Ensure compatibility with PHP 7.4, 8.0, 8.1, 8.2, 8.3

src/Schema/Rdf/RdfGraph.php

@@ -135,8 +135,10 @@ public static function fromEasyRdf(EasyRdfGraph $graph): self
  /**
  * Ensures that any EasyRdf\Graph provided by reference will be wrapped in
  * an RdfGraph.
+ *
+ * @param EasyRdfGraph|RdfGraph &$graph
  */
- public static function ensureGraphClass(EasyRdfGraph|RdfGraph &$graph): void
+ public static function ensureGraphClass(&$graph): void
  {
  $graph = ($graph instanceof EasyRdfGraph) ? self::fromEasyRdf($graph) : $graph;
  }
@@ -147,7 +149,7 @@ public static function ensureGraphClass(EasyRdfGraph|RdfGraph &$graph): void
  */
  public static function ensureGraphsClass(array &$graphs): void
  {
- array_walk($graphs, 'self::ensureGraphClass');
+ array_walk($graphs, self::class.'::ensureGraphClass');
  }
 
  /**

src/Schema/Rdf/RdfResource.php

@@ -38,8 +38,10 @@ class RdfResource implements \ArrayAccess
  /**
  * Constructor, creates the RdfResource decorating a freshly created
  * or given EasyRdf\Resource with new resource naming capabilities.
+ *
+ * @param EasyRdfGraph|RdfGraph|null $graph
  */
- public function __construct(?string $uri, EasyRdfGraph|RdfGraph|null $graph = null, ?EasyRdfResource $resource = null)
+ public function __construct(?string $uri, $graph = null, ?EasyRdfResource $resource = null)
  {
  $graph = ($graph instanceof RdfGraph) ? $graph->getEasyGraph() : $graph;
  $this->resource = $resource ?? new EasyRdfResource($uri, $graph);
@@ -281,7 +283,7 @@ public static function fromEasyRdf(EasyRdfResource $resource): self
  * Turns any EasyRdf\Resource, provided by reference, into an RdfResource.
  * Any form of resource is accepted but only EasyRdf\Resources are impacted.
  *
- * @param mixed &$resource
+ * @param &$resource mixed resource types
  */
  public static function ensureResourceClass(&$resource): void
  {
@@ -294,18 +296,18 @@ public static function ensureResourceClass(&$resource): void
  */
  public static function ensureResourcesClass(array &$resources): void
  {
- array_walk($resources, 'self::ensureResourceClass');
+ array_walk($resources, self::class.'::ensureResourceClass');
  }
 
  /**
  * Extends the capabilities of any EasyRdf\Resource provided by turning it
  * into an RdfResource.
  *
- * @param mixed $resource
+ * @param $resource mixed resource types
  *
- * @return mixed $resource
+ * @return $resource mixed but EasyRdf\Resource is wrapped into an RdfResource
  */
- public static function wrapEasyRdfResource($resource): mixed
+ public static function wrapEasyRdfResource($resource)
  {
  $resource = ($resource instanceof EasyRdfResource) ? self::fromEasyRdf($resource) : $resource;
 
@@ -318,15 +320,17 @@ public static function wrapEasyRdfResource($resource): mixed
  */
  public static function wrapEasyRdfResources(array $resources): array
  {
- array_walk($resources, 'self::ensureResourceClass');
+ array_walk($resources, self::class.'::ensureResourceClass');
 
  return $resources;
  }
 
  /**
  * Returns the corresponding EasyRdf\Resource for any RdfResource provided.
  *
- * @param mixed $resource
+ * @param $resource mixed resource types
+ *
+ * @return $resource mixed but any RdfResource will return its contained EasyRdf\resource
  */
  public static function fromRdftoEasyRdfResource($resource)
  {
@@ -341,7 +345,7 @@ public static function fromRdftoEasyRdfResource($resource)
  */
  public static function fromRdftoEasyRdfResources(array $resources): array
  {
- array_walk($resources, 'self::ensureEasyResourceClass');
+ array_walk($resources, self::class.'::ensureEasyResourceClass');
 
  return $resources;
  }
@@ -401,7 +405,8 @@ public function offsetExists($offset): bool
  /**
  * Array Access Interface: perform get at using array syntax.
  */
- public function offsetGet($offset): mixed
+ #[\ReturnTypeWillChange]
+ public function offsetGet($offset)
  {
  return $this->resource->offsetGet($offset);
  }