PHP日志LOG类定义与用法示例

本文实例讲述了PHP日志LOG类定义与用法。分享给大家供大家参考，具体如下：<?php/***PH

本文实例讲述了PHP日志LOG类定义与用法。分享给大家供大家参考，具体如下：

<?php
/**
* PHP log 类 
*/
class Config{
 public static function getConfig (){
 return array(
 'LOG_FILE'=>'test.txt', 
 '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(){
 $cfg = Config::getConfig(); 
 $this->logLevel = isset($cfg['LOG_LEVEL']) ? $cfg['LOG_LEVEL']:LOG::INFO;
 if(!isset($cfg['LOG_FILE']) && strlen($cfg['LOG_FILE'])){
 throw new Exception('can\'t set file to empty');
 }
 $this->LogFile = @fopen($cfg['LOG_FILE'],'a+');
 if(!is_resource($this->LogFile)){
 throw new Exception('invalid file Stream');
 }
 }
 public static function getInstance(){
 static $obj;
 if(!isset($obj)){
 $obj = new Log();
 }
 return $obj;
 }
 public function LogMessage($msg, $logLevel = Log::INFO,$module = null){
 if($logLevel > $this->logLevel){
 return ;
 }
 date_default_timezone_set('Asia/shanghai');
 $time = strftime('%x %X',time());
 $msg = str_replace("\t",'',$msg);
 $msg = str_replace("\n",'',$msg);
 $strLogLevel = $this->levelToString($logLevel);
 if(isset($module)){
 $module = str_replace(array("\n","\t"),array("",""),$module);
 }
 $logLine = "$time\t$msg\t$strLogLevel\t$module\r\n";
 fwrite($this->LogFile,$logLine);
 }
 public function levelToString($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;
 }
}
$logIns = LOG::getInstance();
//print_r($logIns);
$logIns->logMessage("test",LOG::INFO,'myTest');
?>

运行程序，在当前目录下生成test.txt文件内容如下（这里是运行3次的结果）：

09/06/18  14:56:20 test LOG::INFO myTest 09/06/18  14:56:21 test LOG::INFO myTest 09/06/18  14:56:22 test LOG::INFO myTest

PHP 日志 LOG类