> 1.)
> I see from www.php.net , people said they will generate a Session ID by
> themselves
> srand((double)microtime()*1000000);
> $unique_str = md5(rand(0,9999999));
> why not to generate by ourself ?
> PHP will create itself .

Once upon a time, a long time ago, there was no built-in PHP session
support.

Thus, one had to generate session IDs for oneself.

When I was a newbie, we *walked* to school.  In the snow.  Uphill.  Both
ways. :-)

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