Reverted some changes that won't work with PHP7.3

src/App/Page.php

@@ -130,7 +130,7 @@ class Page implements ArrayAccess
 	 * The return value will be casted to boolean if non-boolean was returned.
 	 * @since 5.0.0
 	 */
-	public function offsetExists(mixed $offset): bool
+	public function offsetExists($offset): bool
 	{
 		return isset($this->page[$offset]);
 	}
@@ -147,7 +147,7 @@ class Page implements ArrayAccess
 	 * @return mixed Can return all value types.
 	 * @since 5.0.0
 	 */
-	public function offsetGet(mixed $offset): mixed
+	public function offsetGet($offset)
 	{
 		return $this->page[$offset] ?? null;
 	}
@@ -167,7 +167,7 @@ class Page implements ArrayAccess
 	 * @return void
 	 * @since 5.0.0
 	 */
-	public function offsetSet(mixed $offset, mixed $value): void
+	public function offsetSet($offset, $value)
 	{
 		$this->page[$offset] = $value;
 	}
@@ -184,7 +184,7 @@ class Page implements ArrayAccess
 	 * @return void
 	 * @since 5.0.0
 	 */
-	public function offsetUnset(mixed $offset): void
+	public function offsetUnset($offset)
 	{
 		if (isset($this->page[$offset])) {
 			unset($this->page[$offset]);

src/BaseCollection.php

@@ -48,7 +48,7 @@ class BaseCollection extends \ArrayIterator
 	/**
 	 * @inheritDoc
 	 */
-	public function offsetSet(mixed $offset, mixed $value): void
+	public function offsetSet($offset, $value)
 	{
 		if (is_null($offset)) {
 			$this->totalCount++;
@@ -60,7 +60,7 @@ class BaseCollection extends \ArrayIterator
 	/**
 	 * @inheritDoc
 	 */
-	public function offsetUnset(mixed $offset): void
+	public function offsetUnset($offset)
 	{
 		if ($this->offsetExists($offset)) {
 			$this->totalCount--;

src/Content/Conversation.php

@@ -794,10 +794,7 @@ class Conversation
 			return [];
 		}
 
-		$blocked = $this->pConfig->get($this->session->getLocalUserId(), 'system', 'blocked');
-		if (!empty($blocked)) {
-			$str_blocked = str_replace(["\n", "\r"], ",", $blocked);
-		}
+		$str_blocked = str_replace(["\n", "\r"], ",", $this->pConfig->get($this->session->getLocalUserId(), 'system', 'blocked'));
 		if (empty($str_blocked)) {
 			return [];
 		}

src/Content/Nav.php

@@ -245,7 +245,7 @@ class Nav
 
 		$gdirpath = 'directory';
 
-		if (empty(DI::config()->get('system', 'singleuser'))) {
+		if (strlen(DI::config()->get('system', 'singleuser'))) {
 			$gdir = DI::config()->get('system', 'directory');
 			if (strlen($gdir)) {
 				$gdirpath = Profile::zrl($gdir, true);

src/Core/Session/Handler/Database.php

@@ -57,7 +57,7 @@ class Database extends AbstractSessionHandler
 		return true;
 	}
 
-	public function read($id): string|false
+	public function read($id)
 	{
 		if (empty($id)) {
 			return '';
@@ -136,7 +136,7 @@ class Database extends AbstractSessionHandler
 		}
 	}
 
-	public function gc($max_lifetime): int|false
+	public function gc($max_lifetime): bool
 	{
 		try {
 			return $this->dba->delete('session', ["`expire` < ?", time()]);

src/Database/Database.php

@@ -117,7 +117,7 @@ class Database
 			$port = trim($serverdata[1]);
 		}
 
-		if (!empty(trim((string) $this->configCache->get('database', 'port')))) {
+		if (!empty(trim($this->configCache->get('database', 'port')))) {
 			$port = trim($this->configCache->get('database', 'port'));
 		}
 

src/Model/Log/ParsedLogIterator.php

@@ -160,7 +160,7 @@ class ParsedLogIterator implements \Iterator
 	 * @see Iterator::next()
 	 * @return void
 	 */
-	public function next(): void
+	public function next()
 	{
 		$parsed = $this->read();
 
@@ -177,7 +177,7 @@ class ParsedLogIterator implements \Iterator
 	 * @see Iterator::rewind()
 	 * @return void
 	 */
-	public function rewind(): void
+	public function rewind()
 	{
 		$this->value = null;
 		$this->reader->rewind();
@@ -202,7 +202,7 @@ class ParsedLogIterator implements \Iterator
 	 * @see Iterator::current()
 	 * @return ?ParsedLogLing
 	 */
-	public function current(): mixed
+	public function current()
 	{
 		return $this->value;
 	}