variable form loop

[Anon]

I have a form consisting of 7 input=text. They are named a1, a2 , a3 etc.

I want to create a loop which checks these fields after posting the form. I want to check if they have any value. This doesn't work but please help me to correct it;

for ($i=1;$i<=7;$i++)
{
if ($a$i)
{
$numberoffilledfields++;
}
}

Thanks

[jamie_webstart]

Use the code below. It's in the manual under variable variables somewhere if you need more info.

for ($i=1; $i<8; $i++)
{
$variable_name = "a".$i+1;
if ($$variable_name)
{
$num_filled_fields++;
}
}

Note that to do the for loop 7 times starting with 1, you need to check that the index is less than 8, not 7.

Hope that helps,

Jamie.