Server Removes Last-Modified and ETag Headers?


I’m setting Last-Modified and ETag Headers, but it seems that the server is removing them? Why are they being removed? Is there any way to ensure the headers are actually sent?

header( "Cache-Control: max-age=10" );
header( "Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . " GMT" );
header( "ETag: " . time() );
echo "Hello World";

Demo page is here. This is a brand new site and account. I haven’t modified any settings yet.

Most probably related to PHP configuration, so we can do nothing about it

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