Respect\Validation\Rules\Fibonacci::validate()

Complexity

Conditions	3
Paths	3

Size

Total Lines	15
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	3

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function validate($input)
    {
        if (!is_numeric($input)) {
            return false;
        }

        $sequence = [0, 1];
        $position = 1;
        while ($input > $sequence[$position]) {
            ++$position;
            $sequence[$position] = $sequence[$position - 1] + $sequence[$position - 2];
        }

        return $sequence[$position] === (int) $input;
    }
}