How can I print integer in triangle form

Question

I want to print integer in triangle form which look like this

    1
   121
  12321

I tried this but I do not get the actual result

Answer 1

Another integer solution:

$n = 9; 
print str_pad ("✭",$n," ",STR_PAD_LEFT) . PHP_EOL;
for ($i=0; $i<$n; $i++){
    print str_pad ("", $n - $i);
    for ($ii=-$i; $ii<=$i; $ii++){
      if ($i % 2 != 0 && $ii % 2 == 0)
        print "&#" . rand(10025,10059) . ";";
      else print $i - abs($ii) + 1;
    }
    print PHP_EOL;
}

        ✭
        1 
       1✬1 
      12321 
     1❊3✪3✳1 
    123454321 
   1✼3✶5❃5❈3✸1
  1234567654321 
 1✾3✯5✿7❉7✫5✷3✶1 
12345678987654321 

Or if you already have the string, you could do:

$n = 9; $s = "12345678987654321"; $i = 1;

while ($i <= $n)
   echo str_pad ("", $n-$i) . substr ($s,0,$i - 1) . substr ($s,-$i++) . PHP_EOL;