function BigInteger::toArbitraryBase

Returns a string representation of this number in an arbitrary base with a custom alphabet.

Because this method accepts an alphabet with any character, including dash, it does not handle negative numbers; a NegativeNumberException will be thrown when attempting to call this method on a negative number.

Parameters

string $alphabet The alphabet, for example '01' for base 2, or '01234567' for base 8.:

Throws

NegativeNumberException If this number is negative.

\InvalidArgumentException If the given alphabet does not contain at least 2 chars.

File

vendor/brick/math/src/BigInteger.php, line 942

Class

BigInteger

An arbitrary-size integer.

Namespace

Brick\Math

Code

public function toArbitraryBase(string $alphabet) : string {
    $base = \strlen($alphabet);
    if ($base < 2) {
        throw new \InvalidArgumentException('The alphabet must contain at least 2 chars.');
    }
    if ($this->value[0] === '-') {
        throw new NegativeNumberException(__FUNCTION__ . '() does not support negative numbers.');
    }
    return Calculator::get()->toArbitraryBase($this->value, $alphabet, $base);
}