some extra type checks

src/CallbackWrapper.php

@@ -58,7 +58,7 @@ class CallbackWrapper extends Wrapper {
 	 * @param callable|null $close (optional)
 	 * @param callable|null $readDir (optional)
 	 * @param callable|null $preClose (optional)
-	 * @return resource
+	 * @return resource|bool
 	 *
 	 */
 	public static function wrap($source, $read = null, $write = null, $close = null, $readDir = null, $preClose = null) {

src/CountWrapper.php

@@ -55,7 +55,7 @@ class CountWrapper extends Wrapper {
 	 *
 	 * @param resource $source
 	 * @param callable $callback
-	 * @return resource
+	 * @return resource|bool
 	 *
 	 * @throws \BadMethodCallException
 	 */

src/Directory.php

@@ -19,7 +19,7 @@ interface Directory {
 	public function dir_opendir($path, $options);
 
 	/**
-	 * @return string
+	 * @return string|bool
 	 */
 	public function dir_readdir();
 

src/DirectoryFilter.php

@@ -46,7 +46,7 @@ class DirectoryFilter extends DirectoryWrapper {
 	/**
 	 * @param resource $source
 	 * @param callable $filter
-	 * @return resource
+	 * @return resource|bool
 	 */
 	public static function wrap($source, callable $filter) {
 		return self::wrapSource($source, [

src/IteratorDirectory.php

@@ -61,7 +61,7 @@ class IteratorDirectory extends WrapperHandler implements Directory {
 	}
 
 	/**
-	 * @return string
+	 * @return string|bool
 	 */
 	public function dir_readdir() {
 		if ($this->iterator->valid()) {
@@ -92,7 +92,7 @@ class IteratorDirectory extends WrapperHandler implements Directory {
 	 * Creates a directory handle from the provided array or iterator
 	 *
 	 * @param \Iterator | array $source
-	 * @return resource
+	 * @return resource|bool
 	 *
 	 * @throws \BadMethodCallException
 	 */

src/SeekableWrapper.php

@@ -35,7 +35,11 @@ class SeekableWrapper extends Wrapper {
 
 	public function stream_open($path, $mode, $options, &$opened_path) {
 		$this->loadContext();
-		$this->cache = fopen('php://temp', 'w+');
+		$cache = fopen('php://temp', 'w+');
+		if ($cache === false) {
+			return false;
+		}
+		$this->cache = $cache;
 		return true;
 	}
 

src/UrlCallBack.php

@@ -47,7 +47,6 @@ class UrlCallback extends Wrapper implements Url {
 	 * @return \Icewind\Streams\Path
 	 *
 	 * @throws \BadMethodCallException
-	 * @throws \Exception
 	 */
 	public static function wrap($source, $fopen = null, $opendir = null, $mkdir = null, $rename = null, $rmdir = null,
 								$unlink = null, $stat = null) {
@@ -78,21 +77,29 @@ class UrlCallback extends Wrapper implements Url {
 	public function stream_open($path, $mode, $options, &$opened_path) {
 		$context = $this->loadUrlContext($path);
 		$this->callCallBack($context, 'fopen');
-		$this->setSourceStream(fopen($context['source'], $mode));
+		$source = fopen($context['source'], $mode);
+		if ($source === false) {
+			return false;
+		}
+		$this->setSourceStream($source);
 		return true;
 	}
 
 	public function dir_opendir($path, $options) {
 		$context = $this->loadUrlContext($path);
 		$this->callCallBack($context, 'opendir');
-		$this->setSourceStream(opendir($context['source']));
+		$source = opendir($context['source']);
+		if ($source === false) {
+			return false;
+		}
+		$this->setSourceStream($source);
 		return true;
 	}
 
 	public function mkdir($path, $mode, $options) {
 		$context = $this->loadUrlContext($path);
 		$this->callCallBack($context, 'mkdir');
-		return mkdir($context['source'], $mode, $options & STREAM_MKDIR_RECURSIVE);
+		return mkdir($context['source'], $mode, ($options & STREAM_MKDIR_RECURSIVE) > 0);
 	}
 
 	public function rmdir($path, $options) {

src/WrapperHandler.php

@@ -42,8 +42,8 @@ class WrapperHandler {
 	/**
 	 * @param resource|int $source
 	 * @param resource|array $context
-	 * @param null $protocol deprecated, protocol is now automatically generated
+	 * @param string|null $protocol deprecated, protocol is now automatically generated
-	 * @param null $class deprecated, class is now automatically generated
+	 * @param string|null $class deprecated, class is now automatically generated
 	 * @return bool|resource
 	 */
 	protected static function wrapSource($source, $context = [], $protocol = null, $class = null) {