缓存文件夹是ABSPATH . ‘avatar/’

function.php

1. <?php
2.  
3. //首先要创建一个缓存文件夹ABSPATH . ‘avatar/’
4. //
5. function my_get_avatar($avatar, $id_or_email, $size) {
7. // Get the author’s email.
8. $email = ”;
9. if ( is_numeric($id_or_email) ) {
10. $id = (int) $id_or_email;
11. $user = get_userdata($id);
12. if ( $user )
13. $email = $user->user_email;
14. } elseif ( is_object($id_or_email) ) {
15. if ( !empty($id_or_email->user_id) ) {
16. $id = (int) $id_or_email->user_id;
17. $user = get_userdata($id);
18. if ( $user)
19. $email = $user->user_email;
20. } elseif ( !empty($id_or_email->comment_author_email) ) {
21. $email = $id_or_email->comment_author_email;
22. }
23. } else {
24. $email = $id_or_email;
25. }
27. // Get the url of avatar
28. $pattern = ‘/(?=http)[-\w:\/\.?&#;=]+/’;
29. $url_count = preg_match_all($pattern, $avatar, $original_avatar_url);
30. $avatar_size = array();
31. $avatar_url = array();
32. $pattern = ‘/(?<=s=)\d+/’;
33. for ( $i = 0; $i < $url_count; ++$i) {
34. preg_match($pattern, $original_avatar_url[0][$i], $size_array);
35. $avatar_url[$i] = $original_avatar_url[0][$i];
36. $avatar_size[$i] = $size_array[0];
37. }
39. // Check if the author has a gravatar.
40. $hashkey = md5(strtolower(trim($email)));
41. $test_url = ‘http://www.gravatar.com/avatar/’ . $hashkey . ‘?d=404’;
42. $data = wp_cache_get($hashkey);
43. if ( false === $data ) {
44. $response = wp_remote_head($test_url);
45. if( is_wp_error($response) ) {
46. $data = ‘not200’;
47. } else {
48. $data = $response[‘response’][‘code’];
49. }
50. wp_cache_set($hashkey, $data, $group = ”, $expire = 60*5);
51. }
53. if ( $data != ‘200’ ) {
54. // The author doesn’t have a gravatar.
55. if ( stripos($email,“@qq.com”) ) {
56. // If he uses QQ mail, let WordPress use his QQ avatar instead.
57. // Set the size of QQ avatar.
58. for ( $i = 0; $i < $url_count; ++$i) {
59. if ( $avatar_size[$i] <= 100 ) $qq_avatar_size = 100;
60. elseif ( $size <= 140 ) $qq_avatar_size = 140;
61. elseif ( $size <= 240 ) $qq_avatar_size = 240;
62. else $qq_avatar_size = 640;
63. // q1.qlogo.cn, q3.qlogo.cn, q4.qlogo.cn also work.
64. $avatar_url[$i] = ‘http://q2.qlogo.cn/g?b=qq&nk=’ . $email . ‘&s=’ . $qq_avatar_size;
65. }
66. }
67. }
68.  
69. // Unfortunately I don’t know what encrypt method the QQ avatar interface accepts.
70. // So to protect the author’s privacy, I have to cache the avatars.
71. $wp_url = get_bloginfo(‘wpurl’);
72. // Caching.
73. for ( $i = 0; $i < $url_count; ++$i) {
74. $file_path = ABSPATH . ‘avatar/’ . $hashkey . ‘-‘ . $avatar_size[$i] . ‘.jpg’;
75. // 1209600s = 14d, the avatars will be cached for 2 weeks. You can change the period.
76. $lifetime = 1209600;
77. if ( !is_file($file_path) || (time() – filemtime($file_path) ) > $lifetime) {
78. // If the file doesn’t exist or it has been out of date, then update it.
79. // It’s necessary to use “-N –no-use-server-timestamps”.
80. exec(“wget -N –no-use-server-timestamps -O ‘” . $file_path . “‘ ‘” . $avatar_url[$i] . “‘ > /dev/null &”);
81. }
82. else $avatar = str_replace($original_avatar_url[0][$i], $wp_url . ‘/avatar/’ . $hashkey . ‘-‘ . $avatar_size[$i] . ‘.jpg’, $avatar);
83. if ( filesize($file_path) < 500 ) copy($wp_url . ‘/avatar/default.jpg’, $file_path);
84. }
85. return $avatar;
86. }
87. add_filter( ‘get_avatar’, ‘my_get_avatar’, 10, 3);
88.  
89. ?>