Q. PHP Program to Print Fibonacci Series upto N terms.

Here you will find an algorithm and program in PHP to print fibonacci series. First let us understand what fibonacci series means.

Explanation : The Fibonacci sequence is a sequence consisting of a series of numbers and each number is the sum of the previous two numbers. For Example :- 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, …….

START
  Step 1->Declare variables i, a, b, nextTerm
  Step 2->Initialize the variables, a=0, b=1, and nextTerm = 0
  Step 3->Enter the number of terms of Fibonacci series to be printed
  Step 4->Repeat below steps n times
   -> print the value of a
   -> nextTerm = a + b
   -> a = b
   -> b = nextTerm
   -> increase value of i each time by 1
STOP

Fibonacci Series Program

function Fibonacci($n){
  
    $a = 0;
    $b = 1;
  
    $counter = 0;
    while ($counter < $n){
        echo ' '.$a;
        $nextTerm = $b + $a;
        $a = $b;
        $b = $nextTerm;
        $counter = $counter + 1;
    }
}
  
$n = 9;
Fibonacci($n);

Output

0 1 1 2 3 5 8 13 21