Question

To clarify:

I’m building a Logger class that allows me to easily log messages:

lib.Logger.php:

<?php
class Logger {
    private $handle;

    public function __construct($log_name, $log_path) {

        if ( ! is_dir($log_path))
            throw new Exception('Log path does not exist.');

        if ( ! in_array(strtolower(substr($log_name, 0, -4)), array('.log', '.txt')))
            $log_name = "{$log_name}.log";

        $this->handle = fopen("{$log_path}/{$log_name}", 'a');

        $this->log('------------- Initializing ------------- '.get_parent_class($this));
    }

    // --------------------------------------------------------------------

    public function __destruct() {
        fclose($this->handle);
    }

    // --------------------------------------------------------------------

    public function log($message) {
        $time = date(DATE_RFC822);

        $log = "[{$time}] {$message}\n";

        fwrite($this->handle, $log);
    }    

}

?>

And I call this using:

MyController.php:

<?php
class MyController extends Controller {
    $logger = new Logger('testlog','/path/to/logs/');
    $logger->log('Logs are fun!');
}
?>

When I initialize the object:

 $this->log('------------- Initializing ------------- '.get_parent_class($this));

I want to log the name of the object (or file) that is calling log() — in this case, either

MyController

or

/path/to/MyController.php

.

I tried using get_parent_class(), but of course this doesn’t work because Logger does not have a parent class per se.

Any ideas? thank you so much for the help!

Alex B

Answer 1

The only way to handle this implicitly is to capture the output from debug_backtrace as the others have suggested.

If you are interested in an explicit approach, maybe this could be it

in Logger

public function initialize( $context )
{
  $logMessage = '------------- Initializing ------------- ';
  if ( is_object( $context ) )
  {
    $logMessage .= get_class( $context );
  } else {
    // do something else?
  }
  $this->log( $logMessage );
}

and then

class MyController extends Controller
{
  public function someFunc()
  {
    $logger = new Logger('testlog','/path/to/logs/');
    $logger->initialize( $this );
    $logger->log('Logs are fun!');
  }
}