PHP printing Yang Hui triangle graphic tutorial

PHP prints Yang Hui's triangle as shown in the picture:

Use PHP programming to generate any row of Yang Hui triangles.

function yanghui($line)
{
 echo ""; for($i=1;$i { echo ""; for($j=1;$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 " 





";
}