links(array $links = [], string $type = 'header', bool $strictRel = true);Function to generate a set of Link elements either for HTTP header or HTML. If you are serving a web-page, it may be beneficial to send both HTTP header and the HTML tags to support wider variety of clients.
$links - is an array of arrays, where each subarray describes the Link element. At the least you require a href element, but for a fuller description, please, refer to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/link. Note that, in case some attribute is missing a link can be skipped depending on values of other attributes.
$type - the type of Link elements to generate. Default is header, meaning, that a single HTTP header Link: will be generated. The other supported values are head and body, which differ only in one extra check for body, which checks if a link is considered body-ok, but works only with $strictRel set to `true.
$strictRel - if set to true, if rel attribute is set it will be checked against a list based on https://html.spec.whatwg.org/multipage/links.html#linkTypes and https://microformats.org/wiki/existing-rel-values#formats, meaning against rel values, that have to be supported by clients. If you are using something "special", set this to false. Personally, in such cases, I would recommend splitting the set of Link elements you have into 2 sets: standard and non-standard.