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[Simple Analytics] Add Data Layer & Form Event Tracking #204

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28 changes: 28 additions & 0 deletions assets/js/mailchimp.js
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Expand Up @@ -109,3 +109,31 @@
});
}
})(window.jQuery);

/* Form view tracking for analytics */
(function () {
if (!window.mailchimpSF || !window.mailchimpSF.analytics_ajax_url) {
return;
}

const forms = document.querySelectorAll('.mc_signup_form[data-list-id]');
const tracked = {};

for (let i = 0; i < forms.length; i++) {
const listId = forms[i].getAttribute('data-list-id');
if (listId && !tracked[listId]) {
tracked[listId] = true;

const formData = new FormData();
formData.append('action', 'mailchimp_sf_track_form_view');
formData.append('list_id', listId);
formData.append('nonce', window.mailchimpSF.analytics_nonce);
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@iamdharmesh iamdharmesh Mar 28, 2026

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Can use something like mailchimp_sf_nonce to prevent potential conflict with other plugins.


fetch(window.mailchimpSF.analytics_ajax_url, {
method: 'POST',
body: formData,
credentials: 'same-origin',
});
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@iamdharmesh iamdharmesh Mar 28, 2026

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Suggested change
});
}).catch(() => {});

To prevent unhandled promise rejections in the browser console

}
}
Comment on lines +113 to +138
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Copilot AI Mar 28, 2026

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The new form-view tracking runs immediately when mailchimp.js is loaded, which can also execute in wp-admin contexts (the setup preview explicitly enqueues this script) and inflate view counts. Add an explicit guard to disable tracking in admin/preview contexts (or only enable when the localized analytics config indicates a real frontend render).

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})();
16 changes: 13 additions & 3 deletions includes/admin/templates/analytics.php
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Expand Up @@ -84,9 +84,19 @@
</div>

<div class="mailchimp-sf-analytics-content" id="mailchimp-sf-analytics-content">
<div class="mailchimp-sf-analytics-placeholder">
<p><?php esc_html_e( 'Select a date range and list to view analytics.', 'mailchimp' ); ?></p>
</div>
<?php
$analytics_data = new Mailchimp_Analytics_Data();
$end_date = current_time( 'Y-m-d' );
$start_date = gmdate( 'Y-m-d', strtotime( '-30 days' ) );
Comment on lines +88 to +90
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$end_date uses current_time('Y-m-d') (site timezone) while $start_date uses gmdate() (UTC). Since event_date is stored using current_time('Y-m-d'), mixing timezones can shift the queried range by a day on some sites. Use a consistent timezone for both (e.g., compute $start_date from current_time('timestamp') or wp_date() in site timezone).

Suggested change
$analytics_data = new Mailchimp_Analytics_Data();
$end_date = current_time( 'Y-m-d' );
$start_date = gmdate( 'Y-m-d', strtotime( '-30 days' ) );
$analytics_data = new Mailchimp_Analytics_Data();
$current_timestamp = current_time( 'timestamp' );
$end_date = wp_date( 'Y-m-d', $current_timestamp );
$start_date = wp_date( 'Y-m-d', $current_timestamp - ( 30 * DAY_IN_SECONDS ) );

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$totals = $analytics_data->get_totals( $current_list, $start_date, $end_date );
$daily = $analytics_data->get_analytics_data( $current_list, $start_date, $end_date );
?>
<h3><?php esc_html_e( 'Totals (Last 30 days)', 'mailchimp' ); ?></h3>
<pre><?php print_r( $totals ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r ?></pre>

<h3><?php esc_html_e( 'Daily Breakdown', 'mailchimp' ); ?></h3>
<pre><?php print_r( $daily ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r ?></pre>
Comment on lines +96 to +99
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The Analytics admin template is currently outputting raw data via print_r() inside <pre> blocks. This looks like debug output and will ship to production (and bypasses any intended UI/Chart rendering), making the page noisy and harder to maintain. Replace this with proper, escaped rendering (e.g., table/chart markup) or restore the placeholder until the UI is implemented.

Suggested change
<pre><?php print_r( $totals ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r ?></pre>
<h3><?php esc_html_e( 'Daily Breakdown', 'mailchimp' ); ?></h3>
<pre><?php print_r( $daily ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r ?></pre>
<?php if ( ! empty( $totals ) && is_array( $totals ) ) : ?>
<table class="widefat striped">
<thead>
<tr>
<th><?php esc_html_e( 'Metric', 'mailchimp' ); ?></th>
<th><?php esc_html_e( 'Value', 'mailchimp' ); ?></th>
</tr>
</thead>
<tbody>
<?php foreach ( $totals as $metric_key => $metric_value ) : ?>
<tr>
<td><?php echo esc_html( $metric_key ); ?></td>
<td>
<?php
if ( is_array( $metric_value ) || is_object( $metric_value ) ) {
echo esc_html( wp_json_encode( $metric_value ) );
} else {
echo esc_html( (string) $metric_value );
}
?>
</td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php else : ?>
<p><?php esc_html_e( 'No totals data is currently available for this period.', 'mailchimp' ); ?></p>
<?php endif; ?>
<h3><?php esc_html_e( 'Daily Breakdown', 'mailchimp' ); ?></h3>
<?php if ( ! empty( $daily ) && is_array( $daily ) ) : ?>
<?php
$first_row = reset( $daily );
$has_header = is_array( $first_row ) && ! empty( $first_row );
?>
<table class="widefat striped">
<?php if ( $has_header ) : ?>
<thead>
<tr>
<?php foreach ( array_keys( $first_row ) as $header_key ) : ?>
<th><?php echo esc_html( $header_key ); ?></th>
<?php endforeach; ?>
</tr>
</thead>
<?php endif; ?>
<tbody>
<?php foreach ( $daily as $row ) : ?>
<tr>
<?php
if ( is_array( $row ) ) {
foreach ( $row as $cell_value ) {
if ( is_array( $cell_value ) || is_object( $cell_value ) ) {
$cell_output = wp_json_encode( $cell_value );
} else {
$cell_output = (string) $cell_value;
}
?>
<td><?php echo esc_html( $cell_output ); ?></td>
<?php
}
} else {
if ( is_array( $row ) || is_object( $row ) ) {
$row_output = wp_json_encode( $row );
} else {
$row_output = (string) $row;
}
?>
<td><?php echo esc_html( $row_output ); ?></td>
<?php } ?>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php else : ?>
<p><?php esc_html_e( 'No daily analytics data is currently available for this period.', 'mailchimp' ); ?></p>
<?php endif; ?>

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</div>

<?php if ( $dc ) : ?>
Expand Down
2 changes: 1 addition & 1 deletion includes/blocks/mailchimp/markup.php
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Expand Up @@ -105,7 +105,7 @@ function ( $single_list ) {
}
?>
<div id="mc_signup_<?php echo esc_attr( $form_id ); ?>">
<form method="post" action="#mc_signup_<?php echo esc_attr( $form_id ); ?>" id="mc_signup_form_<?php echo esc_attr( $form_id ); ?>" class="mc_signup_form">
<form method="post" action="#mc_signup_<?php echo esc_attr( $form_id ); ?>" id="mc_signup_form_<?php echo esc_attr( $form_id ); ?>" class="mc_signup_form" data-list-id="<?php echo esc_attr( $list_id ); ?>">
<input type="hidden" class="mc_submit_type" name="mc_submit_type" value="html" />
<input type="hidden" name="mcsf_action" value="mc_submit_signup_form" />
<input type="hidden" name="mailchimp_sf_list_id" value="<?php echo esc_attr( $list_id ); ?>" />
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218 changes: 218 additions & 0 deletions includes/class-mailchimp-analytics-data.php
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@@ -0,0 +1,218 @@
<?php
/**
* Class responsible for form analytics data storage and retrieval.
*
* @package Mailchimp
*/

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
exit;
}

/**
* Class Mailchimp_Analytics_Data
*/
class Mailchimp_Analytics_Data {

/**
* Database version for the analytics table.
*
* @var string
*/
const DB_VERSION = '1.0';
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@iamdharmesh iamdharmesh Mar 28, 2026

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Suggested change
const DB_VERSION = '1.0';
const DB_VERSION = '1.0.0';


/**
* Initialize the class.
*/
public function init() {
add_action( 'wp_ajax_mailchimp_sf_track_form_view', array( $this, 'handle_form_view' ) );
add_action( 'wp_ajax_nopriv_mailchimp_sf_track_form_view', array( $this, 'handle_form_view' ) );
add_action( 'mailchimp_sf_form_submission_success', array( $this, 'track_submission' ) );
}
Comment on lines +28 to +32
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This PR introduces new analytics behaviors (AJAX endpoint for view tracking, DB writes, and a new submission-success hook) but doesn’t add/extend automated coverage. There is an existing Cypress suite under tests/cypress; adding at least one e2e test that verifies view tracking + submission tracking increments the expected counts would help prevent regressions.

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/**
* Get the analytics table name.
*
* @return string
*/
public static function get_table_name() {
global $wpdb;
return $wpdb->prefix . 'mailchimp_sf_form_analytics';
}

/**
* Create the analytics table.
*/
public static function create_table() {
global $wpdb;

$table_name = self::get_table_name();
$charset_collate = $wpdb->get_charset_collate();

$sql = "CREATE TABLE {$table_name} (
id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
list_id varchar(20) NOT NULL,
form_id varchar(50) NOT NULL DEFAULT '',
event_date date NOT NULL,
views bigint(20) unsigned NOT NULL DEFAULT 0,
submissions bigint(20) unsigned NOT NULL DEFAULT 0,
PRIMARY KEY (id),
UNIQUE KEY list_form_date (list_id, form_id, event_date)
) {$charset_collate};";

require_once ABSPATH . 'wp-admin/includes/upgrade.php';
dbDelta( $sql );

update_option( 'mailchimp_sf_analytics_db_version', self::DB_VERSION );
}

/**
* Increment the view count for a list on today's date.
*
* @param string $list_id The list ID.
* @param string $form_id The form ID.
*/
public function increment_views( $list_id, $form_id = '' ) {
global $wpdb;

$table_name = self::get_table_name();

// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$wpdb->query(
$wpdb->prepare(
"INSERT INTO {$table_name} (list_id, form_id, event_date, views, submissions)
VALUES (%s, %s, %s, 1, 0)
ON DUPLICATE KEY UPDATE views = views + 1",
$list_id,
$form_id,
current_time( 'Y-m-d' )
)
);
Comment on lines +82 to +91
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@iamdharmesh iamdharmesh Mar 28, 2026

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Maybe better to add some error handling here and log the failures.

// phpcs:enable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
}

/**
* Increment the submission count for a list on today's date.
*
* @param string $list_id The list ID.
* @param string $form_id The form ID.
*/
public function increment_submissions( $list_id, $form_id = '' ) {
global $wpdb;

$table_name = self::get_table_name();

// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$wpdb->query(
$wpdb->prepare(
"INSERT INTO {$table_name} (list_id, form_id, event_date, views, submissions)
VALUES (%s, %s, %s, 0, 1)
ON DUPLICATE KEY UPDATE submissions = submissions + 1",
$list_id,
$form_id,
current_time( 'Y-m-d' )
)
);
Comment on lines +107 to +116
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@iamdharmesh iamdharmesh Mar 28, 2026

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Same as above.

// phpcs:enable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
}

/**
* Get analytics data for a list within a date range.
*
* @param string $list_id The list ID.
* @param string $start_date Start date (Y-m-d).
* @param string $end_date End date (Y-m-d).
* @return array Array of daily analytics rows.
*/
public function get_analytics_data( $list_id, $start_date, $end_date ) {
global $wpdb;

$table_name = self::get_table_name();

// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$results = $wpdb->get_results(
$wpdb->prepare(
"SELECT event_date, SUM(views) AS views, SUM(submissions) AS submissions
FROM {$table_name}
WHERE list_id = %s AND event_date BETWEEN %s AND %s
GROUP BY event_date
ORDER BY event_date ASC",
$list_id,
$start_date,
$end_date
),
ARRAY_A
);
// phpcs:enable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared

return $results;
}

/**
* Get totals for a list within a date range.
*
* @param string $list_id The list ID.
* @param string $start_date Start date (Y-m-d).
* @param string $end_date End date (Y-m-d).
* @return array Associative array with total views and submissions.
*/
public function get_totals( $list_id, $start_date, $end_date ) {
global $wpdb;

$table_name = self::get_table_name();

// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$result = $wpdb->get_row(
$wpdb->prepare(
"SELECT COALESCE(SUM(views), 0) AS total_views, COALESCE(SUM(submissions), 0) AS total_submissions
FROM {$table_name}
WHERE list_id = %s AND event_date BETWEEN %s AND %s",
$list_id,
$start_date,
$end_date
),
ARRAY_A
);
// phpcs:enable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.PreparedSQL.InterpolatedNotPrepared

if ( ! $result ) {
return array(
'total_views' => 0,
'total_submissions' => 0,
);
}

return $result;
}

/**
* Handle the AJAX form view tracking request.
*/
public function handle_form_view() {
// Verify nonce.
if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'mailchimp_sf_analytics_nonce' ) ) {
wp_send_json_error( 'Invalid nonce.', 403 );
}

$list_id = isset( $_POST['list_id'] ) ? sanitize_text_field( wp_unslash( $_POST['list_id'] ) ) : '';

if ( empty( $list_id ) ) {
wp_send_json_error( 'Missing list_id.', 400 );
}

$this->increment_views( $list_id );
wp_send_json_success();
}

/**
Comment on lines +203 to +208
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handle_form_view() only checks that list_id is non-empty. As written, an unauthenticated request can create rows for arbitrary list_id values, which can bloat the analytics table and pollute reporting. Validate that list_id is one of the configured/known lists (e.g., from the mailchimp_sf_lists option or the active mc_list_id) and reject/ignore unknown IDs (also consider enforcing the expected length/format).

Suggested change
$this->increment_views( $list_id );
wp_send_json_success();
}
/**
// Ensure the list ID is one of the configured/known lists to prevent
// arbitrary IDs from polluting analytics data.
if ( ! $this->is_valid_list_id( $list_id ) ) {
wp_send_json_error( 'Invalid list_id.', 400 );
}
$this->increment_views( $list_id );
wp_send_json_success();
}
/**
* Determine whether a list ID is one of the configured/known lists.
*
* This helps ensure that analytics data is only recorded for legitimate lists
* configured within the plugin options.
*
* @param string $list_id The list ID to validate.
* @return bool True if the list ID is known/configured, false otherwise.
*/
private function is_valid_list_id( $list_id ) {
if ( empty( $list_id ) ) {
return false;
}
$valid_ids = array();
// Collect list IDs from the stored Mailchimp lists option, if present.
$mailchimp_lists = get_option( 'mailchimp_sf_lists' );
if ( is_array( $mailchimp_lists ) ) {
foreach ( $mailchimp_lists as $list ) {
// Handle both scalar IDs and associative array structures.
if ( is_string( $list ) || is_int( $list ) ) {
$valid_ids[] = (string) $list;
} elseif ( is_array( $list ) ) {
// Common keys used to store list IDs.
foreach ( array( 'id', 'list_id', 'mc_list_id' ) as $key ) {
if ( isset( $list[ $key ] ) && ! empty( $list[ $key ] ) ) {
$valid_ids[] = (string) $list[ $key ];
}
}
}
}
}
// Include the active Mailchimp list ID option, if set.
$active_list_id = get_option( 'mc_list_id' );
if ( ! empty( $active_list_id ) ) {
$valid_ids[] = (string) $active_list_id;
}
// If we have no configured IDs, fail closed and do not treat arbitrary IDs as valid.
if ( empty( $valid_ids ) ) {
return false;
}
$valid_ids = array_unique( $valid_ids );
return in_array( (string) $list_id, $valid_ids, true );
}
/**

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* Track a successful form submission.
*
* @param string $list_id The list ID.
*/
public function track_submission( $list_id ) {
if ( ! empty( $list_id ) ) {
$this->increment_submissions( $list_id );
}
}
}
1 change: 0 additions & 1 deletion includes/class-mailchimp-analytics.php
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Expand Up @@ -97,6 +97,5 @@ public function enqueue_scripts( $hook_suffix ) {
MCSF_VER,
true
);

}
}
7 changes: 7 additions & 0 deletions includes/class-mailchimp-form-submission.php
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Expand Up @@ -176,6 +176,13 @@ public function handle_form_submission() {
$message = __( 'Success, you\'ve been signed up! Please look for our confirmation email.', 'mailchimp' );
}

/**
* Fires after a successful form submission.
*
* @param string $list_id The list ID the user subscribed to.
*/
do_action( 'mailchimp_sf_form_submission_success', $list_id );

// Return success message.
return $message;
}
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10 changes: 10 additions & 0 deletions mailchimp.php
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Expand Up @@ -115,6 +115,14 @@ function () {
$analytics = new Mailchimp_Analytics();
$analytics->init();

// Analytics data class.
require_once plugin_dir_path( __FILE__ ) . 'includes/class-mailchimp-analytics-data.php';
$analytics_data = new Mailchimp_Analytics_Data();
$analytics_data->init();

// Create analytics table on activation.
register_activation_hook( __FILE__, array( 'Mailchimp_Analytics_Data', 'create_table' ) );

// Deprecated functions.
require_once plugin_dir_path( __FILE__ ) . 'includes/mailchimp-deprecated-functions.php';

Expand Down Expand Up @@ -171,6 +179,8 @@ function mailchimp_sf_load_resources() {
array(
'ajax_url' => trailingslashit( home_url() ),
'phone_validation_error' => esc_html__( 'Please enter a valid phone number.', 'mailchimp' ),
'analytics_ajax_url' => admin_url( 'admin-ajax.php' ),
'analytics_nonce' => wp_create_nonce( 'mailchimp_sf_analytics_nonce' ),
)
Comment on lines 179 to 184
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mailchimp_sf_load_resources() is called from admin screens for the form preview (e.g., setup page), and these localized analytics values will cause the frontend tracking code to fire in wp-admin and record “views” from administrators previewing the form. Consider only localizing analytics_ajax_url / analytics_nonce on the frontend (e.g., if ( ! is_admin() )) or otherwise gating tracking so admin previews don’t affect analytics.

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);

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6 changes: 6 additions & 0 deletions mailchimp_upgrade.php
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Expand Up @@ -26,6 +26,12 @@ function mailchimp_version_check() {
mailchimp_update_1_7_0();
}

// Create analytics table if it doesn't exist.
$analytics_db_version = get_option( 'mailchimp_sf_analytics_db_version' );
if ( false === $analytics_db_version || version_compare( Mailchimp_Analytics_Data::DB_VERSION, $analytics_db_version, '>' ) ) {
Mailchimp_Analytics_Data::create_table();
}

update_option( 'mc_version', MCSF_VER );
}

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2 changes: 1 addition & 1 deletion mailchimp_widget.php
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Expand Up @@ -92,7 +92,7 @@ function mailchimp_sf_signup_form( $args = array() ) {
?>

<div id="mc_signup_<?php echo esc_attr( $form_id ); ?>">
<form method="post" action="#mc_signup_<?php echo esc_attr( $form_id ); ?>" id="mc_signup_form_<?php echo esc_attr( $form_id ); ?>" class="mc_signup_form">
<form method="post" action="#mc_signup_<?php echo esc_attr( $form_id ); ?>" id="mc_signup_form_<?php echo esc_attr( $form_id ); ?>" class="mc_signup_form" data-list-id="<?php echo esc_attr( $list_id ); ?>">
<input type="hidden" class="mc_submit_type" name="mc_submit_type" value="html" />
<input type="hidden" name="mcsf_action" value="mc_submit_signup_form" />
<?php wp_nonce_field( 'mc_submit_signup_form', '_mc_submit_signup_form_nonce', false ); ?>
Expand Down
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