Jyxo\HtmlTag::open PHP Method

    public function open() : string
    {
        if (TRUE === $this->contentOnly) {
            return '';
        }
        $this->isEmptyElement = isset($this->emptyElements[$this->tag]);
        $buff = '';
        foreach ($this->attributes as $name => $value) {
            if (isset(self::$attrs[$name])) {
                if (($name === 'selected' || $name === 'checked' || $name === 'readonly' || $name === 'disabled') && $value) {
                    $value = $name;
                }
                $notEmpty = $value !== null && $value !== '' && $value !== false;
                if ($this->isRequiredAttr($this->tag, $name) || $notEmpty) {
                    // For not empty attributes and the value attribute by the <option> tag
                    if (!isset($this->noEncode[$name])) {
                        $value = String::escape($value);
                    }
                    $attrString = sprintf(' %s="%s"', $name, $value);
                    if ($name === 'value') {
                        if ($this->tag === 'textarea') {
                            $buff .= '';
                        } else {
                            $buff .= $attrString;
                        }
                    } else {
                        $buff .= $attrString;
                    }
                }
            }
        }
        $buff = '<' . $this->tag . $buff . ($this->xhtml ? $this->isEmptyElement ? ' />' : '>' : '>');
        return $buff;
    }