» Summary  » License 

Package to calculate and manipulate Fibonacci numbers  PHP 
» Current Release  » Bug Summary 
0.8 (stable) was released on 20030102 by jmcastagnetto (Changelog) 
No open bugs Report a new bug to Math_Fibonacci 
» Description  
The Fibonacci series is constructed using the formula: F(n) = F(n  1) + F (n  2), By convention F(0) = 0, and F(1) = 1. An alternative formula that uses the Golden Ratio can also be used: F(n) = (PHI^n  phi^n)/sqrt(5) [Lucas' formula], where PHI = (1 + sqrt(5))/2 is the Golden Ratio, and phi = (1  sqrt(5))/2 is its reciprocal Requires Math_Integer, and can be used with big integers if the GMP or the BCMATH libraries are present. 

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