Escapes a string for use in a URI.
Normally all characters that are not "unreserved" (i.e. ASCII alphanumerical characters plus dash, dot, underscore and tilde) are
escaped. But if you specify characters in reserved_chars_allowed
they are not escaped. This is useful for the "reserved"
characters in the URI specification, since those are allowed unescaped in some portions of a URI.
unescaped |
the unescaped input string. |
reserved_chars_allowed |
a string of reserved characters that are allowed to be used, or null. |
allow_utf8 |
true if the result can include UTF-8 characters. |
an escaped version of |