<?php
   $first = 0;
   $second = 1;
   $n = 30;

   $inc = 1;
   echo $first."<br>".$second."<br>";
   do{
      $inc++;
      $final = $first + $second;
      $first = $second;
      $second = $final;
      echo $final."<br>";
   }
   while ($inc < $n) ;
?>