text: Fibonacci Cube Graph | function to find fibonacci number ; function for finding number of vertices in fibonacci cube graph ; return fibonacci number for f ( n + 2 ) ; Driver Code
code: < ? php function fib ( $ n ) { if ( $ n <= 1 ) return $ n ; return fib ( $ n - 1 ) + fib ( $ n - 2 ) ; } function findVertices ( $ n ) { return fib ( $ n + 2 ) ; } $ n = 3 ; echo findVertices ( $ n ) ; ? >