session_start in PHP class file

Do I  need session_start in the beginning of a class file in PHP to use $_SESSION ?
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Greg AlexanderLead DeveloperCommented:
You need it at the top of the page that the class is on
RozamundaAuthor Commented:
so that means if i have a program:

  require_once myclass.php

i need to have also session_start
in myclass.php, if i refer there to a session ?. Yes ?
Greg AlexanderLead DeveloperCommented:
no, sessions are global, you will have access to the session even within the class

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Neil_BradleyWeb UX/UI DeveloperCommented:
//initialize the session
if (!isset($_SESSION)) {
Loganathan NatarajanLAMP DeveloperCommented:
You need not start the session on every page, it can be included once in any include file .. so that it would be referred all the pages.. (included)
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