前些日子把phpcms的内置编辑器改成了百度UE编辑器，非常好用，但是有个地方不是很满意，就是没法给上传的图片加水印了，经过一番研究终于实现了出来，分享给大家。

UEditor编辑器上传图片是自动提取的，但是图片没有水印功能，下面小编和各位一起来看看。

UEditor编辑器没有上传图片加水印的功能，需要进行二次开发，本例是在PHPCMS系统中对百度编辑器进行二次开发，添加上传图片加水印功能。

首先打开UEditor编辑器文件目录的php文件夹，打开Uploader.class.php，把PHPCMS添加水印的方法复制过来，加到这个类所有成员方法最后面，然后进行修改如下：

1. //图片加水印
2. public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = '99danji',$w_font = 8, $w_color = '#ff0000') {
3. $this->w_img = 'watermark.png';
4. $this->w_pos = 9;
5. $this->w_minwidth = 400;
6. $this->w_minheight = 200;
7. $this->w_quality = 80;
8. $this->w_pct = 85;
9. $w_pos = $w_pos ? $w_pos : $this->w_pos;
10. $w_img = $w_img ? $w_img : $this->w_img;
11. //if(!$this->watermark_enable || !$this->check($source)) return false;
12. if(!$target) $target = $source;
13. //$w_img = PHPCMS_PATH.$w_img;
14. //define('WWW_PATH', dirname(dirname(dirname(__FILE__)));
15. $w_img = '../../../images/water/'.$w_img;
16. $source_info = getimagesize($source);
17. $source_w = $source_info[0];
18. $source_h = $source_info[1];
19. //if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false;
20. switch($source_info[2]) {
21. case 1 :
22. $source_img = imagecreatefromgif($source);
23. break;
24. case 2 :
25. $source_img = imagecreatefromjpeg($source);
26. break;
27. case 3 :
28. $source_img = imagecreatefrompng($source);
29. break;
30. default :
31. return false;
32. }
33. if(!emptyempty($w_img) && file_exists($w_img)) {
34. $ifwaterimage = 1;
35. $water_info = getimagesize($w_img);
36. $width = $water_info[0];
37. $height = $water_info[1];
38. switch($water_info[2]) {
39. case 1 :
40. $water_img = imagecreatefromgif($w_img);
41. break;
42. case 2 :
43. $water_img = imagecreatefromjpeg($w_img);
44. break;
45. case 3 :
46. $water_img = imagecreatefrompng($w_img);
47. break;
48. default :
49. return;
50. }
51. } else {
52. $ifwaterimage = 0;
53. $temp = imagettfbbox(ceil($w_font*2.5), 0, PC_PATH.'libs/data/font/elephant.ttf', $w_text);
54. $width = $temp[2] - $temp[6];
55. $height = $temp[3] - $temp[7];
56. unset($temp);
57. }
58. switch($w_pos) {
59. case 1:
60. $wx = 5;
61. $wy = 5;
62. break;
63. case 2:
64. $wx = ($source_w - $width) / 2;
65. $wy = 0;
66. break;
67. case 3:
68. $wx = $source_w - $width;
69. $wy = 0;
70. break;
71. case 4:
72. $wx = 0;
73. $wy = ($source_h - $height) / 2;
74. break;
75. case 5:
76. $wx = ($source_w - $width) / 2;
77. $wy = ($source_h - $height) / 2;
78. break;
79. case 6:
80. $wx = $source_w - $width;
81. $wy = ($source_h - $height) / 2;
82. break;
83. case 7:
84. $wx = 0;
85. $wy = $source_h - $height;
86. break;
87. case 8:
88. $wx = ($source_w - $width) / 2;
89. $wy = $source_h - $height;
90. break;
91. case 9:
92. $wx = $source_w - $width;
93. $wy = $source_h - $height;
94. break;
95. case 10:
96. $wx = rand(0,($source_w - $width));
97. $wy = rand(0,($source_h - $height));
98. break;
99. default:
100. $wx = rand(0,($source_w - $width));
101. $wy = rand(0,($source_h - $height));
102. break;
103. }
104. if($ifwaterimage) {
105. if($water_info[2] == 3) {
106. imagecopy($source_img, $water_img, $wx, $wy, 0, 0, $width, $height);
107. } else {
108. imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
109. }
110. } else {
111. if(!emptyempty($w_color) && (strlen($w_color)==7)) {
112. $r = hexdec(substr($w_color,1,2));
113. $g = hexdec(substr($w_color,3,2));
114. $b = hexdec(substr($w_color,5));
115. } else {
116. return;
117. }
118. imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));
119. }
120. switch($source_info[2]) {
121. case 1 :
122. imagegif($source_img, $target);
123. break;
124. case 2 :
125. imagejpeg($source_img, $target, $this->w_quality);
126. break;
127. case 3 :
128. imagepng($source_img, $target);
129. break;
130. default :
131. return;
132. }
133. if(isset($water_info)) {
134. unset($water_info);
135. }
136. if(isset($water_img)) {
137. imagedestroy($water_img);
138. }
139. unset($source_info);
140. imagedestroy($source_img);
141. return true;
142. }
143. public function check($image) {
144. return extension_loaded('gd') && preg_match("/\.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));
145. }

对比我修改的部分，由于phpcms水印可以在后台管理设置，phpcms自带的水印方法通过读取配置文件获取路径，和读取数据库设置获取参数设置，那么这些地方需要手动进行设置。

对了，在upFile方法还要添加一段函数：

1. if ($this->watermark) {
2. $this->watermark($this->filePath,$this->filePath);
3. }

然后打开UEditor百度编辑器php目录下的action_upload.php文件，加上是否添加水印的参数：

1. /* 上传配置 */
2. $base64 = "upload";
3. switch (htmlspecialchars($_GET['action'])) {
4. case 'uploadimage':
5. $config = array(
6. "pathFormat" => $CONFIG['imagePathFormat'],
7. "maxSize" => $CONFIG['imageMaxSize'],
8. "allowFiles" => $CONFIG['imageAllowFiles']
9. );
10. $fieldName = $CONFIG['imageFieldName'];
11. $watermark = true;
12. break;

然后在后面还有一句要改成：

1. /* 生成上传实例对象并完成上传 */
2. $up = new Uploader($fieldName, $config, $base64, $watermark);

这样就大功告成了，本文主要是提供思路和参考。