[SOLVED] Dynamic Loops

[dropfaith]

whats the best way to make this dynamic so the user selects how many rows they need

and it loops and creates that amount?

i also would like to limit it to 20 no idea where to go from here

<?php

for($i=5; $i>=0; $i=$i-1)
	{
		echo "<tr>";
              			echo "<td valign=\"top\" style=\"width:50px\">";
                  		echo "<input type=text name=\"Quantity[]\" size=\"5\"></td>";
			echo "</td>";
			echo "<td valign=\"top\" style=\"width:75px\"><input type=text name=\"Ingredients[]\" size=\"25\"></td>";
		echo "</tr>";

	}
?>