PHPTAL is licensed under LGPL (v2.1 or later).
The licence does not "infect" other software you use with PHPTAL, so it's safe for commercial (closed, for-profit) use in PHP applications.
with applications, even if they're not free/open-source.
You only have obligations if you redistribute PHPTAL (give PHPTAL's source code to others). Sending of PHPTAL-generated HTML from a server doesn't count as redistribution.
If you modify and redistribute PHPTAL
, then your modifications of PHPTAL
's code (and only PHPTAL
's code) become LGPL
However, if you always keep PHPTAL
only on your server, then you're allowed to keep your modifications secret.
If you redistribute your application to others with PHPTAL
built-in, it must be possible to modify PHPTAL
part of the application. If you use copy protection (encryption/obfuscation of PHP
files), don't apply it to PHPTAL
Don't remove license (
file) from PHPTAL
copies you give to others.
IANAL. This page is only non-legally-binding summary.