plugin install

wp/wp-content/plugins/gravityforms/includes/settings/fields/class-hidden.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Gravity_Forms\Gravity_Forms\Settings\Fields;
+
+use Gravity_Forms\Gravity_Forms\Settings\Fields;
+
+defined( 'ABSPATH' ) || die();
+
+class Hidden extends Base {
+
+	/**
+	 * Field type.
+	 *
+	 * @since 2.5
+	 *
+	 * @var string
+	 */
+	public $type = 'hidden';
+
+
+
+
+
+	// # RENDER METHODS ------------------------------------------------------------------------------------------------
+
+	/**
+	 * Render field.
+	 *
+	 * @since 2.5
+	 *
+	 * @return string
+	 */
+	public function markup() {
+
+		// Get value.
+		$value = $this->get_value();
+
+		// Convert value to JSON string.
+		if ( is_array( $value ) ) {
+			$value = json_encode( $value );
+		}
+
+		// Prepare markup.
+		$html = sprintf(
+			'<input type="hidden" name="%1$s_%2$s" value=\'%3$s\' %4$s />',
+			esc_attr( $this->settings->get_input_name_prefix() ),
+			esc_attr( $this->name ),
+			esc_attr( $value ),
+			implode( ' ', $this->get_attributes() )
+		);
+
+		return $html;
+
+	}
+
+}
+
+Fields::register( 'hidden', '\Gravity_Forms\Gravity_Forms\Settings\Fields\Hidden' );