From: Roland Häder <roland@mxchange.org>
Date: Thu, 21 Aug 2025 22:22:20 +0000 (+0200)
Subject: Continued:
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=b8cae20b349dee78d98a18697b585a9a6266ea80;p=core.git

Continued:
- yet even more type-hints ...
---

diff --git a/framework/main/classes/file_directories/binary/class_BaseBinaryFile.php b/framework/main/classes/file_directories/binary/class_BaseBinaryFile.php
index dfcce1b7..f38b417d 100644
--- a/framework/main/classes/file_directories/binary/class_BaseBinaryFile.php
+++ b/framework/main/classes/file_directories/binary/class_BaseBinaryFile.php
@@ -664,7 +664,7 @@ abstract class BaseBinaryFile extends BaseAbstractFile implements BinaryFile {
 	 * @return	$status		Status of file seek: 0 = success, -1 = failed
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 */
-	public function seek (int $offset, int $whence = SEEK_SET) {
+	public function seek (int $offset, int $whence = SEEK_SET): int {
 		// Validate parameter
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-BINARY-FILE: offset=%d,whence=%d - CALLED!', $offset, $whence));
 		if ($offset < 0) {
@@ -687,7 +687,7 @@ abstract class BaseBinaryFile extends BaseAbstractFile implements BinaryFile {
 	 * @return	$data	Data read from file
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 */
-	public function read (int $bytes = 0) {
+	public function read (int $bytes = 0): string {
 		// Validate parameter
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-BINARY-FILE: bytes=%d - CALLED!', $bytes));
 		if ($bytes < 0) {
@@ -921,7 +921,8 @@ abstract class BaseBinaryFile extends BaseAbstractFile implements BinaryFile {
 
 		// Now simply write a NUL there. This will pre-allocate the file.
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-BINARY-FILE: Invoking this->writeAtPosition(%d,NUL) ...', $seekPosition));
-		$this->writeAtPosition($seekPosition, chr(0));
+		$status = $this->writeAtPosition($seekPosition, chr(0));
+		// @TODO Handle $status properly
 
 		// Is the seek position zero?
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-BINARY-FILE: fileSize=%d', $fileSize));
diff --git a/framework/main/classes/file_directories/input/raw/class_FrameworkRawFileInputPointer.php b/framework/main/classes/file_directories/input/raw/class_FrameworkRawFileInputPointer.php
index 734b97b7..edbf2ffc 100644
--- a/framework/main/classes/file_directories/input/raw/class_FrameworkRawFileInputPointer.php
+++ b/framework/main/classes/file_directories/input/raw/class_FrameworkRawFileInputPointer.php
@@ -141,7 +141,7 @@ class FrameworkRawFileInputPointer extends BaseFileIo implements InputPointer {
 	 * @throws	InvalidArgumentException	If a parameter is not valid
 	 * @throws	UnexpectedValueException	If fread() returns a non-string value
 	 */
-	public function read (int $bytes = 0) {
+	public function read (int $bytes = 0): string {
 		// Trace message
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('RAW-FILE-INPUT-POINTER: bytes=%d - CALLED!', $bytes));
 		if ($bytes < 0) {
diff --git a/framework/main/classes/file_directories/input/text/class_FrameworkTextFileInputPointer.php b/framework/main/classes/file_directories/input/text/class_FrameworkTextFileInputPointer.php
index 31182978..acfd75ad 100644
--- a/framework/main/classes/file_directories/input/text/class_FrameworkTextFileInputPointer.php
+++ b/framework/main/classes/file_directories/input/text/class_FrameworkTextFileInputPointer.php
@@ -126,7 +126,7 @@ class FrameworkTextFileInputPointer extends BaseFileIo implements InputPointer {
 	 * @throws	NullPointerException	If the file pointer instance is not set by setFileObject()
 	 * @throws	LogicException	If $fileObject is not an object
 	 */
-	public function read (int $bytes = 0) {
+	public function read (int $bytes = 0): string {
 		// Some sanity checks
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('RAW-FILE-INPUT-POINTER: bytes=%d - CALLED!', $bytes));
 		if ($bytes < 0) {
diff --git a/framework/main/classes/file_directories/io/class_FrameworkFileInputOutputPointer.php b/framework/main/classes/file_directories/io/class_FrameworkFileInputOutputPointer.php
index b3b4e56e..02fa81a0 100644
--- a/framework/main/classes/file_directories/io/class_FrameworkFileInputOutputPointer.php
+++ b/framework/main/classes/file_directories/io/class_FrameworkFileInputOutputPointer.php
@@ -239,7 +239,7 @@ class FrameworkFileInputOutputPointer extends BaseFileIo implements InputOutputP
 	 * @return	$data	Data read from file
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 */
-	public function read (int $bytes = 0) {
+	public function read (int $bytes = 0): string {
 		// Validatre parameter
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('FILE-INPUT-OUTPUT-POINTER: bytes=%d - CALLED!', $bytes));
 		if ($bytes < 0) {
diff --git a/framework/main/classes/file_directories/io_stream/class_FileIoStream.php b/framework/main/classes/file_directories/io_stream/class_FileIoStream.php
index b47eb023..34d16faf 100644
--- a/framework/main/classes/file_directories/io_stream/class_FileIoStream.php
+++ b/framework/main/classes/file_directories/io_stream/class_FileIoStream.php
@@ -317,7 +317,7 @@ class FileIoStream extends BaseFrameworkSystem implements FileInputStreamer, Fil
 	 * @return	$data	The data (string mostly) to "stream"
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function streamData (string $data) {
+	public function streamData (string $data): string {
 		// Not supported
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('FILE-IO-STREAM: data=()=%d - CALLED!', strlen($data)));
 		throw new UnsupportedOperationException([$this, __FUNCTION__], FrameworkInterface::EXCEPTION_UNSPPORTED_OPERATION);
diff --git a/framework/main/classes/file_directories/output/raw/class_FrameworkRawFileOutputPointer.php b/framework/main/classes/file_directories/output/raw/class_FrameworkRawFileOutputPointer.php
index 25634755..6517c55c 100644
--- a/framework/main/classes/file_directories/output/raw/class_FrameworkRawFileOutputPointer.php
+++ b/framework/main/classes/file_directories/output/raw/class_FrameworkRawFileOutputPointer.php
@@ -137,7 +137,7 @@ class FrameworkRawFileOutputPointer extends BaseFileIo implements OutputPointer
 	 * @return	mixed			Number of writes bytes or false on error
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function writeAtPosition (int $seedPosition, string $data): void {
+	public function writeAtPosition (int $seedPosition, string $data): mixed {
 		throw new UnsupportedOperationException([$this, __FUNCTION__], FrameworkInterface::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
diff --git a/framework/main/classes/file_directories/output/text/class_FrameworkTextFileOutputPointer.php b/framework/main/classes/file_directories/output/text/class_FrameworkTextFileOutputPointer.php
index fa968671..754b5ed2 100644
--- a/framework/main/classes/file_directories/output/text/class_FrameworkTextFileOutputPointer.php
+++ b/framework/main/classes/file_directories/output/text/class_FrameworkTextFileOutputPointer.php
@@ -133,7 +133,7 @@ class FrameworkTextFileOutputPointer extends BaseFileIo implements OutputPointer
 	 * @return	mixed			Number of writes bytes or false on error
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function writeAtPosition (int $seedPosition, string $data) {
+	public function writeAtPosition (int $seedPosition, string $data): mixed {
 		throw new UnsupportedOperationException([$this, __FUNCTION__], FrameworkInterface::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
diff --git a/framework/main/classes/handler/class_BaseHandler.php b/framework/main/classes/handler/class_BaseHandler.php
index ef63de38..3dd8a67d 100644
--- a/framework/main/classes/handler/class_BaseHandler.php
+++ b/framework/main/classes/handler/class_BaseHandler.php
@@ -59,7 +59,7 @@ abstract class BaseHandler extends BaseFrameworkSystem implements HandleableData
 	 *
 	 * @return	$handlerName	Name of this handler
 	 */
-	public final function getHandlerName () {
+	public final function getHandlerName (): string {
 		return $this->handlerName;
 	}
 
@@ -69,7 +69,7 @@ abstract class BaseHandler extends BaseFrameworkSystem implements HandleableData
 	 * @param	$handlerName	Name of this handler
 	 * @return	void
 	 */
-	protected final function setHandlerName (string $handlerName) {
+	protected final function setHandlerName (string $handlerName): void {
 		$this->handlerName = $handlerName;
 	}
 
@@ -81,7 +81,7 @@ abstract class BaseHandler extends BaseFrameworkSystem implements HandleableData
 	 * @return	void
 	 * @todo	Rewrite this to use DHT
 	 */
-	public function addArrayToDataSet (StoreableCriteria $dataSetInstance, array $messageData) {
+	public function addArrayToDataSet (StoreableCriteria $dataSetInstance, array $messageData): void {
 		// Check parameter
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-HANDLER: dataSetInstance=%s,messageData()=%d - CALLED!', $dataSetInstance->__toString(), count($messageData)));
 		if (count($messageData) == 0) {
diff --git a/framework/main/classes/index/file/class_BaseFileIndex.php b/framework/main/classes/index/file/class_BaseFileIndex.php
index 126a93f3..f332c3bf 100644
--- a/framework/main/classes/index/file/class_BaseFileIndex.php
+++ b/framework/main/classes/index/file/class_BaseFileIndex.php
@@ -287,7 +287,7 @@ abstract class BaseFileIndex extends BaseIndex implements FileIndexer {
 	 * @throws	InvalidArgumentException	If the parameter is not valid
 	 * @todo	Unfinished work
 	 */
-	public function searchNextGap (int $length) {
+	public function searchNextGap (int $length): int {
 		// Validate parameter
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-FILE-INDEX: length=%d - CALLED!', $length));
 		if ($length <= 0) {
@@ -308,7 +308,7 @@ abstract class BaseFileIndex extends BaseIndex implements FileIndexer {
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 * @throws	InvalidArgumentException	If a parameter is not valid
 	 */
-	public function writeAtPosition (int $seekPosition, string $dataStream) {
+	public function writeAtPosition (int $seekPosition, string $dataStream): mixed {
 		// Validate parameter
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-FILE-INDEX: seekPosition=%d,dataStream(%d)=%s - CALLED!', $seekPosition, strlen($dataStream), $dataStream));
 		if ($seekPosition < 0) {
@@ -333,7 +333,7 @@ abstract class BaseFileIndex extends BaseIndex implements FileIndexer {
 	 *
 	 * @return	$isLoaded	Whether this index has been loaded
 	 */
-	public function isIndexLoaded () {
+	public function isIndexLoaded (): bool {
 		// Is the file gaps-only?
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-FILE-INDEX: CALLED!');
 		if ($this->getIteratorInstance()->getBinaryFileInstance()->isFileGapsOnly()) {
diff --git a/framework/main/classes/index/file/stack/class_FileStackIndex.php b/framework/main/classes/index/file/stack/class_FileStackIndex.php
index ea8ef7ca..7e538626 100644
--- a/framework/main/classes/index/file/stack/class_FileStackIndex.php
+++ b/framework/main/classes/index/file/stack/class_FileStackIndex.php
@@ -54,7 +54,7 @@ class FileStackIndex extends BaseFileIndex implements IndexableStack, Registerab
 	 * @param	$fileInfoInstance	An instance of a SplFileInfo class
 	 * @return	$indexInstance	An instance of this Index class
 	 */
-	public final static function createFileStackIndex (SplFileInfo $fileInfoInstance) {
+	public final static function createFileStackIndex (SplFileInfo $fileInfoInstance): IndexableStack {
 		// Get a new instance
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: fileInfoInstance[%s]=%s - CALLED!', get_class($fileInfoInstance), $fileInfoInstance));
 		$indexInstance = new FileStackIndex();
@@ -76,7 +76,7 @@ class FileStackIndex extends BaseFileIndex implements IndexableStack, Registerab
 	 * @throws	InvalidArgumentException	If a parameter is not valid
 	 * @throws	UnexpectedValueException	If an invalid gap position is being returned
 	 */
-	public function addHashedDataToIndex (string $stackName, array $data) {
+	public function addHashedDataToIndex (string $stackName, array $data): void {
 		// Validate parameter
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: stackName=%s,data()=%d - CALLED!', $stackName, count($data)));
 		if (empty($stackName)) {
diff --git a/framework/main/classes/iterator/file/class_FileIterator.php b/framework/main/classes/iterator/file/class_FileIterator.php
index 759e6ed1..5915427c 100644
--- a/framework/main/classes/iterator/file/class_FileIterator.php
+++ b/framework/main/classes/iterator/file/class_FileIterator.php
@@ -164,7 +164,7 @@ class FileIterator extends BaseIterator implements SeekableIterator {
 	 * @return	void
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 */
-	public function seek (int $seekPosition): seek {
+	public function seek (int $seekPosition): int {
 		// Validate parameter
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('FILE-ITERATOR: seekPosition=%d,whence=%d - CALLED!', $seekPosition, $whence));
 		if ($seekPosition < 0) {
diff --git a/framework/main/classes/output/class_ b/framework/main/classes/output/class_
index 9d6a07e2..1dfe1085 100644
--- a/framework/main/classes/output/class_
+++ b/framework/main/classes/output/class_
@@ -51,11 +51,11 @@ class ???Output extends BaseOutput implements OutputStreamer, Registerable {
 	 * @param	$applicationInstance	An instance of a ManageableApplication class
 	 * @return	$debugInstance			An instance of this middleware class
 	 */
-	public static final function createWebOutput (ManageableApplication $applicationInstance) {
+	public static final function create???Output (ManageableApplication $applicationInstance): OutputStreamer {
 		// Is the self-instance already set?
 		if (is_null(self::$!!!Instance)) {
 			// Get a new instance and set it
-			self::$!!!Instance = new WebOutput();
+			self::$!!!Instance = new ???Output();
 
 			// Get the content type
 			$contentType = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('!!!_content_type');
@@ -79,7 +79,7 @@ class ???Output extends BaseOutput implements OutputStreamer, Registerable {
 	 * @return	void
 	 * @todo	0% done
 	 */
-	public final function output ($outStream = false, $stripTags = false) {
+	public final function output ($outStream = false, $stripTags = false): void {
 		DebugMiddleware::getSelfInstance()->partialStub('Please implement this method. outStream()=' . strlen($outStream) . ',stripTags=' . intval($stripTags));
 	}
 
@@ -89,7 +89,7 @@ class ???Output extends BaseOutput implements OutputStreamer, Registerable {
 	 * @return	$seekPosition	Current seek position
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function determineSeekPosition () {
+	public function determineSeekPosition (): int {
 		throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
@@ -112,7 +112,7 @@ class ???Output extends BaseOutput implements OutputStreamer, Registerable {
 	 * @return	$size	Size (in bytes) of file
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function size () {
+	public function size (): int {
 		throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
diff --git a/framework/main/classes/request/class_BaseRequest.php b/framework/main/classes/request/class_BaseRequest.php
index 26b18d89..5c126958 100644
--- a/framework/main/classes/request/class_BaseRequest.php
+++ b/framework/main/classes/request/class_BaseRequest.php
@@ -56,7 +56,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 * @param	$element	Name of the request element we want to check
 	 * @return	$isSet		Whether the request element is set
 	 */
-	public function isRequestElementSet (string $element) {
+	public function isRequestElementSet (string $element): bool {
 		// Is this element found?
 		$isSet = isset($this->requestData[$element]);
 
@@ -71,7 +71,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 * @return	$value		Value of the found request element or 'null' if the
 	 *						element was not found
 	 */
-	public function getRequestElement (string $element) {
+	public function getRequestElement (string $element): mixed {
 		// Initialize value
 		$value = NULL;
 
@@ -95,7 +95,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 * @param	$value		Value to set
 	 * @return	void
 	 */
-	public function setRequestElement (string $element, $value) {
+	public function setRequestElement (string $element, mixed $value): void {
 		$this->requestData[$element] = $value;
 	}
 
@@ -105,7 +105,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 * @param	$requestData	Request element to se
 	 * @return	void
 	 */
-	public function setRequestData (array $requestData) {
+	public function setRequestData (array $requestData): void {
 		$this->requestData = $requestData;
 	}
 
@@ -114,7 +114,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 *
 	 * @return	$array	An array containing all array keys to return
 	 */
-	public function getParameterNames () {
+	public function getParameterNames (): array {
 		return array_keys($this->requestData);
 	}
 
@@ -124,7 +124,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 * @param	$isValid	Whether the request is valid
 	 * @return	void
 	 */
-	public final function setIsRequestValid (bool $isValid) {
+	public final function setIsRequestValid (bool $isValid): void {
 		$this->isRequestValid = $isValid;
 	}
 
@@ -133,7 +133,7 @@ abstract class BaseRequest extends BaseFrameworkSystem {
 	 *
 	 * @return	$isRequestValid		Whether this request is valid
 	 */
-	public final function isRequestValid () {
+	public final function isRequestValid (): bool {
 		return $this->isRequestValid;
 	}
 
diff --git a/framework/main/classes/stacker/file/class_BaseFileStack.php b/framework/main/classes/stacker/file/class_BaseFileStack.php
index 17af2c39..1a34a2c6 100644
--- a/framework/main/classes/stacker/file/class_BaseFileStack.php
+++ b/framework/main/classes/stacker/file/class_BaseFileStack.php
@@ -208,7 +208,8 @@ abstract class BaseFileStack extends BaseStacker {
 
 		// Write it to disk (header is always at seek position 0)
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-FILE-STACK: Invoking this->iteratorInstance->writeAtPosition(0, header=%s) ...', $header));
-		$this->getIteratorInstance()->getBinaryFileInstance()->writeAtPosition(0, $header);
+		$status = $this->getIteratorInstance()->getBinaryFileInstance()->writeAtPosition(0, $header);
+		// @TODO Handle $status
 
 		// Trace message
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-FILE-STACK: EXIT!');
diff --git a/framework/main/interfaces/handler/class_HandleableDataSet.php b/framework/main/interfaces/handler/class_HandleableDataSet.php
index 42be03fb..237b2337 100644
--- a/framework/main/interfaces/handler/class_HandleableDataSet.php
+++ b/framework/main/interfaces/handler/class_HandleableDataSet.php
@@ -36,6 +36,13 @@ interface HandleableDataSet extends Handleable {
 	 * @param	$messageData		An array with all message data
 	 * @return	void
 	 */
-	function addArrayToDataSet (StoreableCriteria $dataSetInstance, array $messageData);
+	function addArrayToDataSet (StoreableCriteria $dataSetInstance, array $messageData): void;
+
+	/**
+	 * Getter for handler name
+	 *
+	 * @return<>$handlerNameName of this handler
+	 */
+	function getHandlerName (): string;
 
 }
diff --git a/framework/main/interfaces/handler/task/class_HandleableTask.php b/framework/main/interfaces/handler/task/class_HandleableTask.php
index c7ace208..1e7fa600 100644
--- a/framework/main/interfaces/handler/task/class_HandleableTask.php
+++ b/framework/main/interfaces/handler/task/class_HandleableTask.php
@@ -37,7 +37,7 @@ interface HandleableTask extends HandleableDataSet {
 	 * @param	$taskInstanc	An instanceof a Taskable class
 	 * @return	$taskName		Name of the task as used while registration
 	 */
-	function searchTask (Taskable $taskInstance);
+	function searchTask (Taskable $taskInstance): string;
 
 	/**
 	 * Registers a task with a task handler.
@@ -46,7 +46,7 @@ interface HandleableTask extends HandleableDataSet {
 	 * @param	$taskInstance	An instance of a Taskable class
 	 * @return	void
 	 */
-	function registerTask (string $taskName, Taskable $taskInstance);
+	function registerTask (string $taskName, Taskable $taskInstance): void;
 
 	/**
 	 * Checks whether tasks are left including idle task
@@ -63,7 +63,7 @@ interface HandleableTask extends HandleableDataSet {
 	 *
 	 * @return	void
 	 */
-	function handleTasks ();
+	function handleTasks (): void;
 
 	/**
 	 * Shuts down all tasks and the task handler itself. This method should be
@@ -71,6 +71,6 @@ interface HandleableTask extends HandleableDataSet {
 	 * 
 	 * @return	void
 	 */
-	function doShutdown ();
+	function doShutdown (): void;
 
 }
diff --git a/framework/main/interfaces/index/class_Indexable.php b/framework/main/interfaces/index/class_Indexable.php
index f5da8e4f..9e1724e5 100644
--- a/framework/main/interfaces/index/class_Indexable.php
+++ b/framework/main/interfaces/index/class_Indexable.php
@@ -53,6 +53,6 @@ interface Indexable extends FrameworkInterface {
 	 *
 	 * @return	$isLoaded	Whether the index has been loaded
 	 */
-	function isIndexLoaded ();
+	function isIndexLoaded (): bool;
 
 }
diff --git a/framework/main/interfaces/index/file/class_FileIndexer.php b/framework/main/interfaces/index/file/class_FileIndexer.php
index e2d85910..1eae3bf7 100644
--- a/framework/main/interfaces/index/file/class_FileIndexer.php
+++ b/framework/main/interfaces/index/file/class_FileIndexer.php
@@ -36,7 +36,7 @@ interface FileIndexer extends Indexable {
 	 * @return	void
 	 * @throws	InvalidArgumentException	If a parameter is not valid
 	 */
-	function addHashedDataToIndex (string $stackName, array $data);
+	function addHashedDataToIndex (string $stackName, array $data): void;
 
 	/**
 	 * Searches for next suitable gap the given length of data can fit in
@@ -46,7 +46,7 @@ interface FileIndexer extends Indexable {
 	 * @return	$seekPosition	Found next gap's seek position
 	 * @throws	InvalidArgumentException	If the parameter is not valid
 	 */
-	function searchNextGap (int $length);
+	function searchNextGap (int $length): int;
 
 	/**
 	 * Writes at given position by seeking to it.
@@ -56,6 +56,6 @@ interface FileIndexer extends Indexable {
 	 * @return	mixed			Number of writes bytes or false on error
 	 * @throws	InvalidArgumentException	If a parameter is not valid
 	 */
-	function writeAtPosition (int $seekPosition, string $dataStream);
+	function writeAtPosition (int $seekPosition, string $dataStream): mixed;
 
 }
diff --git a/framework/main/interfaces/io/class_CloseableFile.php b/framework/main/interfaces/io/class_CloseableFile.php
index dc98cb21..0732fd93 100644
--- a/framework/main/interfaces/io/class_CloseableFile.php
+++ b/framework/main/interfaces/io/class_CloseableFile.php
@@ -37,6 +37,6 @@ interface CloseableFile extends FrameworkInterface {
 	 * @throws	NullPointerException	If the file pointer instance is not set by setFileObject()
 	 * @throws	InvalidResourceException	If there is being set
 	 */
-	function closeFile ();
+	function closeFile (): void;
 
 }
diff --git a/framework/main/interfaces/io/class_StreamableInput.php b/framework/main/interfaces/io/class_StreamableInput.php
index b3723351..7066ad3e 100644
--- a/framework/main/interfaces/io/class_StreamableInput.php
+++ b/framework/main/interfaces/io/class_StreamableInput.php
@@ -33,14 +33,14 @@ interface StreamableInput extends Streamable {
 	 *
 	 * @return	$seekPosition	Current seek position
 	 */
-	function determineSeekPosition ();
+	function determineSeekPosition (): int;
 
 	/**
 	 * Seek to given offset (default) or other possibilities as fseek() gives.
 	 *
 	 * @param	$offset		Offset to seek to (or used as "base" for other seeks)
 	 * @param	$whence		Added to offset (default: only use offset to seek to)
-	 * @return	void
+	 * @return	$position	Position after seeking (?)
 	 * @throws	OutOfBoundsException	If the position is not seekable
 	 */
 	function seek (int $offset, int $whence = SEEK_SET): int;
@@ -50,6 +50,6 @@ interface StreamableInput extends Streamable {
 	 *
 	 * @return	$size	Size (in bytes) of file
 	 */
-	function size ();
+	function size (): int;
 
 }
diff --git a/framework/main/interfaces/io/pointer/class_InputPointer.php b/framework/main/interfaces/io/pointer/class_InputPointer.php
index d0e355d0..7b2f1514 100644
--- a/framework/main/interfaces/io/pointer/class_InputPointer.php
+++ b/framework/main/interfaces/io/pointer/class_InputPointer.php
@@ -52,6 +52,6 @@ interface InputPointer extends StreamableInput, FilePointer {
 	 *									is not set by setFileObject()
 	 * @throws	InvalidResourceException	If there is being set
 	 */
-	function read (int $bytes = 0);
+	function read (int $bytes = 0): string;
 
 }
diff --git a/framework/main/interfaces/io/pointer/class_OutputPointer.php b/framework/main/interfaces/io/pointer/class_OutputPointer.php
index 039d1757..5306c0e1 100644
--- a/framework/main/interfaces/io/pointer/class_OutputPointer.php
+++ b/framework/main/interfaces/io/pointer/class_OutputPointer.php
@@ -48,6 +48,6 @@ interface OutputPointer extends StreamableOutput, FilePointer {
 	 * @param	$data			Data to be written
 	 * @return	mixed			Number of writes bytes or false on error
 	 */
-	function writeAtPosition (int $seedPosition, string $data);
+	function writeAtPosition (int $seedPosition, string $data): mixed;
 
 }
diff --git a/framework/main/interfaces/reader/class_ReadableNews.php b/framework/main/interfaces/reader/class_ReadableNews.php
index a0ec486c..27417838 100644
--- a/framework/main/interfaces/reader/class_ReadableNews.php
+++ b/framework/main/interfaces/reader/class_ReadableNews.php
@@ -33,6 +33,6 @@ interface ReadableNews extends FrameworkInterface {
 	 *
 	 * @return	void
 	 */
-	function initializeReader();
+	function initializeReader(): void;
 
 }
diff --git a/framework/main/interfaces/request/class_Requestable.php b/framework/main/interfaces/request/class_Requestable.php
index 13b8c364..c3ae75fb 100644
--- a/framework/main/interfaces/request/class_Requestable.php
+++ b/framework/main/interfaces/request/class_Requestable.php
@@ -34,7 +34,7 @@ interface Requestable extends FrameworkInterface {
 	 * @param	$element	Name of the request element we want to check
 	 * @return	$isSet		Whether the request element is set
 	 */
-	function isRequestElementSet (string $element);
+	function isRequestElementSet (string $element): bool;
 
 	/**
 	 * Getter for request element or 'null' if element was not found
@@ -43,7 +43,7 @@ interface Requestable extends FrameworkInterface {
 	 * @return	$value		Value of the found request element or 'null' if the
 	 *						element was not found
 	 */
-	function getRequestElement (string $element);
+	function getRequestElement (string $element): mixed;
 
 	/**
 	 * Setter for request elements
@@ -52,7 +52,7 @@ interface Requestable extends FrameworkInterface {
 	 * @param	$value		Value to set
 	 * @return	void
 	 */
-	function setRequestElement (string $element, $value);
+	function setRequestElement (string $element, mixed $value): void;
 
 	/**
 	 * Setter for request data array
@@ -60,14 +60,14 @@ interface Requestable extends FrameworkInterface {
 	 * @param	$requestData	Request element to se
 	 * @return	void
 	 */
-	function setRequestData (array $requestData);
+	function setRequestData (array $requestData): void;
 
 	/**
 	 * Wrapper method for array_key() function for the request data array
 	 *
 	 * @return	$array	An array containing all array keys to return
 	 */
-	function getParameterNames ();
+	function getParameterNames (): array;
 
 	/**
 	 * Sets whether the request was valid
@@ -75,13 +75,13 @@ interface Requestable extends FrameworkInterface {
 	 * @param	$isValid	Whether the request is valid
 	 * @return	void
 	 */
-	function setIsRequestValid (bool $isValid);
+	function setIsRequestValid (bool $isValid): void;
 
 	/**
 	 * Returns whether this request is valid
 	 *
 	 * @return	$isRequestValid		Whether this request is valid
 	 */
-	function isRequestValid ();
+	function isRequestValid (): bool;
 
 }
diff --git a/framework/main/middleware/io/class_FileIoHandler.php b/framework/main/middleware/io/class_FileIoHandler.php
index 2c62adda..24506c26 100644
--- a/framework/main/middleware/io/class_FileIoHandler.php
+++ b/framework/main/middleware/io/class_FileIoHandler.php
@@ -106,7 +106,7 @@ class FileIoHandler extends BaseMiddleware implements IoHandler {
 	 * @return	void
 	 * @throws	UnsupportedOperationException	If this method is called
 	 */
-	public function saveFile (SplFileInfo $infoInstance, array $dataArray) {
+	public function saveFile (SplFileInfo $infoInstance, array $dataArray): void {
 		// Trace message for logging parameters
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('FILE-IO-HANDLER: infoInstance.pathname=%s,dataArray()=%d - CALLED!', $infoInstance->getPathname(), count($dataArray)));
 		throw new UnsupportedOperationException([$this, __FUNCTION__], FrameworkInterface::EXCEPTION_UNSPPORTED_OPERATION);
@@ -155,7 +155,7 @@ class FileIoHandler extends BaseMiddleware implements IoHandler {
 	 * @param	$infoInstance	An instance of a SplFileInfo class
 	 * @return	$array	Array with the file contents
 	 */
-	public function loadFileContents (SplFileInfo $infoInstance) {
+	public function loadFileContents (SplFileInfo $infoInstance): array {
 		// Read from the input handler
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('FILE-IO-HANDLER: infoInstance=%s - CALLED!', $infoInstance->__toString()));
 		return $this->getInputStreamerInstance()->loadFileContents($infoInstance);
@@ -167,7 +167,7 @@ class FileIoHandler extends BaseMiddleware implements IoHandler {
 	 * @return	$seekPosition	Current seek position
 	 * @todo	0% done
 	 */
-	public function determineSeekPosition () {
+	public function determineSeekPosition (): int {
 		// Trace message
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('FILE-IO-HANDLER: CALLED!');
 		DebugMiddleware::getSelfInstance()->partialStub();
@@ -205,7 +205,7 @@ class FileIoHandler extends BaseMiddleware implements IoHandler {
 	 * @return	$size	Size (in bytes) of file
 	 * @todo	0% done
 	 */
-	public function size () {
+	public function size (): int {
 		// @TODO: Unfinished method:
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('FILE-IO-HANDLER: CALLED!');
 		DebugMiddleware::getSelfInstance()->partialStub();
@@ -220,7 +220,7 @@ class FileIoHandler extends BaseMiddleware implements IoHandler {
 	 * @return	$seekPosition	Current seek position
 	 * @todo	0% done
 	 */
-	public function getPosition () {
+	public function getPosition (): int {
 		// @TODO: Unfinished method:
 		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('FILE-IO-HANDLER: CALLED!');
 		DebugMiddleware::getSelfInstance()->partialStub();