[JonathonW]

It might, if PHP were distributed under a copyleft license that cared about such things. PHP is not (it's licensed under a BSD-style license [1], which permits redistribution under another license with attribution).

I'm actually having trouble finding an interpreted language (and accompanying standard library) that is licensed under a copyleft license. Python isn't (the PSFL isn't copyleft); Ruby isn't (it's dual-licensed under 2-clause BSD and a Ruby license that's their own); Perl isn't (it's dual-licensed under GPL and the Artistic License, with an explicit note by Larry Wall that scripts are not considered derivative works for GPL purposes).

[1] http://www.php.net/license/3_01.txt

[spc476]

Would guile [1] fit the criteria of a GPL'ed interpreted language?

[1] http://www.gnu.org/software/guile/

[ploxiln]

guile is LGPL, "dynamic" linking is allowed http://git.savannah.gnu.org/gitweb/?p=guile.git;a=blob;f=LIC...

(damn it's hard to find a reference to the license on the web site)

EDIT: found a related link; some extra/common libraries are also LGPL http://www.gnu.org/software/guile/gnu-guile-projects.html#Co...