| HTML escape | URL escape | URL parameter escape | |
|---|---|---|---|
| Perl core | CGI::escapeHTML() | CGI::Util::escape() | CGI::Util::simple_escape() |
| Perl + LWP | URI::Escape | ||
| Perl + Plack | Plack::Util::encode_html() | URI::Escape | |
| Perl + Dancer | Dancer::Error::_html_encode() | ||
| PHP | htmlentities() | urlencode() | ? |
| Javascript | 3rd-party function needed | encodeURI() | encodeURIComponent() |