tree deef0a6a7366be4cb61613f5bac4cfceb88f265a
parent 88102eae8f86045307e9d46ad900f91158227f2b
author Bo Yang <teboring@google.com> 1513129624 -0800
committer Bo Yang <teboring@google.com> 1513129624 -0800

Call php method via function name instead of calling directly.

This changes the linking error if php extension is not statically linked
to a runtime error. In this way, users who don't need Timestamp can
still use protobuf even if date extension is not statically linked in
php.