apache - ETag header not being sent from PHP -

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i'm running php 5.3.2 , apache 2.2.14. using header(), if send "etagx" header in response, if send "etag", correct header name, nothing.

header('etagx: "33653a-4831d8249af80"')

works, while

header('etag: "33653a-4831d8249af80"')

does not. there configuration option in php.ini, or in of apache configuration files might affect this?

just tested on php 5.3 , apache 2.4 , worked me.

make sure apache don't unset etag this:

<ifmodule mod_headers.c>   header unset etag </ifmodule>  fileetag none

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