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Logging class (Log messages to a file)

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This class can log messages to a file. If the log file becomes too large (over 1MB), the class will archive it and will create new. If there are archives older than one month, they will be deleted automatically.
In the future versions I will add the opportunity to set max log size and max time to keep the archives.

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  1. <?php
  2. class logger {
  3. 	private $file;
  4. 	private $error = false;
  5.  
  6. 	function __construct($file) {
  7. 		if(file_exists($file) && ((filesize($file) / 1024) > 1024)) {
  8. 			$dirname = dirname($file);
  9. 			$filename = basename($file);
  10. 			$newname = $dirname.'/'.date('d.m.Y').'_'.$filename;
  11. 			if(!rename($file, $newname)) {
  12. 				$this->error = 'Can\'t rename the old log file';
  13. 			}
  14. 			foreach (glob($dirname.'/*.log') as $logfile) {
  15. 				//ако има стари логове на повече от 1 месец
  16. 				if(filemtime($logfile) < (time() - (30 * 24 * 3600))) {
  17. 					unlink($logfile);
  18. 				}
  19. 			}
  20. 			file_put_contents($file, '');
  21. 		}
  22. 		elseif(!file_exists($file)) {
  23. 			file_put_contents($file, '');
  24. 		}
  25. 		$this->file = $file;
  26. 	}
  27.  
  28. 	function log_start() {
  29. 		$msg_start = 'Start time: '.date('d.m.Y h:i:s').PHP_EOL;
  30. 		if(!file_put_contents($this->file, $msg_start, FILE_APPEND)) {
  31. 			$this->error = 'Can\'t write to log';
  32. 		}
  33. 	}
  34.  
  35. 	function log_message($message) {
  36. 		$message = $message.PHP_EOL;
  37. 		if(!file_put_contents($this->file, $message, FILE_APPEND)) {
  38. 			$this->error = 'Can\'t write to log';
  39. 		}
  40. 	}
  41.  
  42. 	function log_end() {
  43. 		$msg_end  = 'End time: '.date('d.m.Y h:i:s').PHP_EOL;
  44. 		$msg_end .= '-------------------------------'.PHP_EOL;
  45. 		if(!file_put_contents($this->file, $msg_end, FILE_APPEND)) {
  46. 			$this->error = 'Can\'t write to log';
  47. 		}
  48. 	}
  49.  
  50. 	function is_error() {
  51. 		if($this->error != false) {
  52. 			return true;
  53. 		}
  54. 		return false;
  55. 	}
  56.  
  57. 	function get_error() {
  58. 		return $this->error;
  59. 	}
  60. }
  61. /* 
  62. example usage 
  63.  
  64. $log = new logger('/path/to/log.txt'); //if file doesnt exiists, will be created
  65. $log->log_start(); //this will insert timestap to mark the beginning
  66. if($sallary < $work) {
  67. 	$log->log_message('Not acceptable sallary/work ratio');
  68. }
  69. $log->log_end(); //this will insert timestap to mark the end of current log
  70.  
  71. */
  72. ?>

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