number.php

	
class Number {
	private $precision;
	private $int;
	
	public function __construct($number)
	{
		$this->precision = (int)$this->getPrecision($number);
		$this->int = pow(10, $this->precision) * $number;
		
	}
	
	public function add($number)
	{
		$precision = $this->getPrecision($number);
		$this->updatePrecision($precision);
		$this->int = (int)($this->int + pow(10, $this->precision) * $number);
	}
	
	public function subtract($number)
	{
		$precision = $this->getPrecision($number);
		$this->updatePrecision($precision);
		$this->int = (int)($this->int - pow(10, $this->precision) * $number);
	}
	
	public function getNumber()
	{
		return $this->int/pow(10, $this->precision);
	}
	
	private function getPrecision($number)
	{
		$list = explode('.', (string)$number);
		if (empty($list[1])) {
			return 0;
		}
		
		return strlen((string)$list[1]);
	}
	
	private function updatePrecision($precision)
	{
		if ($this->precision >= $precision) {
			return;
		}
		$this->int = (int)($this->int * pow(10, ($precision - $this->precision)));
		$this->precision = $precision;
	}
}


for ($i = new Number(0); $i->getNumber() <= 1; $i->add(0.1)) {
	echo  (int)($i->getNumber() * 10) . PHP_EOL;
}

for ($i = 0; $i <= 1; $i += 0.1) {
	echo   (int)($i*10) . PHP_EOL;
}