I am including a remote file after making
allow_url_include = On
The file is included using include_once in file.php
include_once ("http://abcd.com/func.php");
I am using simple LAMP stack.
My question is that for every request which comes to the server and uses file.php, func.php will be pulled from abcd.com. Within a request if file.php is included many times in other files will func.php be pulled every time?
The _once means you will load the file once per request. But will load it again on a new request. If you want to cache some response of this file make a return in that included file and save the result anywhere you like. For example in a textfile (i.e. as JSON-string). On the next request you check if that file exists.
However saving in a textfile may not be the most perfomant way to do this, but probably faster than requesting this file every time. Have a look at Memcache
Include into a var: $data = include_once('...'); (include has to have a return)
$data = cached_include('..') (the function you write to get cached data)