How to hide the Session_start notice print

A notice is printed saying "Session already started" because I'm doing a session_start() even though I have sessions autostart=1 in the php.ini file.

I would still like to see other kind of notices, but how could I hide this particular one?
ecchymoseAsked:
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ashooooCommented:
Try @session_start()

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ecchymoseAuthor Commented:
Nice!  it works!

but what does the @ is doing exactly?
ashooooCommented:
It hides the warning. Its not a good practice, but you can use it if you are sure it wont mess up the rest of your page. :)

Thanks for the points
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