PHP查看邮件是否已被阅读

当你在发送邮件时，你或许很想知道该邮件是否被对方已阅读。这里有段非常有趣的代码片段能够显示对方IP地址记录阅读的实际日期和时间。

2. error_reporting(0);
3. Header("Content-Type: image/jpeg");
5. //Get IP
6. if (!emptyempty($_SERVER['HTTP_CLIENT_IP']))
7. {
8. $ip=$_SERVER['HTTP_CLIENT_IP'];
9. }
10. elseif (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR']))
11. {
12. $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
13. }
14. else
15. {
16. $ip=$_SERVER['REMOTE_ADDR'];
17. }
19. //Time
20. $actual_time = time();
21. $actual_day = date('Y.m.d', $actual_time);
22. $actual_day_chart = date('d/m/y', $actual_time);
23. $actual_hour = date('H:i:s', $actual_time);
25. //GET Browser
26. $browser = $_SERVER['HTTP_USER_AGENT'];
28. //LOG
29. $myFile = "log.txt";
30. $fh = fopen($myFile, 'a+');
31. $stringData = $actual_day . ' ' . $actual_hour . ' ' . $ip . ' ' . $browser . ' ' . "\r\n";
32. fwrite($fh, $stringData);
33. fclose($fh);
35. //Generate Image (Es. dimesion is 1x1)
36. $newimage = ImageCreate(1,1);
37. $grigio = ImageColorAllocate($newimage,255,255,255);
38. ImageJPEG($newimage);
39. ImageDestroy($newimage);
41. ?>

PHP如何发送邮件