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.\" ========================================================================
.\"
.IX Title "Mojo::Parameters 3"
.TH Mojo::Parameters 3 "2023-03-08" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Mojo::Parameters \- Parameters
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::Parameters;
\&
\&  # Parse
\&  my $params = Mojo::Parameters\->new(\*(Aqfoo=bar&baz=23\*(Aq);
\&  say $params\->param(\*(Aqbaz\*(Aq);
\&
\&  # Build
\&  my $params = Mojo::Parameters\->new(foo => \*(Aqbar\*(Aq, baz => 23);
\&  push @$params, i => \*(Aq♥ mojolicious\*(Aq;
\&  say "$params";
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::Parameters is a container for form parameters used by Mojo::URL, based on \s-1RFC
3986\s0 <https://tools.ietf.org/html/rfc3986> and the \s-1HTML\s0 Living Standard <https://html.spec.whatwg.org>.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojo::Parameters implements the following attributes.
.SS "charset"
.IX Subsection "charset"
.Vb 2
\&  my $charset = $params\->charset;
\&  $params     = $params\->charset(\*(AqUTF\-8\*(Aq);
.Ve
.PP
Charset used for encoding and decoding parameters, defaults to \f(CW\*(C`UTF\-8\*(C'\fR.
.PP
.Vb 2
\&  # Disable encoding and decoding
\&  $params\->charset(undef);
.Ve
.SH "METHODS"
.IX Header "METHODS"
Mojo::Parameters inherits all methods from Mojo::Base and implements the following new ones.
.SS "append"
.IX Subsection "append"
.Vb 4
\&  $params = $params\->append(foo => \*(Aqba&r\*(Aq);
\&  $params = $params\->append(foo => [\*(Aqba&r\*(Aq, \*(Aqbaz\*(Aq]);
\&  $params = $params\->append(foo => [\*(Aqbar\*(Aq, \*(Aqbaz\*(Aq], bar => 23);
\&  $params = $params\->append(Mojo::Parameters\->new);
.Ve
.PP
Append parameters. Note that this method will normalize the parameters.
.PP
.Vb 2
\&  # "foo=bar&foo=baz"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar\*(Aq)\->append(Mojo::Parameters\->new(\*(Aqfoo=baz\*(Aq));
\&
\&  # "foo=bar&foo=baz"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar\*(Aq)\->append(foo => \*(Aqbaz\*(Aq);
\&
\&  # "foo=bar&foo=baz&foo=yada"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar\*(Aq)\->append(foo => [\*(Aqbaz\*(Aq, \*(Aqyada\*(Aq]);
\&
\&  # "foo=bar&foo=baz&foo=yada&bar=23"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar\*(Aq)\->append(foo => [\*(Aqbaz\*(Aq, \*(Aqyada\*(Aq], bar => 23);
.Ve
.SS "clone"
.IX Subsection "clone"
.Vb 1
\&  my $params2 = $params\->clone;
.Ve
.PP
Return a new Mojo::Parameters object cloned from these parameters.
.SS "every_param"
.IX Subsection "every_param"
.Vb 1
\&  my $values = $params\->every_param(\*(Aqfoo\*(Aq);
.Ve
.PP
Similar to \*(L"param\*(R", but returns all values sharing the same name as an array reference. Note that this method will
normalize the parameters.
.PP
.Vb 2
\&  # Get first value
\&  say $params\->every_param(\*(Aqfoo\*(Aq)\->[0];
.Ve
.SS "merge"
.IX Subsection "merge"
.Vb 4
\&  $params = $params\->merge(foo => \*(Aqba&r\*(Aq);
\&  $params = $params\->merge(foo => [\*(Aqba&r\*(Aq, \*(Aqbaz\*(Aq]);
\&  $params = $params\->merge(foo => [\*(Aqbar\*(Aq, \*(Aqbaz\*(Aq], bar => 23);
\&  $params = $params\->merge(Mojo::Parameters\->new);
.Ve
.PP
Merge parameters. Note that this method will normalize the parameters.
.PP
.Vb 2
\&  # "foo=baz"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar\*(Aq)\->merge(Mojo::Parameters\->new(\*(Aqfoo=baz\*(Aq));
\&
\&  # "yada=yada&foo=baz"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar&yada=yada\*(Aq)\->merge(foo => \*(Aqbaz\*(Aq);
\&
\&  # "yada=yada"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar&yada=yada\*(Aq)\->merge(foo => undef);
.Ve
.SS "names"
.IX Subsection "names"
.Vb 1
\&  my $names = $params\->names;
.Ve
.PP
Return an array reference with all parameter names.
.PP
.Vb 2
\&  # Names of all parameters
\&  say for @{$params\->names};
.Ve
.SS "new"
.IX Subsection "new"
.Vb 5
\&  my $params = Mojo::Parameters\->new;
\&  my $params = Mojo::Parameters\->new(\*(Aqfoo=b%3Bar&baz=23\*(Aq);
\&  my $params = Mojo::Parameters\->new(foo => \*(Aqb&ar\*(Aq);
\&  my $params = Mojo::Parameters\->new(foo => [\*(Aqba&r\*(Aq, \*(Aqbaz\*(Aq]);
\&  my $params = Mojo::Parameters\->new(foo => [\*(Aqbar\*(Aq, \*(Aqbaz\*(Aq], bar => 23);
.Ve
.PP
Construct a new Mojo::Parameters object and \*(L"parse\*(R" parameters if necessary.
.SS "pairs"
.IX Subsection "pairs"
.Vb 2
\&  my $array = $params\->pairs;
\&  $params   = $params\->pairs([foo => \*(Aqb&ar\*(Aq, baz => 23]);
.Ve
.PP
Parsed parameter pairs. Note that this method will normalize the parameters.
.PP
.Vb 2
\&  # Remove all parameters
\&  $params\->pairs([]);
.Ve
.SS "param"
.IX Subsection "param"
.Vb 4
\&  my $value = $params\->param(\*(Aqfoo\*(Aq);
\&  $params   = $params\->param(foo => \*(Aqba&r\*(Aq);
\&  $params   = $params\->param(foo => qw(ba&r baz));
\&  $params   = $params\->param(foo => [\*(Aqba;r\*(Aq, \*(Aqbaz\*(Aq]);
.Ve
.PP
Access parameter values. If there are multiple values sharing the same name, and you want to access more than just the
last one, you can use \*(L"every_param\*(R". Note that this method will normalize the parameters.
.SS "parse"
.IX Subsection "parse"
.Vb 1
\&  $params = $params\->parse(\*(Aqfoo=b%3Bar&baz=23\*(Aq);
.Ve
.PP
Parse parameters.
.SS "remove"
.IX Subsection "remove"
.Vb 1
\&  $params = $params\->remove(\*(Aqfoo\*(Aq);
.Ve
.PP
Remove parameters. Note that this method will normalize the parameters.
.PP
.Vb 2
\&  # "bar=yada"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar&foo=baz&bar=yada\*(Aq)\->remove(\*(Aqfoo\*(Aq);
.Ve
.SS "to_hash"
.IX Subsection "to_hash"
.Vb 1
\&  my $hash = $params\->to_hash;
.Ve
.PP
Turn parameters into a hash reference. Note that this method will normalize the parameters.
.PP
.Vb 2
\&  # "baz"
\&  Mojo::Parameters\->new(\*(Aqfoo=bar&foo=baz\*(Aq)\->to_hash\->{foo}[1];
.Ve
.SS "to_string"
.IX Subsection "to_string"
.Vb 1
\&  my $str = $params\->to_string;
.Ve
.PP
Turn parameters into a string.
.PP
.Vb 2
\&  # "foo=bar&baz=23"
\&  Mojo::Parameters\->new\->pairs([foo => \*(Aqbar\*(Aq, baz => 23])\->to_string;
.Ve
.SH "OPERATORS"
.IX Header "OPERATORS"
Mojo::Parameters overloads the following operators.
.SS "array"
.IX Subsection "array"
.Vb 1
\&  my @pairs = @$params;
.Ve
.PP
Alias for \*(L"pairs\*(R". Note that this will normalize the parameters.
.PP
.Vb 2
\&  say $params\->[0];
\&  say for @$params;
.Ve
.SS "bool"
.IX Subsection "bool"
.Vb 1
\&  my $bool = !!$params;
.Ve
.PP
Always true.
.SS "stringify"
.IX Subsection "stringify"
.Vb 1
\&  my $str = "$params";
.Ve
.PP
Alias for \*(L"to_string\*(R".
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.