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form()

form()

Twig Function

Functions prefixed with form_ perform tasks that are useful when dealing with forms. The helper maps directly to the Form PHP class and its methods. For example:

{{ form_close() }}

The above is the PHP equivalent of the following:

<?= Form::close() ?>

Note: Methods in camelCase should be converted to snake_case.

# form_open()

Outputs a standard <form> opening tag along with the _session_key and _token hidden fields for CSRF protection. If you are using the AJAX Framework, it is recommended that you use form_ajax() instead.

{{ form_open() }}

Attributes can be passed in the first argument.

{{ form_open({ class: 'form-horizontal' }) }}

The above example would output as the following:

<form class="form-horizontal">

There are some special options that can also be used alongside the attributes.

{{ form_open({ request: 'onUpdate' }) }}

The function support the following options:

Option Description
method Request method. Corresponds to the method FORM tag attribute. Eg: POST, GET, PUT, DELETE
request A handler name to execute on the server when the form is posted. See the AJAX handlers article for details about event handlers.
url Specifies URL to post the form to. Corresponds to the action FORM tag attribute.
files Determines whether the form will submit files. Accepted values: true and false.
model A model object for the form model binding.

# form_ajax()

Outputs an AJAX enabled FORM opening tag. The first parameter of the form_ajax() function is the AJAX handler name. The handler can be defined in the layout or page PHP section code, it can also be defined in a component. You may find more information about AJAX in the AJAX Framework article.

{{ form_ajax('onUpdate') }}

Attributes can be passed in the second argument.

{{ form_ajax('onSave', { class: 'form-horizontal'}) }}

The above example would output as the following:

<form data-request="onSave" class="form-horizontal">

There are some special options that can also be used alongside the attributes.

{{ form_ajax('onDelete', { data: { id: 2 }, confirm: 'Really delete this record?' }) }}

{{ form_ajax('onRefresh', { update: { statistics: '#statsPanel' } }) }}

Note: When attempting to reference a component's alias with __SELF__ as an argument to form_ajax() you must first build the string you wish to use outside of the call itself. Example:

{% set targetPartial = "'" ~ __SELF__ ~ "::statistics': '#statsPanel'" %}
{{ form_ajax('onUpdate', { update: targetPartial }) }}

The function support the following options:

Option Description
success JavaScript string to execute on successful result.
error JavaScript string to execute on failed result.
confirm A confirmation message to display before sending the request.
redirect On successful result, redirect to a URL.
update An array of partials to update on success in the following format: { 'partial': '#element' }.
data Extra data to include with the request in the following format: { 'myvar': 'myvalue' }.

# form_close()

Outputs a standard FORM closing tag. This tag is generally available to provide consistency in usage.

{{ form_close() }}

The above example would output as the following:

</form>

# Passing Attributes to the Generated Element

You can pass additional attributes to the Form::open() method by passing an array of attribute names and values to be rendered on the final generated <form> element.

<?= Form::open(array('id' => 'example', 'class' => 'something')) ?>
    // ..
<?= Form::close() ?>

The above example would output the following:

<form method="POST" action="" accept-charset="UTF-8" id="example" class="something">

</form>

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