/**

 * Register the Smart Tag so it will be available to select in the form builder.

 *

 * @link   https://wpforms.com/developers/how-to-create-a-smart-tag-from-an-acf-field/

 */

function wpf_dev_register_smarttag( $tags ) {

    // Key is the tag, item is the tag name.

    $tags[ 'portfolio_price' ] = 'Portfolio Price';

    return $tags;

}

add_filter( 'wpforms_smart_tags', 'wpf_dev_register_smarttag' );

/**

 * Process the Smart Tag.

 *

 * @link   https://wpforms.com/developers/how-to-create-a-smart-tag-from-an-acf-field/

 */

function wpf_dev_process_smarttag( $content, $tag ) {

    // Only run if it is our desired tag.

    if ( 'portfolio_price' === $tag ) {

        //Get the field name from ACF

        $my_acf_field = get_field( 'portfolio_price', get_the_ID() );

        // Replace the tag with our link.

        $content = str_replace( '{portfolio_price}', $my_acf_field, $content );

    }

    return $content;

}

add_filter( 'wpforms_smart_tag_process', 'wpf_dev_process_smarttag', 10, 2 );