批量将 WordPress 文章中的外链图片导入到本地

1. function ecp_save_post($post_id, $post) {
2. global $wpdb;
3. if($post->post_status == ‘publish’) {
4. $p = ‘/<img.*[\s]src=[\”|\’](.*)[\”|\’].*>/iU’;
5. $num = preg_match_all($p, $post->post_content, $matches);
6. if ($num) {
7. $wp_upload_dir = wp_upload_dir();
8. set_time_limit(0);
9. $ch = curl_init();
10. curl_setopt($ch, CURLOPT_HEADER, false);
11. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
12. curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
13. curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
14. curl_setopt($ch, CURLOPT_MAXREDIRS,20);
15. curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
16.  
17. $ecp_options = $_SERVER[‘HTTP_HOST’];
18. foreach ($matches[1] as $src) {
19. if (isset($src) && strpos($src, $ecp_options) === false) {
20. $file_info = wp_check_filetype(basename($src), null);
21. if ($file_info[‘ext’] == false) {
22. date_default_timezone_set(‘PRC’);
23. $file_name = date(‘YmdHis-‘).dechex(mt_rand(100000, 999999)).‘.tmp’;
24. } else {
25. $file_name = dechex(mt_rand(100000, 999999)) . ‘-‘ . basename($src);
26. }
27. curl_setopt($ch, CURLOPT_URL, $src);
28. $file_path = $wp_upload_dir[‘path’] . ‘/’ . $file_name;
29. $img = fopen($file_path, ‘wb’);
30. curl_setopt($ch, CURLOPT_FILE, $img);
31. $img_data = curl_exec($ch);
32. fclose($img);
33.  
34. if (file_exists($file_path) && filesize($file_path) > 0) {
35. $t = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
36. $arr = explode(‘/’, $t);
37. if (pathinfo($file_path, PATHINFO_EXTENSION) == ‘tmp’) {
38. $file_path = ecp_handle_ext($file_path, $arr[1], $wp_upload_dir[‘path’], $file_name, ‘tmp’);
39. } elseif (pathinfo($file_path, PATHINFO_EXTENSION) == ‘webp’) {
40. $file_path = ecp_handle_ext($file_path, $arr[1], $wp_upload_dir[‘path’], $file_name, ‘webp’);
41. }
42. $post->post_content = str_replace($src, $wp_upload_dir[‘url’] . ‘/’ . basename($file_path), $post->post_content);
43. $attachment = ecp_get_attachment_post(basename($file_path), $wp_upload_dir[‘url’] . ‘/’ . basename($file_path));
44. $attach_id = wp_insert_attachment($attachment, ltrim($wp_upload_dir[‘subdir’] . ‘/’ . basename($file_path), ‘/’), 0);
45. $attach_data = wp_generate_attachment_metadata($attach_id, $file_path);
46. $ss = wp_update_attachment_metadata($attach_id, $attach_data);
47. }
48. }
49. }
50. curl_close($ch);
51. $wpdb->update( $wpdb->posts, array(‘post_content’ => $post->post_content), array(‘ID’ => $post->ID));
52. }
53. }
54. }
55.  
56. function ecp_handle_ext($file, $type, $file_dir, $file_name, $ext) {
57. switch ($ext) {
58. case ‘tmp’:
59. if (rename($file, str_replace(‘tmp’, $type, $file))) {
60. if (‘webp’ == $type) {
61. return ecp_image_convert(‘webp’, ‘jpeg’, $file_dir . ‘/’ . str_replace(‘tmp’, $type, $file_name));
62. }
63. return $file_dir . ‘/’ . str_replace(‘tmp’, $type, $file_name);
64. }
65. case ‘webp’:
66. if (‘webp’ == $type) {
67. return ecp_image_convert(‘webp’, ‘jpeg’, $file);
68. } else {
69. if (rename($file, str_replace(‘webp’, $type, $file))) {
70. return $file_dir . ‘/’ . str_replace(‘webp’, $type, $file_name);
71. }
72. }
73. default:
74. return $file;
75. }
76. }
77.  
78. function ecp_image_convert($from=‘webp’, $to=‘jpeg’, $image) {
79. $im = imagecreatefromwebp($image);
80. if (imagejpeg($im, str_replace(‘webp’, ‘jpeg’, $image), 100)) {
81. try {
82. unlink($image);
83. } catch (Exception $e) {
84. $error_msg = sprintf(‘Error removing local file %s: %s’, $image,
85. $e->getMessage());
86. error_log($error_msg);
87. }
88. }
89. imagedestroy($im);
90.  
91. return str_replace(‘webp’, ‘jpeg’, $image);
92. }
93.  
94. function ecp_get_attachment_post($filename, $url) {
95. $file_info = wp_check_filetype($filename, null);
96. return array(
97. ‘guid’ => $url,
98. ‘post_type’ => ‘attachement’,
99. ‘post_mime_type’ => $file_info[‘type’],
100. ‘post_title’ => preg_replace(‘/\.[^.]+$/’, ”, $filename),
101. ‘post_content’ => ”,
102. ‘post_status’ => ‘inherit’
103. );
104. }
105. add_action(‘save_post’, ‘ecp_save_post’, 120, 2);

代码取自上述插件。