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How much code can I copy from an open source program?

I am creating a CMS for a client and I need inspiration from Drupal, Joomla! and wordpress. Now that Iā€™m thinking everything in my mind, I typed part of the code and it looks very similar to Joomla !. I do not want to steal the source code, but I want to be able to call it mine.

Does it use the same methods (the same ways to do things, but are written differently) well? Where is the line of plugins when it comes to programming?

edit: Let's just say, for the sake of this question, I want to sell this CMS and get money from it.

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2 answers

It depends on the license. Most open source programs, you can "steal" all the code while you copy the license (usually MIT or GPL).
This is the whole point of open source. Plagiarism refers to the opinion of the author. If the author says (in the license) that he can change his code, he can change his code. In addition, if you drop a line of credit about the original authors, then its beautiful

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This question is similar to what you are writing a newspaper. To research this document, you read a book and used the same ideas that you found in the book, but wrote an article using your own words. Is it plagiarism? Probably. If you write your own CMS and borrow a lot of code from Joomla, I would think about using Joomla and designing an extension to suit your specific needs. If you cannot do this, I would do one of two things:

  • Use the code and release your code under a licensed license.
  • Obtain explicit written permission from the Joomla developers to give you ownership of the dubious code.

When it comes to such issues, I think it's always better to be safe than sorry.

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Source: https://habr.com/ru/post/1394832/

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