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Another invalid character question!
I'm trying to develop my own sitemap generator. If I have a ¼ (1 quarter) symbol in the URL to be generated, I need to convert the symbol to a URL friendly equivalent. Previously, the 3rd part sitemap generator converted this symbol to ¼ yet I can only convert to ¼ using htmlspecialchars/htmlentities which Google rejects.
Any idea how to convert to the correct format?