PHP SESSIONS Question -

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When a user logs in then I should report it there $ _ session ['user_id'] user id or not? For example, just like the code below. 

  mysqli_real_escape_string ($ mysqli, htmlentities (strip_tags ($ _ session ['user_id']))); Session data is stored server-side, so it must be approved before being added to it.  $ _ session  in the first place.

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