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I have own WP plugin under GPL2 license as need for WP, but now I wanna add some 3rd party code for directory listing and this code is under MIT license. What I need to do, that make all right and use this code in my plugin?

  • This is a licensing question, not a WordPress question – Mat Apr 10 '18 at 9:03
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yes, you can include Expat (MIT) licensed libraries in your GPL plugin. WordPress plugin guidelines states,

Although any GPL-compatible license is acceptable, using the same license as WordPress — “GPLv2 or later” — is strongly recommended. All code, data, and images — anything stored in the plugin directory hosted on WordPress.org — must comply with the GPL or a GPL-Compatible license. Included third-party libraries, code, images, or otherwise, must be compatible.

Here is a list of licenses compatible with GPL.

  • One more question, in MIT license need write author name if you use his code. To where put this lines in WP plugin? On page in plugin where I am using his code or in readme? – user2481034 Apr 10 '18 at 10:03
  • if the library/code you are using is properly documented, its author should have some preamble in their code headers itself, hence you are not required to acknowledge/declare it. However, it is common and useful practice to add an acknowledgement in the readme.txt file. – Aurovrata Apr 10 '18 at 10:15

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