PHP implements Fibonacci sequence method

This article mainly introduces the code sharing of Fibonacci sequence in PHP. It has certain reference value. Friends in need can refer to it. I hope it can help everyone.

The Fibonacci sequence refers to a sequence of numbers 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597 , 2584, 4181, 6765, 10946, 17711, 28657, 46368...

This sequence starts from the 3rd item, and each item is equal to the sum of the previous two items.

F0=0, F1=1, Fn=F(n-1)+F(n-2)

Recursive version and non-recursive version.

As a C and Java programmer, the first time I wrote non-recursive code, I forgot to add $ before the variable. , sad.

Output result

Array ( [0] => 1 [1] => 1 [2] => 2 [3] => 3 [4] => 5 [5] => 8 [6] => 13 [7] => 21 [8] => 34 [9] => 55 ) ------------------ 55

Have you learned how to strike? Hurry up and give it a try.

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