printing stars in pyramid shape

for($i=1;$i<=$n;$i++)
{
for($j=1;$j<=$n-$i;$j++)
echo(" ");
for($j=1;$j<=2*$i-1;$j++)
echo(" *");
echo("<br />");
}
its a correct r not .........i work out it....i have some errors.....any one help me.. the output will be
*
* *
* * *
* * * *
* * * * *

 

you will only need two loops to achieve this..

 

for($i = 0; $i < $length; $i++){
for($j = 0; $j < $i; $j++){
echo "*";
}
echo "\n";
}