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StevePINA · 08-23-2016, 02:13 PM

I think I found a solution for the problem. In my header view I changed the HTML meta tag to a call to the PHP function header(). It now looks this way.

Code:
<head>

    <?php header("Cache-Control: public, max-age=60, s-maxage=60");?> 

    ...

</head>

The response header now seems to get the correct values: "Cache-Control public, max-age=60, s-maxage=60".

I think there might be some change in the CI framework code from CI 2 to CI 3. In CI 2 there was no Cache-Control entry in the response header whether the default option of CI 3 seems to be "no-store, no-cache, must-revalidate".