自从9.1.2起，在已上传的文件中，WordPress似乎用破折号替换了所有下划线。 我该如何删除？

Question

I have noticed that it seems like that Wordpress is replacing all underscores with dashes in uploaded file names since the lastest update (9.1.2). However, I need the underscores in the file names to be kept.

I found a plugin that I modified but it doesn't seem to help.. See the code below.

function mfl_make_filename_lowercase($filename) {
    $info = pathinfo($filename);
    $ext  = empty($info['extension']) ? '' : '.' . $info['extension'];
    $name = basename($filename, $ext);
    $name = preg_replace('/-/', '_', $name);
    return strtolower($name) . $ext;
}
add_filter('sanitize_file_name', 'mfl_make_filename_lowercase', 10);

I have looked around quite a bit, I have checked the formatting.php in wp-includes and changed the preg_replace to '_' instead of '-' where I found it. I have done the same in files.php in wp-admin/includes.

I must be missing something. Or is it simply not possible? Please help!

Answer 1

Google treats - as word separator, but not _. Here is an article that explains it.

But if you still looking for a solution here is the answer

check out wp-includes/formatting.php

on line 1241 you will get sanitize_title_with_dashes function find

$title = strtolower($title);
$title = preg_replace('/&.+?;/', '', $title); // kill entities
$title = str_replace('.', '-', $title);
$title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
$title = preg_replace('/\s+/', '-', $title);
$title = preg_replace('|-+|', '-', $title);
$title = trim($title, '-');

swap out the dashes by underscore

Note that any posts you've created before this change, and rely on the %postname% permalink structure tag, will be broken.

In that case you'll need to go back and republish those post so the dashes are swapped out for the underscores. Or just write yourself a little SQL to replace them.