php中自定义日志处理类（类似于java中的log4j）

<?php

/**
* @(#)logger.php
* PHP version 5.2.3
*
*
* Copyright 2007 SoftRoad. All Rights Reserved.
*
*====================================================================
* 変更履歴
*
* 新規作成 2007 年5月17日 蒋彪
*/
class Logger {

var $g_log_level = 0;
var $g_log_file = "/tmp/php.log";

var $g_log_levels = array (
NONE => 0,
ERROR => 1,
INFO => 2,
DEBUG => 3
);

function __construct($logLevel, $logfile) {

$ext = explode(".", $logfile);
$this->g_log_file = $ext[0].".".date("Y-m-d")."." .$ext[1];
$this->g_log_level = strtoupper($logLevel);
}

function info($message) {

$level = INFO;
if ($this->g_log_levels[$this->g_log_level] >= $this->g_log_levels[$level]) {
//$message=date("D M j G:i:s T Y").$message;
$message = date("Y-m-d H:i:s") . " INFO [" . $_SERVER['REQUEST_URI'] . "] " . $message;
$this->write_log($message);
}
}
function error($message) {

$level = ERROR;
if ($this->g_log_levels[$this->g_log_level] >= $this->g_log_levels[$level]) {
$message = date("Y-m-d H:i:s") . " ERROR [" . $_SERVER['REQUEST_URI'] . "] " . $message;
$this->write_log($message);
}
}
function debug($message) {

$level = DEBUG;
if ($this->g_log_levels[$this->g_log_level] >= $this->g_log_levels[$level]) {
$message = date("Y-m-d H:i:s") . " DEBUG [" . $_SERVER['REQUEST_URI'] . "] " . $message;
$this->write_log($message);
}
}
function log_reset() {
@ unlink($this->g_log_file);
}

function write_log($message) {

if ((strcmp($this->g_log_file, "") == 0) || (strcmp($this->g_log_file, "logfile") == 0)) {
echo $message;
} else {
$fp = @fopen($this->g_log_file, "a+");
// if (flock($fp, LOCK_EX)) {
@fwrite($fp, "$message/n");
// @flock($fp, LOCK_UN);
// } else {
// echo "Couldn't lock the file !";
// }
@fclose($fp);
}
}
function __destruct() {
//print("bye bye");
}

}
?>