Pre-submission confirmation for Gravity Forms, follow-up to http://gravitywiz.com/2012/04/30/simple-pre-submission-confirmation/

gf-preview.php

<?php
function gf_populate_confirmation_preview_html( $form ) {
    $confirmation_slug = "Kinnitamine"; # content target HTML field has to have this name
    $current_page = GFFormDisplay::get_current_page( $form[ "id" ] );
    $output_field = false;
    $has_product_fields = false;

    # http://www.gravityhelp.com/forums/topic/gform_post_paging-parameters-dont-match-form-pagination-pages-why
    if ( in_array( $confirmation_slug, $form[ "pagination" ][ "pages" ] ) && $form[ "pagination" ][ "pages" ][ $current_page - 1 ] == $confirmation_slug ) :
        foreach( $form[ "fields" ] as &$field ) :
            if ( GFCommon::is_product_field( $field[ "type" ] ) ) $has_product_fields = true;
            if ( $field[ "label" ] == $confirmation_slug ) $output_field = &$field;
        endforeach;

        # based on gravityforms/common.php v1.6.4.5.1 L866+
        if ( $output_field ) :
            $content = "";
            $products = array();
            foreach( $form[ "fields" ] as &$field ) :
                if ( RGFormsModel::is_field_hidden( $form, $field, array() ) || rgar( $field, "adminOnly" ) ) continue;

                $value = RGFormsModel::get_field_value( $field );
                if ( GFCommon::is_empty_array( $value ) ) continue;
                $label = sprintf( "<p class='field-label'>%s</p>", __( $field[ "label" ], "gravityforms" ) );
                $debug = sprintf( "<p class='field-value'>%s %s</p>", $field[ "type" ], print_r( $value, true ) );

                switch ( $field[ "type" ] ) {
                    case "captcha":
                    case "html":
                    case "page":
                    case "password":
                    case "section":
                    case "total":
                    break;

                    case "address":
                        $content .= $label;
                        $content .= "<ul class='" . $field[ "type" ] . "'>";
                        foreach ( $value as $k => $v ) if ( $v ) $content .= "<li>" . __( $v, "gravityforms" ) . "</li>";
                        $content .= "</ul>";
                    break;

                    case "checkbox":
                        $content .= $label;

                        $content .= sprintf( "<ul>" );
                        foreach ( $value as $k => $v )
                            if ( $v ) $content .= "<li class='" . $field[ "type" ] . "'>" . RGFormsModel::get_label( $field, $k ) . "</li>";
                        $content .= sprintf( "</ul>" );
                    break;

                    case "list":
                        $content .= $label;

                        if ( is_array( $value ) ) {
                            $content .= sprintf( "<table class='" . $field[ "type" ] . "'>" );

                            if ( isset( $field[ "choices" ] ) ) {
                                $content .= sprintf( "<thead><tr>" );
                                foreach ( $field[ "choices" ] as &$c ) {
                                    $content .= sprintf( "<td>" . $c[ "text" ] . "</td>" );
                                }
                                $content .= sprintf( "</tr></thead>" );
                            }

                            foreach ( $value as $val ) {
                                $content .= "<tr>";
                                foreach ( $val as $v ) $content .= "<td>" . $v . "</td>";
                                $content .= "</tr>";
                            }
                            $content .= sprintf( "</table>" );
                        }
                    break;

                    case "product": # products are displayed at the end
                        $field[ "myvalue" ] = print_r( RGFormsModel::get_field_value( $field ), true );
                        $products[] = $field;
                    break;

                    default:
                            $content .= $label;
                            $content .= "<p>" . $value . "</p>";
                }
            endforeach;

            $content .= "<p class='field-label'>Tellimus</p>";
            $content .= sprintf( "<table class='product'>" );
            $content .= sprintf( "<thead><tr>" );
            $content .= sprintf( "<td>" . __( "Product", "gravityforms" ) . "</td>" );
            $content .= sprintf( "<td class='quantity'>" . __( "Qty", "gravityforms" ) . "</td>" );
            $content .= sprintf( "<td class='price'>" . __( "Unit Price", "gravityforms" ) . "</td>" );
            $content .= sprintf( "</tr></thead>" );
            foreach ( $products as $p ) {
                # based on gravityforms/form_display.php v1.6.4.5.1 L803+
                if ( rgpost( "input_" . str_replace( ".", "_", $p[ "id" ] . ".3" ) ) && rgar( $p, "inputs" ) ) {
                    $inputs = array();
                    foreach ( $p[ "inputs" ] as $input ) {
                        $input_name = "input_" . str_replace( ".", "_", $input[ "id" ] );
                        $value = rgpost( $input_name );
                        if ( $value ) $inputs[ $input[ "label" ] ] = $value;
                    }

                    # need to do this to rearrange Quantity, Price columns
                    if ( ! empty ( $inputs ) && isset( $inputs[ "Price" ] ) && GFCommon::to_number( $inputs[ "Price" ] ) != 0 ) {
                        $content .= "<tr>";
                        $content .= "<td>" . ( isset( $inputs[ "Name" ] ) ? $inputs[ "Name" ] : "" ) . "</td>";
                        $content .= "<td class='quantity'>" . ( isset( $inputs[ "Quantity" ] ) ? $inputs[ "Quantity" ] : "" ) . "</td>";
                        $content .= "<td class='price'>" . ( isset( $inputs[ "Price" ] ) ? $inputs[ "Price" ] : "" ) . "</td>";
                        $content .= "</tr>";
                    }
                }
            }
            $content .= sprintf( "</table>" );
            $output_field[ "content" ] = $content;
        endif;
    endif;

    return $form;
}
add_filter( "gform_pre_render", "gf_populate_confirmation_preview_html" );
?>

how to use this with proper html form please provide me a sample code....