What are the potential legal implications of using GPL licenses for PHP software and how does it impact commercial usage?

The potential legal implications of using GPL licenses for PHP software include the requirement to distribute the source code of any modifications made to the software and the restriction on combining the GPL-licensed software with proprietary software. This can impact commercial usage as it may limit the ability to sell or distribute the software without also providing access to the source code.

// To avoid potential legal implications, consider using a more permissive license such as the MIT License for PHP software.