Is there a way to target only certain form elements for reading?

I'm looking to pluck a value out of the form, and I know that the value I'm looking for will either be in field 10,20,30,40,50 ... and so on. The field I'm targeting will always be a multiple of ten.

At present I'm parsing all of the fields until I find it, but this seems wasteful, as I only need to search every tenth field.

On a related note, is there a maximum limit (chars) that PHPwill accept. In other words, can a form have 500 fields?

Thank you.

i think you'd better use JavaScript for that... you may target a element you want using it's name, or using special JS's arrays...

nah, lets say your fields are named;

var1
var2
var3...... (etc)

Then a control field that has the maximum number, lets say you have 100 fields, its value will be 100;

vartotal value="100"

You could then do this in PHP;

for($i=10;$i<=$_POST['vartotal'];$i++) {
if($_POST['var'.$i]=="what_I_am_looking_for") {
do stuff...
}
}

I assume you're using a for loop to do this. How about getting the loop to count (say) from 0 to 10 instead of 0 to 1000, then mulitplying:

PHP Code:

for($i=0; $i<11; $i++)
{
if($field[($i*10)).....
} 


Or using if instead:

PHP Code:

if($fieldnum % 10 ==0)
{
Process field
} 


Hi,

I would make all the fields in the form part of the same array, and then run a for loop to check each multiple of 10. The form processing code would go inside the for loop.

Conker

Can you elaborate on the $fieldnum a bit ... does this imply PHP keeps a running count of all forms args that come thru?

no, he was just naming it to represent $i.