php gd库为页面添加水印实现代码

3. header ("content-type: image/png");

4. $conn = mysql_connect("localhost", "root", ""); //连接数据库
5. $colname_rs_article = $_get['id']; //获取参数id

6. mysql_select_db("cms", $conn); //执行sql

7. $query_rs_article = sprintf("select * from articles where article_id = %s", $colname_rs_article);
8. $rs_article = mysql_query($query_rs_article, $conn) or die(mysql_error());
9. $row_rs_article = mysql_fetch_assoc($rs_article);
10. $totalrows_rs_article = mysql_num_rows($rs_article);

11. //php gd库创建水印

12. $image = imagecreatetruecolor(700, 1000); //创建画布
13. $bg = imagecolorallocate($image, 255, 255, 255); //设置背景为白色
14. imagefill($image, 0, 0, $bg);
15. $text_color = imagecolorallocate($image, 0, 0, 0); //设置文字颜色为黑色
16. imagestring($image, 5, 0, 0, $row_rs_article['title'], $text_color); //输出文章标题
17. imagestring($image, 3, 0, 20, $row_rs_article['author'], $text_color); //输出文章作者
18. imagestring($image, 4, 0, 60, $row_rs_article['content'], $text_color); //输出文章内容
19. $logo = imagecreatefrompng('logo.png'); //获得水印图片
20. $logow = imagesx($logo);
21. $logoh = imagesy($logo);
22. imagecopy($image, $logo, 0, 0, 0, 0, $logow, $logoh); //合并文字图片与水印图片
23. imagejpeg($image); // output to browser
24. imagedestroy($logo);
25. imagedestroy($image);
26. ?>

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