NAME
    URL::Encode - Encoding and decoding of
    "application/x-www-form-urlencoded" encoding.

SYNOPSIS
        $octets = url_decode($octets);
        $string = url_decode_utf8($octets);
    
        $octets = url_encode($octets);
        $octets = url_encode_utf8($string);
    
        $params = url_params_flat($octets [, $utf8 = false]);
        $params = url_params_mixed($octets [, $utf8 = false]);
        $params = url_params_multi($octets [, $utf8 = false]);
                  url_params_each($octets, $callback [, $utf8 = false]);

DESCRIPTION
    This module provides functions to encode and decode strings into and
    from the "application/x-www-form-urlencoded" encoding.

    The "application/x-www-form-urlencoded" format encodes a ordered data
    sets of pairs consisting of a name and a value, with pairs seperated by
    ampersand and names and values seperated by the equal sign. Space
    characters are replaced with plus sign and any characters not in the
    unreserved character set is encoded using the percent-encoding scheme
    also used for resource identifiers. A percent-encoded octet is encoded
    as a character triplet, consisting of the percent character "%" followed
    by the two hexadecimal digits representing that octet's numeric value.

    The unreserved character set includes the uppercase and lowercase
    letters, decimal digits, hyphen, period, underscore, and tilde.

        ABCDEFGHIJKLMNOPQRSTUVWXYZ
        abcdefghijklmnopqrstuvwxyz
        0123456789
        - . _ ~

FUNCTIONS
  url_decode
        $octets = url_decode($octets);

    Returns a decoded representation of the given URL-encoded $octets as an
    octet string.

  url_decode_utf8
        $string = url_decode_utf8($octets);

    Returns a decoded representation of the given URL-encoded $octets in
    UTF-8 encoding as a character string.

  url_encode
        $octets = url_encode($octets);

    Returns a URL-encoded representation of the given $octets as an octet
    string.

  url_encode_utf8
        $octets = url_encode_utf8($string);

    Returns a URL-encoded representation of $string in UTF-8 encoding as an
    octet string.

  url_params_flat
        $params = url_params_flat($octets);
        $params = url_params_flat($octets, $utf8);

    Parses a URL-encoded form data sets of name/value pairs from the given
    octets. Returns an ARRAY reference containing the URL-decoded name/value
    pairs in order.

        $params = url_params_flat('foo=A&foo=B&bar=C');
        $params; # [ foo => 'A', foo => 'B', bar => 'C' ]

  url_params_mixed
        $params = url_params_mixed($octets);
        $params = url_params_mixed($octets, $utf8);

    Parses a URL-encoded form data sets of name/value pairs from the given
    octets. Returns a HASH reference containing the URL-decoded name/value
    pairs. Multiple occurrences of a parameter will result in an ARRAY
    reference holding all the values for that parameter in order.

        $params = url_params_mixed('foo=A&foo=B&bar=C');
        $params; # { foo => [ 'A', 'B' ], bar => 'C' }

  url_params_multi
        $params = url_params_multi($octets);
        $params = url_params_multi($octets, $utf8);

    Parses a URL-encoded form data sets of name/value pairs from the given
    octets. Returns a HASH reference containing the URL-decoded name/value
    pairs. Values are stored in an ARRAY reference.

        $params = url_params_multi('foo=A&foo=B&bar=C');
        $params; # { foo => [ 'A', 'B' ], bar => [ 'C' ] }

  url_params_each
        url_params_each($octets, $callback);
        url_params_each($octets, $callback, $utf8);

    Parses a URL-encoded form data sets of name/value pairs from the given
    octets. Invokes the given callback for each URL-decoded name/value pair.

        $callback = sub {
            my ($name, $value) = @_;
        };
    
        url_params_each($octets, $callback);

EXPORTS
    None by default. All functions can be exported using the ":all" tag or
    individually.

DIAGNOSTICS
    (F) Usage: %s
        Subroutine called with wrong number of arguments.

    (F) Wide character in octet string
    (F) Malformed UTF-8 in URL-decoded octets

PERFORMANCE
    The URL::Encode::XS module provides faster C/XS implementations of the
    functions found in this module. This module will automatically use
    URL::Encode::XS if it's installed.

        Benchmarking url_decode() PP vs XS:

                Rate    PP    XS
        PP  507520/s    --  -92%
        XS 6389812/s 1159%    --

        Benchmarking url_encode() PP vs XS:

                Rate    PP    XS
        PP  119866/s    --  -98%
        XS 7214089/s 5918%    --

        Benchmarking url_params_mixed() PP vs XS:

              Rate    PP    XS
        PP  4450/s    --  -95%
        XS 95015/s 2035%    --

        Benchmarking URL::Encode::XS vs CGI::Deurl::XS

                           Rate  CGI::Deurl::XS URL::Encode::XS
        CGI::Deurl::XS  51932/s              --            -48%
        URL::Encode::XS 99444/s             91%              --

SEE ALSO
    URL::Encode::XS
        XS implementation of "URL::Encode".

    CGI::Deurl::XS

SUPPORT
  BUGS
    Please report any bugs by email to "bug-url-encode at rt.cpan.org", or
    through the web interface at
    <http://rt.cpan.org/Public/Dist/Display.html?Name=URL-Encode>. You will
    be automatically notified of any progress on the request by the system.

  SOURCE CODE
    This is open source software. The code repository is available for
    public review and contribution under the terms of the license.

    <http://github.com/chansen/p5-url-encode>

        git clone http://github.com/chansen/p5-url-encode

AUTHOR
    Christian Hansen "chansen@cpan.org"

COPYRIGHT
    Copyright 2011-2013 by Christian Hansen.

    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.