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library using $_SESSION

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  library using $_SESSION Jivanmukta <jivanmukta@poczta.onet.pl> - 2011-06-24 08:45 -0700
    Re: library using $_SESSION Jerry Stuckle <jstucklex@attglobal.net> - 2011-06-24 16:06 -0400

#2335 — library using $_SESSION

I created library of PHP5 functions that use $_SESSION. Which solution
is better:
1. Add session_start() at the top of library file
2. Add a comment that library users shoud call session_start().
Please help. I have little experience in PHP5.

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#2336

On 6/24/2011 11:45 AM, Jivanmukta wrote:
> I created library of PHP5 functions that use $_SESSION. Which solution
> is better:
> 1. Add session_start() at the top of library file
> 2. Add a comment that library users shoud call session_start().
> Please help. I have little experience in PHP5.

I would say that you should require the user to issue the 
session_start() call.  A couple of reasons:

1. Your library may not be included at the start of the page, and 
session_start() will fail if ANY output is produced before the call.

2. The user may issue his/her own session_start() call, in which case 
the second call (whichever it may be) will fail.

Libraries shouldn't do anything other than what they are told to do with 
no side effects; in this case your library hasn't been told to issue the 
session_start() call.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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