How to log the calling class infos? - php

Question

I would like to override the CI_Log class to improve the log lines.
I want to log the name of the calling class, and the method.
Example :
DEBUG - 2011-04-23 09:21:29 - MY_Class - method --> Router Class Initialized
I tried to override the write_log mehod like this :
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class MY_Log extends CI_Log {
public function write_log($level = 'error', $msg, $php_error = FALSE)
{
[...]
$message .=
$level .
(($level == 'INFO') ? ' - ' : ' - ') .
$this->router->fetch_class() .
' - ' .
$this->router->fetch_method() .
' - ' .
date($this->_date_fmt). ' --> ' .
$msg .
"\n";
[...]
}
}
But it doesn't work, the $this->router is not accessible.
Could you help me?

Answer 1

You can use somewhere in your method:
//$RTR is available from system/core/CodeIgniter.php
global $RTR;
$router_class = $RTR->fetch_class();
$rotuer_method = $RTR->fetch_method();

Answer 2

Ok, I think I got it. Here is my code :
[...]
$message .= $level.(($level == 'INFO') ? ' - ' : ' - ') . date($this->_date_fmt);
$stack = debug_backtrace();
// We are searching for the 2nd element of the $stack array beacause :
// - $stack[0] is always taken by JG_Log->write_log()
// - $stack[1] is always taken by log_message()
if (isset($stack[2]['class'])) {
$message .= ' - ' . $stack[2]['class'] . ' - ' . $stack[2]['function'];
}
$message .= ' --> '.$msg."\n";
[...]
I hope that can help others ! :-)