The hypermedia links form an essential part of any web application, whether we are speaking about HTML or API formats. At the very minimum, each hypermedia link consists of a URI representing the target resource and a relationship defining how the target resource relates to the source. The target link must be an absolute URI or a relative URI, as defined by RFC 5988, or possibly a URI template as defined by RFC 6570.
The PSR-13 standard defines a series of interfaces that outline a common hypermedia format and a way to represent links between these formats:
Psr\Link\LinkInterfacePsr\Link\EvolvableLinkInterfacePsr\Link\LinkProviderInterfacePsr\Link\EvolvableLinkProviderInterface
These interfaces can be fetched via Composer as a part of the psr/link package.
The following code snippet reflects the PSR-13 Psr\Link\LinkInterface definition, which represents a single readable link object:
<?php
namespace Psr\Link;
interface LinkInterface
{
public function getHref(...