How can I make the Isosceles trapezoid with php?

Question

like
**********
********
******

$row=3;
$columns=10;
for($i=0;$i<$rows;$i++){
for（$k=0;$k<=$i;$k+=2）{
echo "&nbsp&nbsp";
}
for($j=0;$j<$columns;$j++){
echo "*";
}
echo "<br \>"
}
what wrong?

Answer 1

I would advise you to draw the shape with client side javascript using canvas API since u are programming on the web, it will save u the trouble

PHP wasn't made to do that