Dynamic Variable Names

[Michael J. Astrauskas]

I have a shopping cart page that allows a user to type in a new
quantity and press a [Submit] button. The quantities entered are in form
text boxes with the names "item302", "item7812", etc. reflecting which
item that particular textbox is associated to. I store the entered
variables using 'import_request _variables("p", "p_")' so I end up with
$item302, $item7812, etc. My script looks for these variables by looking
through the shopping cart array which stores the item numbers themselves
and then checks the value of $item<whatever> .

If I have a number stored in $item is there any easy way to tell PHP
to check the value of variable $p_item<item>?

For example, if $item is '302' how can I tell PHP to evaluate $p_item302?

Thank you!

--
- Michael J. Astrauskas

P.S. I'm currently doing this using the eval() function, but I don't
like that technique.

[127.0.0.1]

Re: Dynamic Variable Names

Michael J. Astrauskas wrote:
[color=blue]
> For example, if $item is '302' how can I tell PHP to evaluate
> $p_item302?[/color]

Try:

$varname = sprintf("p_item %d", $item);
echo($$varname)

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[Timo Henke]

Re: Dynamic Variable Names

127.0.0.1 wrote:[color=blue]
> Michael J. Astrauskas wrote:
>[color=green]
>> For example, if $item is '302' how can I tell PHP to evaluate
>> $p_item302?[/color]
>[/color]

Try to define a dynamic Var:

$item = "ABC";

${"p_item{$item }"} = "value of this var";

print $p_itemABC;

would output "value of this var";

greetings .. timo

[Nikolai Chuvakhin]

Re: Dynamic Variable Names

"Michael J. Astrauskas" <trevie@cox.net > wrote in message
news:<himfb.463 12$vj2.21136@fe d1read06>...[color=blue]
>
> if $item is '302' how can I tell PHP to evaluate $p_item302?[/color]

Use a variable variable:

$name = 'p_item' . $item;
$value = $$name;

Since $name evaluates to 'p_item302', $$name must evaluate
to $p_item302. See the Manual for details:

http://www.php.net/variables.variable

Cheers,
NC

[Michael J. Astrauskas]

Re: Dynamic Variable Names

Nikolai Chuvakhin wrote:
[color=blue]
> Michael J. Astrauskas" wrote:
>[color=green]
>> if $item is '302' how can I tell PHP to evaluate $p_item302?[/color]
>
> Use a variable variable:
>
> $name = 'p_item' . $item;
> $value = $$name;[/color]

Thank you! I combined what you and Timo Henke suggested and it works
beautifully!

Here is my final code:
$v = ${'p_ITEM'.$key };

--
- Michael J. Astrauskas