🚿 examples cleanup

examples/imageWithText.php

@@ -3,18 +3,95 @@
  * example for additional text
  * @link https://github.com/chillerlan/php-qrcode/issues/35
  *
- * @filesource   imageWithText.php
  * @created      22.06.2019
  * @author       Smiley <smiley@chillerlan.net>
  * @copyright    2019 Smiley
  * @license      MIT
+ *
+ * @noinspection PhpComposerExtensionStubsInspection
  */
 
 use chillerlan\QRCode\{QRCode, QROptions};
+use chillerlan\QRCode\Output\QRImage;
 
 require_once __DIR__.'/../vendor/autoload.php';
 
-$data = 'https://www.youtube.com/watch?v=DLzxrzFCyOs&t=43s';
+class QRImageWithText extends QRImage{
+
+	/**
+	 * @param string|null $file
+	 * @param string|null $text
+	 *
+	 * @return string
+	 */
+	public function dump(string $file = null, string $text = null):string{
+		// set returnResource to true to skip further processing for now
+		$this->options->returnResource = true;
+
+		// there's no need to save the result of dump() into $this->image here
+		parent::dump($file);
+
+		// render text output if a string is given
+		if($text !== null){
+			$this->addText($text);
+		}
+
+		$imageData = $this->dumpImage();
+
+		if($file !== null){
+			$this->saveToFile($imageData, $file);
+		}
+
+		if($this->options->imageBase64){
+			$imageData = 'data:image/'.$this->options->outputType.';base64,'.base64_encode($imageData);
+		}
+
+		return $imageData;
+	}
+
+	/**
+	 * @param string $text
+	 */
+	protected function addText(string $text):void{
+		// save the qrcode image
+		$qrcode = $this->image;
+
+		// options things
+		$textSize  = 3; // see imagefontheight() and imagefontwidth()
+		$textBG    = [200, 200, 200];
+		$textColor = [50, 50, 50];
+
+		$bgWidth  = $this->length;
+		$bgHeight = $bgWidth + 20; // 20px extra space
+
+		// create a new image with additional space
+		$this->image = imagecreatetruecolor($bgWidth, $bgHeight);
+		$background  = imagecolorallocate($this->image, ...$textBG);
+
+		// allow transparency
+		if($this->options->imageTransparent && in_array($this->options->outputType, $this::TRANSPARENCY_TYPES, true)){
+			imagecolortransparent($this->image, $background);
+		}
+
+		// fill the background
+		imagefilledrectangle($this->image, 0, 0, $bgWidth, $bgHeight, $background);
+
+		// copy over the qrcode
+		imagecopymerge($this->image, $qrcode, 0, 0, 0, 0, $this->length, $this->length, 100);
+		imagedestroy($qrcode);
+
+		$fontColor = imagecolorallocate($this->image, ...$textColor);
+		$w         = imagefontwidth($textSize);
+		$x         = round(($bgWidth - strlen($text) * $w) / 2);
+
+		// loop through the string and draw the letters
+		foreach(str_split($text) as $i => $chr){
+			imagechar($this->image, $textSize, (int)($i * $w + $x), $this->length, $chr, $fontColor);
+		}
+	}
+
+}
+
 
 $options = new QROptions([
 	'version'      => 7,
@@ -23,9 +100,10 @@ $options = new QROptions([
 	'imageBase64'  => false,
 ]);
 
+
 header('Content-type: image/png');
 
-$qrOutputInterface = new QRImageWithText($options, (new QRCode($options))->getMatrix($data));
+$qrOutputInterface = new QRImageWithText($options, (new QRCode($options))->getMatrix('https://www.youtube.com/watch?v=dQw4w9WgXcQ'));
 
 // dump the output, with additional text
 echo $qrOutputInterface->dump(null, 'example text');