php工具类之【自定义日志记录类】

lang110

<?php
if(!defined("DIR_ROOT")){
define("DIR_ROOT", dirname(dirname(__FILE__)));
}
define('LEVEL_FATAL', 0);
define('LEVEL_ERROR', 1);
define('LEVEL_WARN', 2);
define('LEVEL_INFO', 3);
define('LEVEL_DEBUG', 4);
/**
* 记录操作过程中的日志信息
* @version 1.0 20140725
*/
class Logger {
static $LOG_LEVEL_NAMES = array(
'FATAL', 'ERROR', 'WARN', 'INFO', 'DEBUG'
);
private $level = LEVEL_DEBUG;
private $rootDir = DIR_ROOT;
static function getInstance() {
return new Logger;
}
/**
* 设置最小的log记录级别，小于该级别的log日志输出将被忽略掉
* @param int $lvl -- 最小的log日志输出级别
* @throws Exception
*/
function setLogLevel($lvl) {
if($lvl >= count(Logger::$LOG_LEVEL_NAMES)  || $lvl < 0) {
throw new Exception('invalid log level:' . $lvl);
}
$this->level = $lvl;
}
//###################输出各个级别的日志信息---start==============
function debug($message, $name = 'root') {
$this->_log(LEVEL_DEBUG, $message, $name);
}
function info($message, $name = 'root') {
$this->_log(LEVEL_INFO, $message, $name);
}
function warn($message, $name = 'root') {
$this->_log(LEVEL_WARN, $message, $name);
}
function error($message, $name = 'root') {
$this->_log(LEVEL_ERROR, $message, $name);
}
function fatal($message, $name = 'root') {
$this->_log(LEVEL_FATAL, $message, $name);
}
//###################输出各个级别的日志信息---end==============
/**
* 记录log日志信息
* @param unknown_type $level
* @param unknown_type $message
* @param unknown_type $name
*/
private function _log($level, $message, $name) {
if($level > $this->level) {
return;
}
$log_file_path = $this->rootDir."/logs/".$name.'.log';
$log_level_name = Logger::$LOG_LEVEL_NAMES[$this->level];
$content = date('Y-m-d H:i:s') . ' [' . $log_level_name . '] ' . $message . "\n";
file_put_contents($log_file_path, $content, FILE_APPEND);
}
}
//
//$logger = Logger::getInstance();
//$logger->debug('this is my first log', 'test');