Error with Logging in zend

Hi  This is my code to generate logs 
$writer = new Zend_Log_Writer_Stream('http://localhost/clms/public/log');
$logger = new Zend_Log($writer);

$logger->info('Informational message');

but am getting an exception

Fatal error: Uncaught exception 'Zend_Log_Exception' with message '"http://localhost/clms/public/log" cannot be opened with mode "a"' in C:\xampp\htdocs\CLMS\library\Zend\Log\Writer\Stream.php:69 

Any body please tell me how to make the logs clearly. Thanks for helping me.

You need to provide the path to the log file, not a URL, so you probably want:

$writer = new Zend_Log_Writer_Stream(APPLICATION_PATH.'/../public/log');

the error you are getting is because the logger can't write to the path you provided (which makes sense since you gave it a URL). If you are still getting the error after changing this you just need to make sure the directory/log file is writable by the user the webserver runs as.