choices

default: Symfony\Component\Intl\Intl::getCurrencyBundle()->getCurrencyNames()

The choices option defaults to all currencies.

empty_value

type: string or boolean

This option determines whether or not a special "empty" option (e.g. "Choose an option") will appear at the top of a select widget. This option only applies if the multiple option is set to false.

• Add an empty value with "Choose an option" as the text:

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  $builder->add('states', 'choice', array(
      'empty_value' => 'Choose an option',
  ));

• Guarantee that no "empty" value option is displayed:

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  $builder->add('states', 'choice', array(
      'empty_value' => false,
  ));

If you leave the empty_value option unset, then a blank (with no text) option will automatically be added if and only if the required option is false:

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// a blank (with no text) option will be added
$builder->add('states', 'choice', array(
    'required' => false,
));

error_bubbling

type: boolean default: false unless the form is compound

If true, any errors for this field will be passed to the parent field or form. For example, if set to true on a normal field, any errors for that field will be attached to the main form, not to the specific field.

expanded

type: boolean default: false

If set to true, radio buttons or checkboxes will be rendered (depending on the multiple value). If false, a select element will be rendered.

multiple

type: boolean default: false

If true, the user will be able to select multiple options (as opposed to choosing just one option). Depending on the value of the expanded option, this will render either a select tag or checkboxes if true and a select tag or radio buttons if false. The returned value will be an array.

preferred_choices

type: array default: array()

If this option is specified, then a sub-set of all of the options will be moved to the top of the select menu. The following would move the "Baz" option to the top, with a visual separator between it and the rest of the options:

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$builder->add('foo_choices', 'choice', array(
    'choices' => array('foo' => 'Foo', 'bar' => 'Bar', 'baz' => 'Baz'),
    'preferred_choices' => array('baz'),
));

Note that preferred choices are only meaningful when rendering as a select element (i.e. expanded is false). The preferred choices and normal choices are separated visually by a set of dotted lines (i.e. -------------------). This can be customized when rendering the field:

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{{ form_widget(form.foo_choices, { 'separator': '=====' }) }}

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<?php echo $view['form']->widget($form['foo_choices'], array(
          'separator' => '====='
)) ?>

These options inherit from the form type:

data

type: mixed default: Defaults to field of the underlying object (if there is one)

When you create a form, each field initially displays the value of the corresponding property of the form's domain object (if an object is bound to the form). If you want to override the initial value for the form or just an individual field, you can set it in the data option:

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$builder->add('token', 'hidden', array(
    'data' => 'abcdef',
));

disabled

type: boolean default: false

If you don't want a user to modify the value of a field, you can set the disabled option to true. Any submitted value will be ignored.

empty_data

type: mixed

DEFAULT_PLACEHOLDER

This option determines what value the field will return when the submitted value is empty.

But you can customize this to your needs. For example, if you want the gender choice field to be explicitly set to null when no value is selected, you can do it like this:

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$builder->add('gender', 'choice', array(
    'choices' => array(
        'm' => 'Male',
        'f' => 'Female'
    ),
    'required'    => false,
    'empty_value' => 'Choose your gender',
    'empty_data'  => null
));

The actual default value of this option depends on other field options:

• If multiple is false and expanded is false, then '' (empty string);
• Otherwise array() (empty array).

empty_data

type: mixed

DEFAULT_PLACEHOLDER

This option determines what value the field will return when the submitted value is empty.

But you can customize this to your needs. For example, if you want the gender choice field to be explicitly set to null when no value is selected, you can do it like this:

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$builder->add('gender', 'choice', array(
    'choices' => array(
        'm' => 'Male',
        'f' => 'Female'
    ),
    'required'    => false,
    'empty_value' => 'Choose your gender',
    'empty_data'  => null
));

label

type: string default: The label is "guessed" from the field name

Sets the label that will be used when rendering the field. Setting to false will suppress the label. The label can also be directly set inside the template:

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{{ form_label(form.name, 'Your name') }}

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echo $view['form']->label(
    $form['name'],
    'Your name'
);

label_attr

type: array default: array()

Sets the HTML attributes for the <label> element, which will be used when rendering the label for the field. It's an associative array with HTML attribute as a key. This attributes can also be directly set inside the template:

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{{ form_label(form.name, 'Your name', {
       'label_attr': {'class': 'CUSTOM_LABEL_CLASS'}
}) }}

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echo $view['form']->label(
    $form['name'],
    'Your name',
    array('label_attr' => array('class' => 'CUSTOM_LABEL_CLASS'))
);

mapped

type: boolean default: true

If you wish the field to be ignored when reading or writing to the object, you can set the mapped option to false.

read_only

type: boolean default: false

If this option is true, the field will be rendered with the readonly attribute so that the field is not editable.

required

type: boolean default: true

If true, an HTML5 required attribute will be rendered. The corresponding label will also render with a required class.

This is superficial and independent from validation. At best, if you let Symfony guess your field type, then the value of this option will be guessed from your validation information.