Ways to tell if existing setup is SAPI or Shared Object?

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What ways are there to tell if PHP is actually built into an Apache 2
installation or if it's installed as a shared object?

I've dropped a file containing phpinfo() on the server I'm looking at,
hoping the Server API value would give me a clue, but it just says
"Apache 2.0 Filter," and I don't know if Apache filters are required
to be one or the other....

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