Stringy\Stringy::isHexadecimal PHP Метод

Returns true if the string contains only hexadecimal chars, false otherwise.

public isHexadecimal ( ) : boolean
Результат	boolean	Whether or not $str contains only hexadecimal chars

    public function isHexadecimal()
    {
        return $this->matchesPattern('^[[:xdigit:]]*$');
    }