RE: [PHP] Newbie Question: Variables on the fly

[Tim Winters]

Steve!!!
This is great!
I had no idea you could use arrays in url variables.  That makes everything 
much easier.

Thanks very much
Tim
At 06:26 AM 28/05/2004, Steve Edberg wrote:
At 2:01 AM -0300 5/28/04, [EMAIL PROTECTED] wrote:
Thanks for the reply Denis,
Let me elaborate a bit.
I have a php page which I want to pass a series of variables via a url 
string.

eg
myPage.php?dataPoint1=10&dataPoint2=20&dataPoint3=30
The thing is I won;t know until runtime how many dataPoints there will be 
so I have also included 1 additional url variable

eg
myPage.php?totalDataPoints=3&dataPoint1=10&dataPoint2=20&dataPoint3=30
From there I want to take those data points and do several things
with each of them.  The keep things simple lets say I want to multiply 
each by 3 and then divide it by 2 and put it into a new variable (under 
the same naming system).

eg
$xtemp=$HTTP_GET_VARS[totalDataPoints];
do {
        A line here which will take each dataPoint and multiply by 3 and 
divide by 2 and assign it to a new variable with the same numbering 
system (eg $myNewVar1=$HTTP_GET_VARS[dataPoint1]*3/2;
        $xtemp--;
} while ($xtemp>0);

Make any more sense?
Thanks.

Strictly speaking, your original question referred to what PHP calls 
'variable variables':

        http://us3.php.net/manual/en/language.variables.variable.php
However, most of what you can do with them can be done more simply with 
arrays. In your example above, use

        myPage.php?dataPoint[]=10&dataPoint[]=20&dataPoint[]=30
and you get an array
        $dataPoint[0]=10
        $dataPoint[1]=20
        $dataPoint[2]=30
The number of data points is count($dataPoint). See
        http://us3.php.net/manual/en/language.variables.external.php
for more info on this technique.
        steve edberg


At 01:24 AM 28/05/2004, Dennis Seavers <[EMAIL PROTECTED]> wrote:
Maybe others will catch on to your intention, but I think you need to
provide a bit more information.  For example, what variables do you want to
create (drawn from a file source, or create on the fly)?  Where will they
come from (a database, perhaps)?  You could create a script that creates
variables from scratch, following a (hopefully) finite mathematical
formula.  Or you could manipulate data that already exists, turning this
data into some kind of variables.
Ultimately, you'll have to give a better of sense of the end result you'd
like.
Dennis Seavers

 [Original Message]
 From: <[EMAIL PROTECTED]>
 To: PHP List <[EMAIL PROTECTED]>
 Date: 05/27/2004 9:17:11 PM
 > Subject: [PHP] Newbie Question: Variables on the fly
 Hello,
 I'm sure this is a newbie question but I don't know the syntax.
 I want to create a series of variables within a php script at runtime
with
 a for loop.
 eg
 myVar1
 myVar2
 myVar3
 etc....
 What is the proper syntax to do this?
 Thanks,
 > Tim

--
+--------------- my people are the people of the dessert, ---------------+
| Steve Edberg                                      [EMAIL PROTECTED] |
| University of California, Davis                          (530)754-9127 |
| Programming/Database/SysAdmin               http://pgfsun.ucdavis.edu/ |
+---------------- said t e lawrence, picking up his fork ----------------+
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