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frm_form_classes

Last Updated: May 7, 2018

Knowledge Base → Extend Formidable Forms → Formidable Hooks - for Developers → Form Appearance → frm_form_classes
Heads up!
This article contains PHP code and is intended for developers. We offer this code as a courtesy, but don't provide support for code customizations or 3rd party development.

This hook allows you to add classes to the <form> tag for all forms or only those that are specified. This code can be used to add a background color to your forms.

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Usage

add_action('frm_form_classes', 'frm_form_classes');
function frm_form_classes($form)

Parameters

  • $form (object)

Examples

Add a class to a form

add_action( 'frm_form_classes', 'frm_form_classes' );
function frm_form_classes( $form ) {
  if ( $form->id == 25 ) { //Change 25 to the ID of your form
    echo 'new_class';
  }
}

Add a class to all forms

add_action( 'frm_form_classes', 'frm_form_classes' );
function frm_form_classes( $form ) {
  echo 'new_class';
}

Add class to form based on param

You can use this code example to add a class to your form in some locations on your site but not others. This class can be used to add different styling to the form.

Use the add_class param to set the value of the new class. You can add the add_class param to your form shortcode or set it using frm-set-get.

Usage

  • As a param in the form shortcode: [formidable id="1245" add_class="rose"]
  • Using frm-set-get:
    [frm-set-get add_class="rose"]
    [formidable id="1245"]
    Or add a Formidable forms block to display the form.
    Note: frm-set-get needs to be before the form on the page.
add_action( 'frm_form_classes', 'frm_add_new_class' );
function frm_add_new_class( $form ) {
	if ( ! isset( $_GET['add_class'] ) ) {
		return;
	}

	$new_class = $_GET['add_class'];
	$new_class = utf8_decode( urldecode( $new_class ) );

	echo esc_html( $new_class );
}
  • Usage
  • Parameters
  • Examples
    • Add a class to a form
    • Add a class to all forms
    • Add class to form based on param
    • Usage
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