Programmatically: How to create caustom Magento logging

Step 1: Create a custom log file

In your Magento module's etc/config.xml file, add the following code:

	
    
     
    
       
             logger
             Mage_Core_Model_Log_Abstract
             
                 
             
                custom.log
                0520 
                
    
     
    
    
	

This code defines a custom logger called custom_logger that will write to a file named custom.log.

Step 2: Create a custom log logger

In your Magento module's Model directory, create a new PHP file (e.g. Logger.php) and add the following code:

	class YourModule_Model_Logger extends Zend_Log {

    protected $_logger;

    public function __construct($adapter = null) {
        parent::__construct($adapter);
        $this->_logger = Mage::getLog('custom_logger');
    }

    public function log($message, $level = Zend_Log::INFO) {
        $this->_logger->log($message, $level);
    }
    }
	

This code extends the Zend_Log class and sets up the custom logger.

Step 3: Use the custom logger in your code

In your Magento module's code, you can now use the custom logger to log messages. For example:

		$log = Mage::getModel('yourmodule/logger');
		$log->log('This is a custom log message', Zend_Log::INFO);
	

This will write the message "This is a custom log message" to the custom.log file with an info level.

Full code example

Here is the full code example:

app/code/local/YourModule/etc/config.xml

	
    
     
    
        
        logger
        Mage_Core_Model_Log_Abstract
        
        
        
           custom.log
           0520 
        
    
      
    
	
	

app/code/local/YourModule/Model/Logger.php

	class YourModule_Model_Logger extends Zend_Log {

    protected $_logger;

    public function __construct($adapter = null) {
        parent::__construct($adapter);
        $this->_logger = Mage::getLog('custom_logger');
    }

    public function log($message, $level = Zend_Log::INFO) {
        $this->_logger->log($message, $level);
    }
	}
	

app/code/local/YourModule/controllers/IndexController.php

	class YourModule_IndexController extends Mage_Core_Controller_Varien_Action {

    public function indexAction() {
        $log = Mage::getModel('yourmodule/logger');
        $log->log('This is a custom log message', Zend_Log::INFO);
        // ... rest of your code ...
    }
    }