Hi
> -----Original Message-----
> From: Barry [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, March 27, 2001 10:23 PM
> To: [EMAIL PROTECTED]
> Subject: [PHP-WIN] Array How To ???
>
>
> Hello Everyone,
>
> I would like to sort a list of array indices. The array is
> multi- dimensional N x 3
>
> for example, if (note the actual data is not important to my
> question):
>
> $a[0]['a'] = 1, $a[0]['b'] = 2, $a[0]['c'] = 3
> $a[1]['a'] = 1, $a[1]['b'] = 2, $a[1]['c'] = 3
> $a[2]['a'] = 1, $a[2]['b'] = 2, $a[2]['c'] = 3
>
> Q1) I will use the "usort" user sort function. I see the
> example for multi-dimensional arrays in the manual (they use
> fruits, not a b c). Does usort work in Windows (NT4 machine,
> PHP 4.04, running as cgi) ?
yes, used it some time ago ;)
>
> Q2) The array $a will be stored in a session. I will want to
> clear $a and then recreate and resort $a. How do I clear a
> variable or array ?
easiest way:
unset($a);
or for a specific item
unset($a[1]);
> For example, if the first time I create $a it gets up to
> $a[30] (remember $a is saved in a session), but if I recreate
> $a and the indices only go to $a[20], I need to be sure
> $a[21] to $a[30] no longer exist. Easiest way: clear $a
> before recreating it.
>
> Q3) The $a array will be generated from the results of a
> mysql database query. Is it realistic to save the results set
> ($res) of a query ($res =
> mysql_query($sql)) in a session? I think the size of $res
> won't exceed 32KB. Is there a session storage size limit for Windows?
hmm .. i don't know, but do not store the $res ... read the query line
by line into an array:
// Read the whole query and put it into a 2D Array
@unset($storearray);
while($row=mysql_fetch_array($res,MYSQL_ASSOC))
{
$storearray[]=$row;
}
then put the storearray into your session ;)
> Thanks very much for your experience,
> Barry.
hope this helps ;)
CodeDuck
>
>
>
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