I'm having a total brain freeze and can't figure this out

Basically, pretend you've got an array with 15 items. You want to print item in a table that has 5 columns and three rows. Buuutt, you want the list to go down, not across (see image). And each row has to be printed at once, so you can't just print a column at a time.

Something like... $key = $last_key + $rows... or something...

I've done it before, but my brain has totally gone blank.

It's 2am, so I didn't think of the simple way and instead jumped right into the hard way

Just created an array of $row[rownum][colnum] and then echoed it out after it was built.

I don't know if this could be declared as an "easy" approach, but I came up with the following.

You have to forgive the math formula (I was always bad w/ math)!

PHP Code:

<?php
  
  $items = Array();
  
  $items[1] = 'A';
  $items[2] = 'B';
  $items[3] = 'C';
  $items[4] = 'D';
  $items[5] = 'E';
  $items[6] = 'F';
  $items[7] = 'G';
  $items[8] = 'H';
  $items[9] = 'I';
  $items[10] = 'J';
  $items[11] = 'K';
  $items[12] = 'L';
  $items[13] = 'M';
  $items[14] = 'N';
  $items[15] = 'O';
  
  $rows = 3;
  $cols = 5;
    
  echo '<table cellpadding="8" border="1">';
  for($r = 0; $r < $rows; $r++) {
    
    echo '<tr>';
    for($i = 1; $i <= count($items) / $rows; $i++) {
      
      echo '<td>' . $items[( ($i * $rows) + ($r - $rows + 1) )] . '</td>';
    }
    
    echo '</tr>';
  }
  
  echo '</table>';
  
?>