<?php 
/**
* MyLog -> This class is subclass of pear::log
*/
 
require_once 'Log.php' ; // pear Log class
 
class MyLog
{
 
var $logger = Null ; // Log class singleton instance
 
function MyLog() // constructor
{
global $myGlobal ;
$conf = array('mode' => 0600, 'timeFormat' => '%X %x');

$this->logger = &Log::singleton('file', $myGlobal['log']['logfile'], '', $conf, $myGlobal['log']['level']);
 
} // end of function MyLog
 
/**
* @desc logs to the specified file
* @param
* below are the valid levels , always use nos for specifying log levels
 
0 System is unusable
1 Immediate action required
2 Critical conditions
3 Error conditions
4 Warning conditions
5 Normal but significant
6 Informational
7 Debug-level messages
 
*/
 
function writelog($logmsg, $priority=7, $file_name = "" , $line_no = "")
{
global $myGlobal ;
 
// Check the current file size
 
// we have two log files -> trace.last.log ang trace.log
// both of these should not be greater than specified size limit
// suppose specified size limit is 100 MB
// in this case if trace.log (current log file) increases more than 50 MB
// trace.last.log is deleted , trace.log is renamed to trace.log.last and
// a new trace.log is created for logging
 
$lsize = filesize ( $myGlobal['log']['logfile'] ) ; // in bytes
$fsize = $lsize/2 ;
echo $myGlobal['log']['logfile'];
if ($lsize >= $myGlobal['log']['size'] *1024*1024/2){ // exceeded the limit
// delete if there's already some old file like .last
unlink($myGlobal['log']['logfile']."last") ;
// rename the current log file to filenaame.last.log
rename($myGlobal['log']['logfile'], $myGlobal['log']['logfile'].".last") ;
 
}
 
// prepend the log message with unix timestamp
$logmsg = mktime()." ".$logmsg ;
 
// append file name and line no
$logmsg .= " ".$file_name ;
$logmsg .= " ".$line_no ;
 
//append user login
$logmsg .= " ".$_SESSION[current_login_id] ;
 
$this->logger->log($logmsg, $priority) ;
 
// mail logs if required
if ($priority <= $myGlobal['log']['email_level'] ){
 
// send email
$this->sendemail($logmsg, $priority) ;
 
}
 
 
 
 
}
 
function sendemail($logmsg, $priority) // implementation for sending notification through mail
{
// implement yourself
}
 
/**
* Destructor
*/
function _MyLog()
{
if ($this->_opened) {
$this->close();
}
}
}
// Read more at http://www.devshed.com/c/a/PHP/Logging-in-PHP-Applications/2/#SQLHdTTPDehxVHjm.99
?>