I mean, PHP license clause 3 & 4 seems to say this already:
3. The name "PHP" must not be used to endorse or promote products
derived from this software without prior written permission. For
written permission, please contact group@php.net.
4. Products derived from this software may not be called "PHP", nor
may "PHP" appear in their name, without prior written permission
from group@php.net. You may indicate that your software works in
conjunction with PHP by saying "Foo for PHP" instead of calling
it "PHP Foo" or "phpfoo"
(I've edited my comment slightly, but not in a way that changes the context of your response.)
PHP License Clause 3 & 4 are about protecting PHP branding. Modified BSD Clause 3 is about using the software author's name or likeness as endorsement. For example, it limits putting antirez's face and name on our managed Redis product without obtaining his permission.
