element_template.php

<?php
/**
 * Template: element-activepage.php
 *
 * Available data: $element_id, $type, $id, $name, $classes, $description, $required, $answers, $response, $extra_attr, $response_year, $response_month, $response_day, $years, $months, $days
 */
?>
<div class="<?php echo esc_attr( implode( ' ', $classes ) ); ?>">
  <?php do_action( 'torro_element_start', $element_id ); ?>

  <input id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>" type="text" value="<?php echo $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; ?>">

  <?php do_action( 'torro_element_end', $element_id ); ?>
</div>

element_type.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

final class Torro_Forms_ActivePage_Element_Type_ActivePage extends Torro_Element_Type {
	/**
	 * Initializing.
	 *
	 * @since 1.0.0
	 */
	protected function init() {
		$this->name        = 'activepage';
		$this->title       = __( 'ActivePage', 'torro-forms-activepage' );
		$this->description = __( 'Aktive Seite', 'torro-forms-activepage' );
		$this->icon_url    = torro()->get_asset_url( 'icon-text', 'png' );
		$this->input       = true;

	}

	public function validate( $input, $element ) {



		//$input = trim( stripslashes( $input ) );

		return $input;
	}

}

torro()->element_types()->register( 'Torro_Forms_ActivePage_Element_Type_ActivePage' );