:octocat: mark nullable types explicitly (https://github.com/chillerlan/php-qrcode/issues/276)

examples/custom_output.php

@@ -48,7 +48,7 @@ class MyCustomOutput extends QROutputAbstract{
 	/**
 	 * @inheritDoc
 	 */
-	public function dump(string $file = null):string{
+	public function dump(string|null $file = null):string{
 		$output = '';
 
 		for($y = 0; $y < $this->moduleCount; $y++){

examples/imageWithLogo.php

@@ -30,7 +30,7 @@ class QRImageWithLogo extends QRGdImagePNG{
 	 * @return string
 	 * @throws \chillerlan\QRCode\Output\QRCodeOutputException
 	 */
-	public function dump(string $file = null, string $logo = null):string{
+	public function dump(string|null $file = null, string|null $logo = null):string{
 		// set returnResource to true to skip further processing for now
 		$this->options->returnResource = true;
 

examples/imageWithText.php

@@ -26,7 +26,7 @@ class QRImageWithText extends QRGdImagePNG{
 	/**
 	 * @inheritDoc
 	 */
-	public function dump(string $file = null, string $text = null):string{
+	public function dump(string|null $file = null, string|null $text = null):string{
 		// set returnResource to true to skip further processing for now
 		$this->options->returnResource = true;
 

examples/imagickConvertSVGtoPNG.php

@@ -47,7 +47,7 @@ class SVGConvert extends QRMarkupSVG{
 	}
 
 	/** @inheritDoc */
-	public function dump(string $file = null):string{
+	public function dump(string|null $file = null):string{
 		$base64 = $this->options->outputBase64;
 		// we don't want the SVG in base64
 		$this->options->outputBase64 = false;

examples/imagickWithLogo.php

@@ -28,7 +28,7 @@ class QRImagickWithLogo extends QRImagick{
 	 * @inheritDoc
 	 * @throws \chillerlan\QRCode\Output\QRCodeOutputException
 	 */
-	public function dump(string $file = null):string{
+	public function dump(string|null $file = null):string{
 		// set returnResource to true to skip further processing for now
 		$this->options->returnResource = true;