Please help me to find a way to add new php library to Magneto2. In Magetno1 I add it to lib folder and then I could use it in my custom modules... But in Magento2 I am trying to do the same but no go... Anybody already try to do that or?

1 Answer 1


the easiest way would be to install it via composer.

depends on the library. It has to have a composer.json with autoloading settings defined.

if the library has a valid composer.json you can install it with the following command in your magento2 root:

composer require vendor/name:version

with vendor/name = the name that is defined in the composer.json

  • Here is the trick lib doesn't have valid composer.json... But I can make it no problem... I thought that I can just copy it to lib/internal folder an do some magic in main composer.json file to do mapping like for Magento/Framework or something like that ... Thanks for the answer I will try to do that. Commented Feb 7, 2016 at 23:20
  • magento itself does only autoload its own framework from the lib/internal directory: github.com/magento/magento2/blob/develop/composer.json#L219. So the library has to take care of the autoloading itself and then, with a valid composer.json autoloading, can easily be installed in the vendor dir Commented Feb 7, 2016 at 23:26
  • Hey man, just want to say thank you... Lot of issues were here for this lib... using it on php7 don't work... And you were right about composer, just I needed to add custom autoloader. Now it works perfectly. Commented Feb 8, 2016 at 19:10
  • @DavidVerholen I have use Third party Libs (DOMPDF) and setup it like lib/internal and call to my helper but getting error to Source class *** generation does not exist . Means Libs file's internal class is not create into generation so getting error. Please let me know proper solution. Commented Aug 25, 2017 at 4:25
  • 1
    For future readers.. In magento 2.2 adding library code to lib/internal doesn't work: github.com/magento/magento2/issues/10985
    – sergei.sss
    Commented Sep 28, 2017 at 17:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.