[RESOLVED] variable $_POST array problem...

[lisa99]

Hello.

I seem to remember using variables for $_POST array keys, but I'm not able to get it to work now.

For example: if I posted checkboxes with the names id_1, id_2, id_3, etc. and value when checked "Y" shouldn't I be able to get it back like this?

foreach($_POST as $k => $v)
{
$x=explode("_", $k);
if($x[0]=="id"){$newvalue=$_POST['id_".$x[1]."']} //the problem is $_POST['id_".$x[1]."']
echo"$k is $newvalue <br />";
}

Is something like this possible?

[dagon]

why not just use the id as the values for the checkbox in the first place?

[lisa99]

The code I posted is not exactly what I'm using (what I'm using is quite long) but displays the concept I'm trying to find a solution for.

The checkboxes are dynamic, so I don't know how many I will have at any given moment except that they all have a text field next to them with the same name. Example "somename_checkbox1" and "somename_text1". While looping through the values of "somename_textX" fields, I want to check for the existence of "somename_checkboxX" to see if it was posted since checkboxes won't post when they are not checked and I may need to change the value stored in mysql.

I hope that made sense...

[dagon]

Ruff html

<input type='checkbox' name=foo[] value=1>
<input type='checkbox' name=foo[] value=2>

you then have an array called foo in $_POST with numeric keys, and values matching the checked boxes

[lisa99]

Nevermind. I was correct in the first place. Using this format works:

$POST['id'.$x[1]]

I just missed a backslash in the echoed php that I used to build the form which was the reason I couldn't see it in the processing script.

Thanks for your help.

[dagon]

there is still no reason to have to use explode() in the first place your just adding overhead with no value, but its your call