 100;
    const INFO   = 75;
    const NOTICE = 50;
    const WARNING =25;
    const ERROR   = 10;
    const CRITICAL = 5;
    
    private function __construct(){}

    public static function getInstance($name){
        return Log::backendManager($name);
    }
   
    public static function register($app,$params){
        
        $urlDate = parse_url($params);
        if(!isset( $urlDate['scheme'])){
           throw Exception('invalid log connection');
        }
        @include('Logger/backend'.$urlDate['scheme'].'.class.php');
        $className = $urlDate['scheme'].'backend';
 
        if(!class_exists($className)){
           throw new Exception('invalid className '.$className);
        }
        $backObj = new $className($params);
        Log::backendManager($app,$backObj);
    }
    
    private static function backendManager($name,$obj = null){
      
         static $backends_arr;

         if(!isset($backends)){
              $backends = null;
         }
         if(isset($obj)){
              $backends_arr[$name] = $obj;
         }else{
              if(!isset($backends_arr[$name])){
                  throw new Exception("the specified {$name} was not registered ");
              }
              return $backends_arr[$name];
         }
     
    }


    public function levelToString($logLevel){
         $ret = '[unknow]';
         switch ($logLevel){
                case LOG::DEBUG:
                     $ret = 'LOG::DEBUG';
                     break;
                case LOG::INFO:
                     $ret = 'LOG::INFO';
                     break;
                case LOG::NOTICE:
                     $ret = 'LOG::NOTICE';
                     break;
                case LOG::WARNING:
                     $ret = 'LOG::WARNING';
                     break;
                case LOG::ERROR:
                     $ret = 'LOG::ERROR';
                     break;
                case LOG::CRITICAL:
                     $ret = 'LOG::CRITICAL';
                     break;
         }
         return $ret;
    }
}
try{
   LOG::register('error','http://localhost?user_name=root&dbname=test&table=test&password=');
}catch(Exception $e){
   echo $e->getMessage();
}
try{
    $logIns = LOG::getInstance('error');
}catch(Exception $e){
   echo $e->getMessage();
}
$logIns->LogMessage('哈哈',Log::INFO,'test');

/**
 *  文件 Logger/Httpbackend.class.php
 */


class Httpbackend{

    public function __construct($params){
         
         $Date = parse_url($params);
         parse_str($Date['query'],$url_params);
         $this->db = @mysql_connect($Date['host'],$url_params['user_name'],$url_params['password']);
         if(!is_resource($this->db)){
             throw new Exception('invalid db resource');
         }
         mysql_select_db($url_params['table'],$this->db);
         mysql_set_charset('utf8',$this->db); 
         $this->logLevel = Config::getConfig('LOG_LEVEL');
    }
    public function LogMessage($msg, $log_level = Log::info,$module=null){
       
          if($log_level > $this->logLevel) return ;

          $sql = "INSERT INTO test (`msg`,module,add_time) 
                  VALUES ('{$msg}','{$module}',unix_timestamp())";
          mysql_query($sql,$this->db);                
    }

}
?>