Redistributions of source code must retain the above copyright...
Redistributions in binary form must reproduce the above copyright..
Fedora Packaging Guidelines requires (to respect the License term) that each RPM includes the LICENSE file, when provided by upstream, and to request for it when missing.
From PHP License:
Fedora Packaging Guidelines requires (to respect the License term) that each RPM includes the LICENSE file, when provided by upstream, and to request for it when missing.
So I do.
http://fedoraproject.org/wiki/Packaging/LicensingGuidelines#License_Text