Example of implementing Yang Hui's triangle using PHP

Example, PHP code to implement Yang Hui's triangle.

error_reporting(0);
// $iLine=5;
//Output Yang Hui triangle
function YangHui($iLine )
{
 for ($i = 0;$i <= $iLine;$i++)//row
 {
 for ($j = 0;$j <= $i;$j++)//column
 {
 if ($i == $j)//row = column (that is, the last column) or the first row and the first column
 {
 $a[$i][$j] = 1;
 echo $a [$i][$j]."";
 }
 else if ($i != 0 && $j == 0)//row=column (that is, the last column) or the first row and First column
 {
 $a[$i][$j] = 1;
 echo $a[$i][$j]." ";
 }

 else
 {
 $a[$i ][$j] = $a[$i-1][$j]+$a[$i-1][$j-1];//The value of the row + column = the sum of the 2 values ​​​​of the previous row
 echo $a[$i][$j]." ";
 }
 }
 }
 // return $a;
}

YangHui(5);
?>