<?php
   
  //Log Levels.  The higher the number, the less severe the message
  //Gaps are left in the numbering to allow for other levels
  //to be added later
  define('LOGGER_DEBUG', 100);
  define('LOGGER_INFO', 75);
  define('LOGGER_NOTICE', 50);
  define('LOGGER_WARNING', 25);
  define('LOGGER_ERROR', 10);
  define('LOGGER_CRITICAL', 5);
  
  class Logger {
  
    private $hLogFile;\; private$logLevel;
  
    //Note: private constructor.  Class uses the singleton pattern
    private function __construct() {
      
    }
  
    public static function register($logName,$connectionString) {
      $urlData\; =\; parse\_url($connectionString);
      
      if(! isset($urlData[\text{'}scheme\text{'}]))\; \{\; throw\; new\; Exception("Invalid\; log\; connection\; string$connectionString");
      }
      
      include_once('Logger/class.' . $urlData[\text{'}scheme\text{'}]\; .\; \text{'}LoggerBackend.php\text{'});$className = $urlData[\text{'}scheme\text{'}]\; .\; \text{'}LoggerBackend\text{'};\; if(!\; class\_exists($className)) {
        throw new Exception('No logging backend available for ' . 
                            $urlData[\text{'}scheme\text{'}]);\; \}$objBack = new $className($urlData);
      
      Logger::manageBackends($logName,$objBack);
    }
    
    public static function getInstance($name)\; \{\; return\; Logger::manageBackends($name);
    }
    
    private static function manageBackends($name,\; LoggerBackend$objBack = null) {
      static $backEnds;\; if(!\; isset($backEnds)) {
        $backEnds\; =\; array();\; \}\; if(!\; isset($objBack)) {
        //we must be retrieving
        if(isset($backEnds[$name])) {
          return $backEnds[$name];
         } else {
          throw new Exception("The specified backend $name\; was\; not\; "\; .\; "registered\; with\; Logger.");\; \}\; \}\; else\; \{$//we must be adding
        backEnds[$name]\; =$objBack;
       }
    }
         
     
     public static function levelToString($logLevel)\; \{\; switch\; ($logLevel) {
        case LOGGER_DEBUG:
          return 'LOGGER_DEBUG';
          break;
        case LOGGER_INFO:
          return 'LOGGER_INFO';
          break;
        case LOGGER_NOTICE:
          return 'LOGGER_NOTICE';
          break;
        case LOGGER_WARNING:
          return 'LOGGER_WARNING';
          break;
        case LOGGER_ERROR:
          return 'LOGGER_ERROR';
          break;
        case LOGGER_CRITICAL:
          return 'LOGGER_CRITICAL';
        default:
          return '[unknown]';
      }
    }
  }
  
  ?>