PHP创建日志记录（已封装）

<?php

class Logs{
    private $_filepath;   //文件路径
    private $_filename;   //文件名
    private $_filehandle; //文件引擎


     public function Logs($dir = null,$filename = null){
     
     $this->_filepath = empty($dir) ? '': $dir;
     $this->_filename = empty($filename) ? date('Y-m-d',time()).'.log' : $filename;
    
    //创建路径
     $path = $this->_createPath($this->_filepath,$this->_filename);

     if(!$this->_isExist($path)){//如果日志目录不存在

        if(!empty($this->_filepath)){  //如果路径不存在
 
          if(!$this->_createDir($this->_filepath)){//创建路径
           die("创建日志目录不成功");
          }
        }

        if(!$this->_createLogFile($path)){//创建日志
         die("创建日志文件不成功");
        }
     }
    

     $path = $this->_createPath($this->_filepath,$this->_filename);
     //创建日志文件
     $this->_filehandle=fopen($path,"a+");
     }
    
    
     public function setLog($log) //写日志
    {
         //写日志
         $str = "";
         if(is_array($log)){
            foreach($log as $k => $v){
               $str .= $k." : ".$v."\n";
            }
         }else{
            $str = $log."\n";
         }
        
        
        if(!fwrite($this->_filehandle,$str)){//写日志
            die("写日志错误");
        }
     }
    
    
     private function _isExist($path){
     return file_exists($path);
     }
    
    
     private function _createDir($dir){   
         return is_dir($dir) or ($this->_createDir(dirname($dir)) and mkdir($dir, 0777));
     }
    
    
     private function _createLogFile($path){   
         $handle=fopen($path,"w"); //
         fclose($handle);
         return $this->_isExist($path);
     }
    
    
     private function _createPath($dir,$filename){
        if(empty($dir)){
        return $filename;
        }else{
        return $dir."/".$filename;
        }
     }
    
    
     function __destruct(){
     //关闭日志
     fclose($this->_filehandle);
     }
 }
?>