<?php
date_default_timezone_set('Europe/Rome');
define('DEFAULT_LOGFILE','logfile.txt');
class Logger
{
private $base_path;
private $basename;
private $filename;
private $threshold = 1024;
private $size = TRUE;
private $first_run = TRUE;
private $rotateET = FALSE;
private $no_rotation = FALSE;
function __construct()
{
$this->base_path = dirname(__FILE__);
$this->basename = DEFAULT_LOGFILE;
$this->threshold = 1024;
}
/**
* runned the first time
*/
private function firstRun()
{
$this->filename = $this->base_path . DIRECTORY_SEPARATOR . $this->basename;
$this->rotate_log();
$this->flog = fopen($this->filename,'a+');
$this->first_run = false;
}
/**
* set the filename
*/
function setFilename($filename)
{
$this->basename = $filename;
}
/**
* set base path (base dir)
*/
function setBasepath($basepath)
{
$this->base_path = $basepath;
}
/**
* set threshold for rotation, in term of number of KBytes
* defaults to 1024 (1 MByte)
*/
function setThreshold($threshold) {
$this->threshold = $threshold;
}
/**
* set ratate every time: every time log function is called rotate is called
*/
function setRotateEveryTime($rotateET)
{
$this->rotateET = $rotateET;
}
/**
* use this to disable log file name rotation ( $logger->setNoRotation(TRUE) means no rotation of file log)
*/
function setNoRotation($rotation)
{
$this->no_rotation = ($rotation?FALSE:TRUE);
}
/**
* rotate log $filename adding .x to end of filename
* use this to force rotate
*/
public function rotate_log()
{
if($this->no_rotation) return;
$threshold_bytes = $this->threshold* 1024;
$filename = $this->filename;
if( file_exists($this->filename) && filesize($filename) >= $threshold_bytes ) {
// rotate
$path_info = pathinfo($filename);
$base_directory = $path_info['dirname'];
$base_name = $path_info['basename'];
$num_map = array();
foreach( new DirectoryIterator($base_directory) as $fInfo) {
if($fInfo->isDot() || ! $fInfo->isFile()) continue;
if (preg_match('/^'.$base_name.'\.?([0-9]*)$/',$fInfo->getFilename(), $matches) ) {
$num = $matches[1];
$file2move = $fInfo->getFilename();
if ($num == '') $num = -1;
$num_map[$num] = $file2move;
}
}
krsort($num_map);
foreach($num_map as $num => $file2move) {
$targetN = $num+1;
rename($base_directory.DIRECTORY_SEPARATOR.$file2move,$filename.'.'.$targetN);
}
}
}
/**
* write log line.
* that is:
* [date] PID: [[PID]] $text\n
* where
* [date] is date('Ymd H:i:s')
* [PID] is getmypid() (i.e. [[PID]] would be [3123] string)
*/
function log($text)
{
if($this->first_run) $this->firstRun();
fwrite($this->flog,date('Ymd H:i:s')." PID: [".getmypid()."] ".$text."\n");
}
/**
* destructor ensure file close, use
* unset $logger;
* that is.
*/
function __destruct()
{
fclose($this->flog);
}
}
//$testing = true;
if(isset($testing)) {
$logger = new Logger();
$logger->log('a strange message');
}
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