[thelist] Logic headache

[R.Livsey]

> I'm building a select list in PHP, to exclude certain
> directories from a search (with Ht://dig).
>
> The structure is like this:
> <select name="exclude">
> <option value="">All levels</option>
> <option value="/lv2/|/lv3/|/lv4/">Level 1</option>
> <option value="/lv1/|/lv3/|/lv4/">Level 2</option>
> <option value="/lv1/|/lv2/|/lv4/">Level 3</option>
> <option value="/lv1/|/lv2/|/lv3/">Level 4</option>
> </select>
>
> for four levels, where the option value should be all lv's
> except the current option level.
>
> I have a variable $maxlevels to count up to however many
> levels are required and  I want to make this select list work
> based on the value of $maxlevels.
>
> How would you approach the building of the list?
>
> Thanks
>
> Tony

Untested but should do the trick.
Note that is probably not the most efficient way of doing it!

<?php

$select =<<<EOD

<select name="exclude">
<option value="">All levels</option>
EOD;

for ($i=1; $i<=$maxLevels; $i++)
{
	$levels = '';
	for ($j=1; $j<=$maxLevels; $j++)
	{
		if ($i!=$j)
		{
			$levels .= "/lv$j/";
			if ($j!=$maxLevels)
				$levels .= '|';
		}
	}

	$select .=<<<EOD

<option value="$levels">Level $i</option>
EOD;
}

$select .= "</select>":

echo $select;

?>

hth

--
R.Livsey
Incutio Web Developer
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