教你用php將二維條碼和文字結合到一個背景圖片上！

將二維條碼生成到背景圖片上，並且文字生成到背景圖上，可以無限制擴增

1.生成前的圖片

生成後的圖片

class codeImg
{
	private $date,$img,$main,$width,$height,$target,$white;
    	public function constr($source)
    	{
    		$this->date   = '' . date('Ymd') . '/';
	        $this->img    = $this->date . md5($source) . '.jpg';
	        $this->main   = imagecreatefromjpeg($source);
	        $this->width  = imagesx($this->main);
	        $this->height = imagesy($this->main);
	        $this->target = imagecreatetruecolor($this->width, $this->height);
	        $this->white  = imagecolorallocate($this->target, 255, 255, 255);
        		imagefill($this->target, 0, 0, $this->white);
        		imagecopyresampled($this->target, $this->main, 0, 0, 0, 0, $this->width, $this->height, $this->width, $this->height);
    	}
    	/**
	     * 生成二維條碼
	     * @param  [type]  $website  [生成二維條碼地址]
	     * @param  string  $filename [生成二維路經名稱]
	     * @param  string  $level    [這個引數可傳遞的值分別是L(QR_ECLEVEL_L，7%)、M(QR_ECLEVEL_M，15%)、Q(QR_ECLEVEL_Q，25%)、H(QR_ECLEVEL_H，30%)，這個引數控制二維條碼容錯率，不同的參數列示二維條碼可被覆蓋的區域百分比，也就是被覆蓋的區域還能識別；]
	     * @param  integer $size     [控制生成圖片的大小，預設為4]
	     * @param  integer $margin [控制生成二維條碼的空白區域大小]
	     * @return [type]            [description]
	     */
	      public function qrencode($website, $filename = false, $level = "L", $size = 4, $margin = 2)
	      {
	      		include "./phpqrcode/qrlib.php";
        			QRcode::png($website, $filename, $level, $size, 2);
	      }
	      /**
	     * 把二維條碼圖片生成到背景圖片上及文字
	     * @param  string  $source      背景圖片
	     * @param  string  $text1       文字描述
	     * @param  string  $child1      二維條碼圖
	     * @param  integer $textwidth   文字橫向位置
	     * @param  integer $textherght  文字高度
	     * @param  integer $$fontSize   字型大小
	     * @param  integer $cate1,$cate2,$cate3 顏色表
	     * @param  string $font         文字字型
	     * @return [type]               [description]
	     */
	     public function generateFont($source, $text1, $textwidth, $textherght, $fontSize = 18, $cate1 = 255, $cate2 = 250, $cate3 = 250, $font = './font/fangsong_GB2312.ttf')
	     {
	     	$this->constr($source);
        		$fontColor = imagecolorallocate($this->target, $cate1, $cate2, $cate3); //字的RGB顏色
        		$fontBox   = imagettfbbox($fontSize, 0, $font, $text1); //文字水平居中實質
        		imagettftext($this->target, $fontSize, 0, $textwidth, $textherght, $fontColor, $font, $text1);
        		$this->createImg();
        		return $this->img;
	     }
	      /**
	     * [generateImg description]
	     * @param  string  $source        背景圖片
	     * @param  string  $codeurl       二維條碼圖片
	     * @param  integer  $sourcewidth  二維條碼橫向所在位置
	     * @param  integer  $sourceheight 二維條碼高度位置
	     * @param  integer $codewidth    二維條碼寬度
	     * @param  integer $codeheight   二維條碼高度
	     * @return [type]                [description]
	     */
	      public function generateImg($source, $codeurl, $sourcewidth, $sourceheight, $codewidth = 100, $codeheight = 100)
	      {
			$this->constr($source);
        			$child1 = imagecreatefrompng($codeurl);
        			$codewidth = $codewidth > 0 ? $codewidth :imagesx($child1);
        			$codeheight = $codeheight > 0 ? $codeheight : imagesy($child1);
        			imagecopyresampled($this->target, $child1, $sourcewidth, $sourceheight, 0, 0, $codewidth, $codeheight,imagesx($child1),imagesy($child1));
        			imagedestroy($child1);
        			$this->createImg();
        			return $this->img;
		}
		function createImg()
		{
			@mkdir('./' . $this->date);
       			 imagejpeg($this->target, './' . $this->img, 95);
        			imagedestroy($this->main);
        			imagedestroy($this->target);
		}
	}
		$source       = "./img/1000.jpg";
		$codeImg = new codeImg($source);
		$website = "http://www.baidu.com";
		$codeurl = "./temp/code.png";
		$codeImg->qrencode($website, $codeurl);
		#################################
		$text         = "開始了開始了hahhah呵呵";
		$textwidth    = 100;
		$textherght   = 50;
		$generateFont = $codeImg->generateFont($source, $text, $textwidth, $textherght);
		##########################################################
		$sourcewidth  = 200;
		$sourceheight = 150;
		$generateImg  = $codeImg->generateImg($generateFont, $codeurl, $sourcewidth, $sourceheight);
		echo "<img src='" . $generateImg . "'>";
	
	``		

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