A note from UrlEscape Function

UrlEscape is used to converts characters in a URL that might be altered during transport across the Internet ("unsafe" characters) into their corresponding escape sequences.

For the purposes of this document, a typical URL is divided into three sections: the server, the segment, and the query. For example:
http://microsoft.com/test.asp?url=/example/abc.asp?frame=true#fragment


The server portion is "http://microsoft.com/". The trailing forward slash is considered part of the server portion.

The segment portion is any part of the path found following the server portion, but before the first # or ? character, in this case simply "test.asp".

The query portion is the remainder of the path from the first # or ? character (inclusive) to the end. In the example, it is "?url=/example/abc.asp?frame=true#fragment".

Unsafe characters are those characters that might be altered during transport across the Internet. This function converts unsafe characters into their equivalent "%xy" escape sequences. The following table shows unsafe characters and their escape sequences.

Character Escape Sequence
^ 　　　　　　%5E
& 　　　　　　%26
` 　　　　　　%60
{ 　　　　　　%7B
} 　　　　　　%7D
| 　　　　　　%7C
] 　　　　　　%5D
[ 　　　　　　%5B
"　　　　　　 %22
<　　　　　　%3C
> 　　　　　  %3E
\ 　　　　　　%5C