Logarithms.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;

use PhpOffice\PhpSpreadsheet\Calculation\Exception;

class Logarithms
{
    public static function withBase($number, $base = 10)
    {
        try {
            $number = Helpers::validateNumericNullBool($number);
            Helpers::validatePositive($number);
            $base = Helpers::validateNumericNullBool($base);
            Helpers::validatePositive($base);
        } catch (Exception $e) {
            return $e->getMessage();
        }

        return log($number, $base);
    }

    public static function base10($number)
    {
        try {
            $number = Helpers::validateNumericNullBool($number);
            Helpers::validatePositive($number);
        } catch (Exception $e) {
            return $e->getMessage();
        }

        return log10($number);
    }

    public static function natural($number)
    {
        try {
            $number = Helpers::validateNumericNullBool($number);
            Helpers::validatePositive($number);
        } catch (Exception $e) {
            return $e->getMessage();
        }

        return log($number);
    }
}