教你用php将二维码和文字结合到一个背景图片上！

将二维码生成到背景图片上，并且文字生成到背景图上，可以无限制扩增

1.生成前的图片

生成后的图片

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);
    	}
    	/**
	* 生成二维码
	* @param  [type]  $website  [生成二维码地址]
	* @param  string  $filename [生成二维路经名称]
	* @param  string  $level    [这个参数可传递的值分别是L(QR_ECLEVEL_L，7%)、M(QR_ECLEVEL_M，15%)、Q(QR_ECLEVEL_Q，25%)、H(QR_ECLEVEL_H，30%)，这个参数控制二维码容错率，不同的参数表示二维码可被覆盖的区域百分比，也就是被覆盖的区域还能识别；]
	* @param  integer $size[控制生成图片的大小，默认为4]
	* @param  integer $margin [控制生成二维码的空白区域大小]
	* @return [type]  [description]
	*/
	 public function qrencode($website, $filename = false, $level = "L", $size = 4, $margin = 2)
	 {
	 		include "./phpqrcode/qrlib.php";
   			QRcode::png($website, $filename, $level, $size, 2);
	 }
	 /**
	* 把二维码图片生成到背景图片上及文字
	* @param  string  $source 背景图片
	* @param  string  $text1  文字描述
	* @param  string  $child1 二维码图
	* @param  integer $textwidth   文字横向位置
	* @param  integer $textherght  文字高度
	* @param  integer $$fontSize   字体大小
	* @param  integer $cate1,$cate2,$cate3 颜色表
	* @param  string $font    文字字体
	* @return [type][description]
	*/
	public function generateFont($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颜色
   		$fontBox   = imagettfbbox($fontSize, 0, $font, $text1); //文字水平居中实质
   		imagettftext($this->target, $fontSize, 0, $textwidth, $textherght, $fontColor, $font, $text1);
   		$this->createImg();
   		return $this->img;
	}
	 /**
	* [generateImg description]
	* @param  string  $source   背景图片
	* @param  string  $codeurl  二维码图片
	* @param  integer  $sourcewidth  二维码横向所在位置
	* @param  integer  $sourceheight 二维码高度位置
	* @param  integer $codewidth    二维码宽度
	* @param  integer $codeheight   二维码高度
	* @return [type] [description]
	*/
	 public function generateImg($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://HdhCmsTestbaidu测试数据";
		$codeurl = "./temp/code.png";
		$codeImg->qrencode($website, $codeurl);
		#################################
		$text    = "开始了开始了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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