foreach with multidimensional arrays

[timbr8ks]

I have a table with four columns across and five rows down. Within each cell, is a combination of the row and the column. Each cell contains a checkbox, and the user can indicate the combination of rows and columns that apply to him.

I currently have each checkbox coded like this:

<input type="checkbox" name="var[<?=$colnum;?>]" value="<?=$rownum;?>">

(I've also tried name="var[<?=$colnum;?>][]")

What you end up with is a multidimensional array containing each combination or rows and columns that's been selected.

When I process this form, I need to know which combinations were selected. So, I've been attempting to run through this with foreach. Just to see if the variables are right, I do this:

foreach ($_POST['var'] AS $key => $value) {
	echo "Column: $key<br>";
	echo "Row: $value<br><br>";
}

However, this only gives me a single result for each column, even if multiple rows are selected for that column. Also, the row result shows up as "Array."

So, I tried this:

foreach ($_POST['var'] AS $key) {
	foreach ($key AS $value) {
		echo "Column: $key<br>";
		echo "Row: $value<br><br>";
	}
}

This gives me the right number of results, but now Column says "Array."

What am I doing wrong here?

Thanks.

[NogDog]

If I'm reading you correctly, I think you want something like:

foreach($_POST['var'] as $col => $row)
{
   echo "<h2>Column: $col</h2>\n<ul>\n";
   foreach($row as $val)
   {
      echo "<li>$val</li>\n";
   }
   echo "</ul>\n";
}

(The HTML is just for a quick display, obviously you'll probably want to do something different with the data.)

PS: If that's not it, doing a quick echo "<pre>".print_r($_POST, true)."</pre>"; might be useful to see what the actual array structure is.

[Weedpacket]

And if you want the checkboxes to be arranged in a two-dimensional array, then name="var[colnum][rownum]" would do that.