WordPress上传图片时手动给图片添加替代文本（Alt）和图像描述有些麻烦，可以通过本文的方法自动将图片名称设置为WordPress图像标题、说明和图像描述，如图：

将下面的代码添加到当前主题函数模板functions.php中：

1. add_action( 'add_attachment', 'my_set_image_meta_upon_image_upload' );
2. function my_set_image_meta_upon_image_upload( $post_ID ) {
3.  
4. // Check if uploaded file is an image, else do nothing
5.  
6. if ( wp_attachment_is_image( $post_ID ) ) {
7.  
8. $my_image_title = get_post( $post_ID )->post_title;
9.  
10. // Sanitize the title: remove hyphens, underscores & extra spaces:
11. $my_image_title = preg_replace( '%\s*[-_\s]+\s*%', ' ', $my_image_title );
12.  
13. // Sanitize the title: capitalize first letter of every word (other letters lower case):
14. $my_image_title = ucwords( strtolower( $my_image_title ) );
15.  
16. // Create an array with the image meta (Title, Caption, Description) to be updated
17. // Note: comment out the Excerpt/Caption or Content/Description lines if not needed
18. $my_image_meta = array(
19. 'ID' => $post_ID, // Specify the image (ID) to be updated
20. 'post_title' => $my_image_title, // Set image Title to sanitized title
21. 'post_excerpt' => $my_image_title, // Set image Caption (Excerpt) to sanitized title
22. 'post_content' => $my_image_title, // Set image Description (Content) to sanitized title
23. );
24.  
25. // Set the image Alt-Text
26. update_post_meta( $post_ID, '_wp_attachment_image_alt', $my_image_title );
27.  
28. // Set the image meta (e.g. Title, Excerpt, Content)
29. wp_update_post( $my_image_meta );
30.  
31. }
32. 代码可以过滤掉图片名称中的空格等多余元素，对之前上传的图片无效。

    代码源自：https://brutalbusiness.com/automatically-set-the-wordpress-image-title-alt-text-other-meta

33. }