Create custom log file magento 2.4.3

Question

for 2.4.2 below code working

$writer = new \Zend\Log\Writer\Stream(BP . '/var/log/custom.log');
$logger = new \Zend\Log\Logger();
$logger->addWriter($writer);
$logger->info('Custom message') 
$logger->info(print_r($object->getData(), true));

for 2.4.2 above code working

$writer = new \Laminas\Log\Writer\Stream(BP . '/var/log/custom.log');
$logger = new \Laminas\Log\Logger();
$logger->addWriter($writer);
$logger->info('text message');

Above solution not working in Magento 2.4.3 version anybody have an idea for the same

For 2.4.3?

• Mayur Sisodiya: You need to do something like this to achieve this. devdocs.magento.com/guides/v2.4/config-guide/log/…
• Amrit Pal Singh: techurbane.com/how-to-add-custom-logs-in-magento-2

Answer 1

the custom log file created using the below code

for Magento 2.4.2 before version use this

$writer = new \Zend\Log\Writer\Stream(BP . '/var/log/custom.log');
$logger = new \Zend\Log\Logger();
$logger->addWriter($writer);
$logger->info('Custom message') 
$logger->info(print_r($object->getData(), true));

for Magento 2.4.2 or after version use this

$writer = new \Laminas\Log\Writer\Stream(BP . '/var/log/custom.log');
$logger = new \Laminas\Log\Logger();
$logger->addWriter($writer);
$logger->info('text message');

for Magento 2.4.3 version use this

$writer = new \Zend_Log_Writer_Stream(BP . '/var/log/custom.log');
$logger = new \Zend_Log();
$logger->addWriter($writer);
$logger->info('text message');

• Kalvin Klien: Hold on, why is 2.4.3 still using Zend?

Answer 2

$writer = new \Zend_Log_Writer_Stream(BP . '/var/log/custom.log');
$logger = new \Zend_Log();
$logger->addWriter($writer);
$logger->info('text message');

Answer 3

Here the correct way to create log file

magento/app/code/vendorname/modulename/etc/di.xml

<!-- start logger-->
 <virtualType name="Vendor\ModuleName\Log\Handler" type="Magento\Framework\Logger\Handler\Base">
 <arguments>
 <argument name="fileName" xsi:type="string">/var/log/custom_logger_name.log</argument>
 </arguments>
 </virtualType>
 <virtualType name="Vendor\ModuleName\Log\Logger" type="Monolog\Logger">
 <arguments>
 <argument name="name" xsi:type="string">Vendor::ModuleName</argument>
 <argument name="handlers" xsi:type="array">
 <item name="system" xsi:type="object">Vendor\ModuleName\Log\Handler</item>
 </argument>
 </arguments>
 </virtualType>
 <type name="Vendor\ModuleName\Model\ClassWhereNeedToInjectCustomLogger">
 <arguments>
 <argument name="logger" xsi:type="object">Vendor\ModuleName\Log\Logger</argument>
 </arguments>
 </type>
<!-- end logger-->

On the constructor of this class Magento\app\code\Vendor\ModuleName\Model\ClassWhereNeedToInjectCustomLogger inject Psr\LoggerInteface on the constructor and use the methods, it will write on your new file log.

Cheers

Answer 4

Execute below command to include log library into the vendor/laminas if not there.

This has been removed from 2.4.3.

For Magento 2.4.3 version, execute this - composer require laminas/laminas-log -vvv

• Sagar Dobariya: Thank you @sandip, but Magento has removed this module in version 2.4.3 so something reason behind it. so we need to find out another solution instead of adding again laminas log.