Where are Magento's log files located?
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I am new to Magento. I can't find log files in Magento. I googled it, but the Magento Commerce site returns closed and some other sites explain how to create custom log files. I want to know the location of built-in log files.
Php Solutions
Solution 1 - Php
You can find them in /var/log within your root Magento installation
There will usually be two files by default, exception.log and system.log.
If the directories or files don't exist, create them and give them the correct permissions, then enable logging within Magento by going to System > Configuration > Developer > Log Settings > Enabled = Yes
Solution 2 - Php
To create your custom log file, try this code
Mage::log('your debug message', null, 'yourlog_filename.log');
Refer this Answer
Solution 3 - Php
You can find the log within you Magento root directory under
var/log
there are two types of log files system.log and exception.log
you need to give the correct permission to var folder, then enable logging from your Magento admin by going to
System > Configuration> Developer > Log Settings > Enable = Yes
system.log is used for general debugging and catches almost all log entries from Magento, including warning, debug and errors messages from both native and custom modules.
exception.log is reserved for exceptions only, for example when you are using try-catch statement.
To output to either the default system.log or the exception.log see the following code examples:
Mage::log('My log entry');
Mage::log('My log message: '.$myVariable);
Mage::log($myArray);
Mage::log($myObject);
Mage::logException($e);
You can create your own log file for more debugging
Mage::log('My log entry', null, 'mylogfile.log');
Solution 4 - Php
These code lines can help you quickly enable log setting in your magento site.
INSERT INTO `core_config_data` (`config_id`, `scope`, `scope_id`, `path`, `value`) VALUES
('', 'default', 0, 'dev/log/active', '1'),
('', 'default', 0, 'dev/log/file', 'system.log'),
('', 'default', 0, 'dev/log/exception_file', 'exception.log');
Then you can see them inside the folder: /var/log under root installation.