Question

How to convet decimal number base-12 number in PHP

Answer 1

class DecimalToBase12 {
    // Converts a decimal number to base-12 and returns it as a string
    public static function decimalToBase12(int $decimalNumber): string {
        if ($decimalNumber === 0) {
            return "0";
        }

        $digits = str_split("0123456789AB"); // Base-12 digits (A = 10, B = 11)
        $base12 = "";

        while ($decimalNumber > 0) {
            $remainder = $decimalNumber % 12;
            $base12 .= $digits[$remainder];
            $decimalNumber = intdiv($decimalNumber, 12);
        }

        // Reverse to get the correct order
        return strrev($base12);
    }
}

// Main execution
$decimalNumber = 100;
$base12Number = DecimalToBase12::decimalToBase12($decimalNumber);
echo "Base-12 representation: $base12Number\n";

$decimalNumber = 19621;
$base12Number = DecimalToBase12::decimalToBase12($decimalNumber);
echo "Base-12 representation: $base12Number\n";



/*
run:

Base-12 representation: 84
Base-12 representation: B431

*/

 

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