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/*** 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());    $msg = str_replace("	","",$msg);    $msg = str_replace("","",$msg);    $strLogLevel = $this->levelToString($logLevel);    if(isset($module)){      $module = str_replace(array("","	"),array("",""),$module);    }    $logLine = "$time	$msg	$strLogLevel	$module";    fwrite($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 myTest09/06/18  14:56:21 test LOG::INFO myTest09/06/18  14:56:22 test LOG::INFO myTest

更多关于PHP相关内容感兴趣的读者可查看本站专题：《PHP日志操作技巧总结》、《php文件操作总结》、《PHP数组(Array)操作技巧大全》、《PHP基本语法入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。