[PHP] How PHP handles multiple inclusions of the same file?

[Gambler ZG]

Let’s say I have function named "render", which looks like this:
<?php
function render($template, $vars){
    extract($vars);
    include("templates/".$template.'.php');
}
?>
I also have template "some_tmplt.php", which I need to render 100 times. 
Will PHP read, parse and compile this file 100 times, or will it 
"remember" file's content?

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