/**
* Return additional head tags in a concatenated string
* @since Version 3.8
* @return string
*/
public function getHeadTags()
{
$tags = array();
if (count($this->rp_meta_tags)) {
foreach ($this->rp_meta_tags as $property => $content) {
$tag = '<meta property="' . $property . '" content="' . htmlentities(ContentUtility::formatText($content, ["strip_formatting" => true])) . '">';
if ($property == "og:image" || $property == "twitter:image") {
$tag = str_replace("&", "&", $tag);
}
$tags[] = $tag;
}
}
if (count($this->head_links)) {
foreach ($this->head_links as $rel => $href) {
$tag = '<link rel="' . $rel . '" href="' . htmlentities($href) . '">';
$tags[] = $tag;
}
}
if (count($this->preload['prefetch'])) {
foreach ($this->preload['prefetch'] as $href) {
$tag = '<link rel="prefetch" href="' . htmlentities($href) . '">';
$tags[] = $tag;
}
}
if (count($this->preload['prerender'])) {
foreach ($this->preload['prerender'] as $href) {
$tag = '<link rel="prerender" href="' . htmlentities($href) . '">';
$tags[] = $tag;
}
}
return implode("\n\t", array_merge($tags, $this->head_tags));
}
