- Method percent_encode
string percent_encode(string s)
Encodes the given string using %XX encoding, except that URI unreserved chars are not encoded. The unreserved chars are A-Z, a-z, 0-9, -, ., _, and ~ (see RFC 2396 section 2.3).
8-bit chars are encoded straight, and wider chars are not allowed. That means this encoding is applicable if s is a binary octet string. If it is a character string then uri_encode should be used instead.
It is also slightly faster than uri_encode if s is known to contain only US-ASCII.