WordPress is authorized under GPLv2 (GNU General Public License) which makes it free and open-source programming. Each duplicate of WordPress has a permit duplicate with it.
Predecessor form of WordPress b2/cafelog was additionally authorized under the GPLv2.
GPL is exceptionally prominent in permitting open-source programming under it. It permits free establishment, alteration and dispersion of its source-code to other people. In spite of the fact that, it keeps up certain standards and guidelines under it.
Here free is alluded to opportunity and not cost. It might apply some insignificant charges on certain stages.
What is GPL
GNU programming was composed by Richard Stallman.
The GNU General Public License is called GPL in short. It has a few terms and conditions to duplicate, alter and convey the product authorized under its name.
GNU ensures that any product source-code authorized under it needs to make beginning source code open and unreservedly accessible to every one of its clients. Here, unreservedly doesn't mean by expense yet it implies that it is openly accessible to clients to disseminate and adjust the code, however they can't force any confinements on further appropriation, source code must be made available.
Software permitting these offices goes under the classification of Free Software. What's more, on the off chance that those rights should be held, at that point these are called Copylefted. The GPL requests both.
On 29th June 2007, the third form GNU GPLv3 (variant 3) was discharged. It was found to manage a few issues that were available in the second version.
Updating GNU form is optional.