Unicode codepoint escape syntax

 Unicode codepoint escape syntax

 https://en.wikipedia.org/wiki/Percent-encoding

https://en.wikipedia.org/wiki/Category:Binary-to-text_encoding_formats 

https://en.wikipedia.org/wiki/Binary-to-text_encoding

https://stackoverflow.com/questions/31097636/how-do-i-convert-unicode-escape-sequences-to-text-in-php