HTTP_PRAGMA：无缓存，HTTP_CACHE_CONTROL：无缓存

Question

Hi We have two server on which running Apache 2.4.10 on windows when we compare phpinfo() on two servers one server is showing following extra properties. Even though both have same apache and php configurations.

<tr><td class="e">HTTP_PRAGMA </td><td class="v">no-cache </td></tr>
<tr><td class="e">HTTP_CACHE_CONTROL </td><td class="v">no-cache </td></tr>

 phpinfo(); 

We are facing one functional issue and we suspect that this issue is due to this. But no luck to find the root cause though. The functionality is to generate pdf using third party php utility. The pdf is generated however images in pdf are messed up. one image is replacing all three images.(If there are 3 different images image 1 is displayed at all three locations.)

Please advise. Thanks