Two methods of printing Yang Hui triangle with PHP

Example 1, print Yang Hui triangle directly in a loop.

//Yang Hui Triangle
for ($i=6;$i >= 0;$i--)
{
for ($j=$i;$j < = 6;$j++)
{
if ($j <= 6-1)
{
echo "a";
}else
{
echo " ";
}
}
}
?>

Example 2, PHP prints Yang Hui's triangle custom function

Input the order of Yang Hui's triangle:


//Yang Hui Triangle Custom function
function yanghui($line)
{
echo ""; for($i=1;$i<=$line;$i++) { echo ""; for($j=1;$j<=$i;$j++) { $yh[$i][1]=1; if ($i==$j) $yh[$i][ $j]=1; else $yh[$i][$j]=$yh[$i-1][$j-1]+$yh[$i-1][$j]; echo " "; } echo " "; } echo "

 "; 
echo $yh[$i][$j]; 
echo " 



";
}
if($_POST['submit']) yanghui($_POST['givenlines']);
?>