Is there a possibility to create a REST API in PHP that supports ETags?
And if yes, how could you use parse the response in PHP to consider the ETags?
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Is this the client or the server? – Gumbo Mar 03 '11 at 16:33
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I'm actually asking for both. How to do it server-side, and what the client has to do. – Sebastian Hoitz Mar 03 '11 at 18:16
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You can find the corresponding request headers in $_SERVER If-Match. Is the key HTTP_IF_MATCH, If-None-Match corresponds to HTTP_IF_NONE_MATCH.
In order to send proper ETags to the client use the ETag header like header( 'ETag: ' . generateEtag() );. You just need to ensure that your ETag represents the response of the service properly.
tobyS
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