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

1. class codeImg
2. {
3. private $date,$img,$main,$width,$height,$target,$white;
4. public function constr($source)
5. {
6. $this->date = '' . date('Ymd') . '/';
7. $this->img = $this->date . md5($source) . '.jpg';
8. $this->main = imagecreatefromjpeg($source);
9. $this->width = imagesx($this->main);
10. $this->height = imagesy($this->main);
11. $this->target = imagecreatetruecolor($this->width, $this->height);
12. $this->white = imagecolorallocate($this->target, 255, 255, 255);
13. imagefill($this->target, 0, 0, $this->white);
14. imagecopyresampled($this->target, $this->main, 0, 0, 0, 0, $this->width, $this->height, $this->width, $this->height);
15. }
16. /**
17. * 生成二维码
18. * @param [type] $website [生成二维码地址]
19. * @param string $filename [生成二维路经名称]
20. * @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；]
21. * @param integer $size [控制生成图片的大小，默认为4]
22. * @param integer $margin [控制生成二维码的空白区域大小]
23. * @return [type] [description]
24. */
25. public function qrencode($website, $filename = false, $level = "L", $size = 4, $margin = 2)
26. {
27. include "./phpqrcode/qrlib.php";
28. QRcode::png($website, $filename, $level, $size, 2);
29. }
30. /**
31. * 把二维码图片生成到背景图片上及文字
32. * @param string $source 背景图片
33. * @param string $text1 文字描述
34. * @param string $child1 二维码图
35. * @param integer $textwidth 文字横向位置
36. * @param integer $textherght 文字高度
37. * @param integer $$fontSize 字体大小
38. * @param integer $cate1,$cate2,$cate3 颜色表
39. * @param string $font 文字字体
40. * @return [type] [description]
41. */
42. public function generateFont($source, $text1, $textwidth, $textherght, $fontSize = 18, $cate1 = 255, $cate2 = 250, $cate3 = 250, $font = './font/fangsong_GB2312.ttf')
43. {
44. $this->constr($source);
45. $fontColor = imagecolorallocate($this->target, $cate1, $cate2, $cate3); //字的RGB颜色
46. $fontBox = imagettfbbox($fontSize, 0, $font, $text1); //文字水平居中实质
47. imagettftext($this->target, $fontSize, 0, $textwidth, $textherght, $fontColor, $font, $text1);
48. $this->createImg();
49. return $this->img;
50. }
51. /**
52. * [generateImg description]
53. * @param string $source 背景图片
54. * @param string $codeurl 二维码图片
55. * @param integer $sourcewidth 二维码横向所在位置
56. * @param integer $sourceheight 二维码高度位置
57. * @param integer $codewidth 二维码宽度
58. * @param integer $codeheight 二维码高度
59. * @return [type] [description]
60. */
61. public function generateImg($source, $codeurl, $sourcewidth, $sourceheight, $codewidth = 100, $codeheight = 100)
62. {
63. $this->constr($source);
64. $child1 = imagecreatefrompng($codeurl);
65. $codewidth = $codewidth > 0 ? $codewidth :imagesx($child1);
66. $codeheight = $codeheight > 0 ? $codeheight : imagesy($child1);
67. imagecopyresampled($this->target, $child1, $sourcewidth, $sourceheight, 0, 0, $codewidth, $codeheight,imagesx($child1),imagesy($child1));
68. imagedestroy($child1);
69. $this->createImg();
70. return $this->img;
71. }
72. function createImg()
73. {
74. @mkdir('./' . $this->date);
75. imagejpeg($this->target, './' . $this->img, 95);
76. imagedestroy($this->main);
77. imagedestroy($this->target);
78. }
79. }
80. $source = "./img/1000.jpg";
81. $codeImg = new codeImg($source);
82. $website = "http://www.baidu.com";
83. $codeurl = "./temp/code.png";
84. $codeImg->qrencode($website, $codeurl);
85. #################################
86. $text = "开始了开始了hahhah呵呵";
87. $textwidth = 100;
88. $textherght = 50;
89. $generateFont = $codeImg->generateFont($source, $text, $textwidth, $textherght);
90. ##########################################################
91. $sourcewidth = 200;
92. $sourceheight = 150;
93. $generateImg = $codeImg->generateImg($generateFont, $codeurl, $sourcewidth, $sourceheight);
94. echo "<img src='" . $generateImg . "'>";
95. ``