How to make a triangle in PHP

<\?php
for ($size = 1; $size <= 5; $size++)
{
for ($j = 1; $j <= 5 -$size; $j++)
{
echo "  ";
}
for ($j = 1; $j <= 2*$size - 1; $j++)
{
echo("*");
}
echo "<\br>";
}

?>