Sabberworm\CSS\Parser::parseNumericValue PHP Метод

    private function parseNumericValue($bForColor = false)
    {
        $sSize = '';
        if ($this->comes('-')) {
            $sSize .= $this->consume('-');
        }
        while (is_numeric($this->peek()) || $this->comes('.')) {
            if ($this->comes('.')) {
                $sSize .= $this->consume('.');
            } else {
                $sSize .= $this->consume(1);
            }
        }
        $sUnit = null;
        foreach ($this->aSizeUnits as $iLength => &$aValues) {
            $sKey = strtolower($this->peek($iLength));
            if (array_key_exists($sKey, $aValues)) {
                if (($sUnit = $aValues[$sKey]) !== null) {
                    $this->consume($iLength);
                    break;
                }
            }
        }
        return new Size(floatval($sSize), $sUnit, $bForColor);
    }