class.ilLinkButton.php

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<?php

class ilLinkButton extends ilButtonBase
{
    protected string $url = "";
    protected string $target = "";

    public static function getInstance(): self
    {
        return new self(self::TYPE_LINK);
    }


    //
    // properties
    //

    public function setUrl(string $a_value): void
    {
        $this->url = trim($a_value);
    }

    public function getUrl(): string
    {
        return $this->url;
    }

    public function setTarget(string $a_value): void
    {
        $this->target = trim($a_value);
    }

    public function getTarget(): string
    {
        return $this->target;
    }


    //
    // render
    //

    protected function renderCaption(): string
    {
        return '&nbsp;' . $this->getCaption() . '&nbsp;';
    }

    protected function renderAttributes(array $a_additional_attr = null): string
    {
        if ('_blank' === $this->getTarget()) {
            $relAttrVal = 'noopener';

            if (isset($a_additional_attr['rel'])) {
                if (strpos($a_additional_attr['rel'], $relAttrVal) === false) {
                    $a_additional_attr['rel'] .= ' ' . $relAttrVal;
                }
            } else {
                $a_additional_attr['rel'] = $relAttrVal;
            }
        }

        return parent::renderAttributes($a_additional_attr);
    }

    public function render(): string
    {
        $this->prepareRender();

        $attr = array();
        $attr["href"] = $this->getUrl() ?: "#";
        $attr["target"] = $this->getTarget();

        return '<a' . $this->renderAttributes($attr) . '>' .
            $this->renderCaption() . '</a>';
    }
}