在discuz!的\data\log\目录下，我们会看到很多格式如YYYYMM_XX.php的文件(如下图所示)，打开文件我们就会看到很多操作日志，这些日志怎么生成的呢，今天我们就来看看Discuz!运行日志记录runlog函数

function runlog($file, $message, $halt=0) {  

    helper_log::runlog($file, $message, $halt);  

}  

相关方法如下

public static function runlog($file, $message, $halt=0) {  

    global $_G;  

    $nowurl = $_SERVER['REQUEST_URI']?$_SERVER['REQUEST_URI']:($_SERVER['PHP_SELF']?$_SERVER['PHP_SELF']:$_SERVER['SCRIPT_NAME']);  

    $log = dgmdate($_G['timestamp'], 'Y-m-d H:i:s')."\t".$_G['clientip']."\t$_G[uid]\t{$nowurl}\t".str_replace(array("\r", "\n"), array(' ', ' '), trim($message))."\n";  

    helper_log::writelog($file, $log);//写入文件  

    if($halt) {  

        exit();  

    }  

}  

  

public static function writelog($file, $log) {  

    global $_G;  

    $yearmonth = dgmdate(TIMESTAMP, 'Ym', $_G['setting']['timeoffset']);  

    $logdir = DISCUZ_ROOT.'./data/log/';  

    $logfile = $logdir.$yearmonth.'_'.$file.'.php';//日志文件  

    if(@filesize($logfile) > 2048000) {  

        $dir = opendir($logdir);  

        $length = strlen($file);  

        $maxid = $id = 0;  

        while($entry = readdir($dir)) {  

            if(strpos($entry, $yearmonth.'_'.$file) !== false) {  

                $id = intval(substr($entry, $length + 8, -4));  

                $id > $maxid && $maxid = $id;  

            }  

        }  

        closedir($dir);  

  

  

        $logfilebak = $logdir.$yearmonth.'_'.$file.'_'.($maxid + 1).'.php';  

        @rename($logfile, $logfilebak);  

    }  

    if($fp = @fopen($logfile, 'a')) {  

        @flock($fp, 2);  

        if(!is_array($log)) {  

            $log = array($log);  

        }  

        foreach($log as $tmp) {  

            fwrite($fp, "<?PHP exit;?>\t".str_replace(array('<?', '?>'), '', $tmp)."\n");  

        }  

        fclose($fp);  

    }  

}  

我看可以看到运行日志按月存储在各个分类（日志的分类大致有'illegal', 'rate', 'credit', 'mods', 'medal', 'ban', 'cp', 'magic', 'error', 'invite', 'payment', 'warn', 'crime', 'sendmail'几种）的文件下，每条记录的不同字段以制表符\t分隔；