Keep Gravity Forms Displayed After Submission

gravity-forms-confirmation-remain.php

<?php
// Allow the Gravity form to stay on the page when confirmation displays.
add_filter( 'gform_pre_submission_filter', 'dw_show_confirmation_and_form' );
function dw_show_confirmation_and_form( $form ) {

    // Inserts a shortcode for the form without title or description
    $shortcode = '[gravityform id="' . $form['id'] . '" title="false" description="false"]';

    // Ensures that new lines are not added to HTML Markup
    ob_start();
    echo do_shortcode($shortcode);
    $html = str_replace(array("\r","\n"),'',trim(ob_get_clean()));

    // Inserts the form before the confirmation message
    if ( array_key_exists( 'confirmations', $form ) ) {
        foreach ( $form['confirmations'] as $key => $confirmation ) {
            $form['confirmations'][ $key ]['message'] = $html . '<div class="confirmation-message">' . $form['confirmations'][ $key ]['message'] . '</div>';
        }
    }

    return $form;
}

// Insert Javascript into the site footer to clear Gravity Forms inputs after submission
add_action( 'wp_footer', 'dw_gf_footer_scripts' );
function dw_gf_footer_scripts() {
    ?>
    <script>
    // Get all form inputs into arrays
    const inputs = document.querySelectorAll('.gform-body input');
    const textareas = document.querySelectorAll('.gform-body textarea');
    const inputsArray = Array.from(inputs);
    const textareasArray = Array.from(textareas);

    // Run clearValues on each input and textarea
    inputsArray.forEach(clearValues);
    textareasArray.forEach(clearValues);

    // Clear the values of inputs
    function clearValues( elem ) {
        // Do not clear hidden values
        if(elem.type !== 'hidden') {
            elem.value = '';
        }
    }
    </script>
    <?php
}

I made a little tweak and it is working for me with the latest version. Here's my code:

function dw_show_confirmation_and_form( $form ) {

	$shortcode = '[gravityform id="' . $form['id'] . '" title="false" description="false"]';

	ob_start();
	echo do_shortcode($shortcode);
	$html = ob_get_clean();

	if ( array_key_exists( 'confirmations', $form ) ) {
		foreach ( $form['confirmations'] as $key => $confirmation ) {
			$form['confirmations'][ $key ]['message'] = $html . '<div class="confirmation-message">' . $form['confirmations'][ $key ]['message'] . '</div>';
		}
	}

	return $form;
}
add_filter( 'gform_pre_submission_filter', 'dw_show_confirmation_and_form' );

My little contribution to this : ob_get_clean() will potentially add new lines, which will be visible with
HTML markup. In order to get rid of this, use this instead ->

function dw_show_confirmation_and_form( $form ) {

    $shortcode = '[gravityform id="' . $form['id'] . '" title="false" description="false"]';

    ob_start();
    echo do_shortcode($shortcode);
    $html = str_replace(array("\r","\n"),'',trim(ob_get_clean()));

    if ( array_key_exists( 'confirmations', $form ) ) {
        foreach ( $form['confirmations'] as $key => $confirmation ) {
            $form['confirmations'][ $key ]['message'] = $html . '<div class="confirmation-message">' . $form['confirmations'][ $key ]['message'] . '</div>';
        }
    }

    return $form;
}
add_filter( 'gform_pre_submission_filter', 'dw_show_confirmation_and_form' );

Thanks @mark-alexandre! This worked for me. The only thing missing is clearing the form fields after the confirmation loads. I used jQuery to do this. I only targeted visible fields to avoid overwriting any hidden form values. Code below:

function clearValues( elem ) {

    if($(elem).is(":visible")) {

        $(elem).val("");

    }
}

$(".gform-body input").each( function() {

    clearValues( $(this) );

});

$(".gform-body textarea").each( function() {

    clearValues( $(this) );

});

Thank you all for your suggestions and help rewriting the code! I've updated the gist, as well as the blog post that refers to it: https://davidwolfpaw.com/how-to-keep-gravity-forms-displayed-after-submission/

Been trying to solve this problem for ages with so many solutions online that didn't work at all. Finally came across your code... works absolutely perfectly. Can't thank you enough :)

Edit: Damn, spoke too soon. Sadly it doesn't seem to be compatible with Populate Anything :(

Edit: Damn, spoke too soon. Sadly it doesn't seem to be compatible with Populate Anything :(

I'm not familiar with how Populate Anything works. I could take a look if you have a link to a page with a form that you want to have this work on. @adxmeliora