PHP PROGRAM TO GENERATE FIBONACCI SERIES - STUDENTSBLOG100 PHP TUTORIAL

This program is to display or generate Fibonacci series up to given input range. In the below given program, input variable is declared as $input_Num.

What is Fibonacci Series?
Addition of current number with preceding number is called as Fibonacci Series. Example, (0 + 1 = 1), (1 + 1 = 2), (2 + 1 = 3), (3 + 2 = 5)... and goes on. Result is 0,1,1,2,3,5....

Programming Logic:

• Get the first number in variable $First_Num as 0 and second number in variable $Second_Num as 1. 
• First add $Second_Num and $First_Num and store it in $result variable.
• Now change $First_Num as $Second_Num and $Second_Num as $First_Num
• Loop the process again and again up to input limit. 

Displaying Fibonacci Series PHP program:

<?php $input_Num = 10; $First_Num = 0; $Second_Num = 1; $res = 0; for($i =1; $i<=$input_Num; $i++) { $result = $Second_Num + $First_Num; echo $result.","; $First_Num = $Second_Num; $Second_Num = $result; } ?> Output:

1,2,3,5,8,13,21,34,55,89,

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