American Cent Sign (¢) in Slugs/Permalinks Cannot be read by browser, forces 404 page

[beyondavatars]

So I am pretty tired of manually fixing this myself in the code every update so here is me contrubting finally to the community. :) I was going to make a pull request but you guys don't use github?!? No worries.

How to reproduce this:

1. Create a post with the title "Test ¢". FYI on Mac it is option + 4 to create that symbol.
2. Go to the post permalink.

Expected behavior: The page loads just fine.
Actual behavior: 404 because the browser can't interpret ¢ in the URL.

Code fix suggestion:

"¢" => ""

Just add it here: ​https://github.com/WordPress/WordPress/blob/master/wp-includes/formatting.php#L1616

Looking forward to the next release. :)

[Presskopp]

There are a lot more currency symbols, like Bengali Rupee Sign ৳ (U+09F3 ৳) or New Sheqel Sign ₪ (U+20AA ₪) and so on.

[Otto42]

Cent signs are allowed in URLs, and they work just fine in WordPress slugs.

Example:
​https://cloudup.com/cNWwTs1zGr5

You might need to escape them as %C2%A2, perhaps. But Chrome seems to have no issues with them as-is.

[codegeass]

Tested in 3 major browser and it seems Cent signs are working in three of them.

Chrome : 55.0.2883.95 (64-bit)
Firefox: 50.1.0
Safari : 9.1.1 (11601.6.17)

Could you please write down your version number for browser ?

best,