: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
$field = $form_data['fields'][ $field_id ];
// Skip validation if field is dynamic and choices are empty.
if ( $this->is_dynamic_choices_empty( $field, $form_data ) ) {
parent::validate( $field_id, $field_submit, $form_data );
* Format and sanitize field.
* @since 1.6.1 Added a support for multiple values.
* @param int $field_id Field ID.
* @param string|array $field_submit Submitted field value (selected option).
* @param array $form_data Form data and settings.
public function format( $field_id, $field_submit, $form_data ) {
$field = $form_data['fields'][ $field_id ];
$dynamic = ! empty( $field['dynamic_choices'] ) ? $field['dynamic_choices'] : false;
$multiple = ! empty( $field['multiple'] );
$name = sanitize_text_field( $field['label'] );
// Convert submitted field value to array.
if ( ! is_array( $field_submit ) ) {
$field_submit = [ $field_submit ];
$value_raw = wpforms_sanitize_array_combine( $field_submit );
'value_raw' => $value_raw,
'id' => wpforms_validate_field_id( $field_id ),
if ( 'post_type' === $dynamic && ! empty( $field['dynamic_post_type'] ) ) {
// Dynamic population is enabled using post type (like for a `Checkboxes` field).
$value_raw = implode( ',', array_map( 'absint', $field_submit ) );
$data['value_raw'] = $value_raw;
$data['dynamic'] = 'post_type';
$data['dynamic_items'] = $value_raw;
$data['dynamic_post_type'] = $field['dynamic_post_type'];
foreach ( $field_submit as $id ) {
if ( ! is_wp_error( $post ) && ! empty( $post ) && $data['dynamic_post_type'] === $post->post_type ) {
$posts[] = esc_html( wpforms_get_post_title( $post ) );
$data['value'] = ! empty( $posts ) ? wpforms_sanitize_array_combine( $posts ) : '';
} elseif ( 'taxonomy' === $dynamic && ! empty( $field['dynamic_taxonomy'] ) ) {
// Dynamic population is enabled using taxonomy (like for a `Checkboxes` field).
$value_raw = implode( ',', array_map( 'absint', $field_submit ) );
$data['value_raw'] = $value_raw;
$data['dynamic'] = 'taxonomy';
$data['dynamic_items'] = $value_raw;
$data['dynamic_taxonomy'] = $field['dynamic_taxonomy'];
foreach ( $field_submit as $id ) {
$term = get_term( $id, $field['dynamic_taxonomy'] );
if ( ! is_wp_error( $term ) && ! empty( $term ) ) {
$terms[] = esc_html( wpforms_get_term_name( $term ) );
$data['value'] = ! empty( $terms ) ? wpforms_sanitize_array_combine( $terms ) : '';
// Normal processing, dynamic population is off.
// If show_values is true, that means values posted are the raw values
// and not the labels. So we need to get the label values.
if ( ! empty( $field['show_values'] ) && (int) $field['show_values'] === 1 ) {
foreach ( $field_submit as $item ) {
foreach ( $field['choices'] as $choice ) {
if ( $item === $choice['value'] ) {
$value[] = $choice['label'];
$data['value'] = ! empty( $value ) ? wpforms_sanitize_array_combine( $value ) : '';
$data['value'] = $value_raw;
// Backward compatibility: for single dropdown save a string, for multiple - array.
if ( ! $multiple && is_array( $data ) && ( 1 === count( $data ) ) ) {
// Push field details to be saved.
wpforms()->get( 'process' )->fields[ $field_id ] = $data;
* Form frontend CSS enqueues.
* @param array $forms Forms on the current page.
public function enqueue_frontend_css( $forms ) {
$has_modern_select = false;
foreach ( $forms as $form ) {
if ( $this->is_field_style( $form, self::STYLE_MODERN ) ) {
$has_modern_select = true;
if ( $has_modern_select || wpforms()->get( 'frontend' )->assets_global() ) {
$min = wpforms_get_min_suffix();
WPFORMS_PLUGIN_URL . "assets/css/choices{$min}.css",
* Form frontend JS enqueues.
* @param array $forms Forms on the current page.
public function enqueue_frontend_js( $forms ) {
$has_modern_select = false;
foreach ( $forms as $form ) {
if ( $this->is_field_style( $form, self::STYLE_MODERN ) ) {
$has_modern_select = true;
if ( $has_modern_select || wpforms()->get( 'frontend' )->assets_global() ) {
$this->enqueue_choicesjs_once( $forms );
* Load WPForms Gutenberg block scripts.
public function enqueue_block_editor_assets() {
$min = wpforms_get_min_suffix();
WPFORMS_PLUGIN_URL . "assets/css/choices{$min}.css",
$this->enqueue_choicesjs_once( [] );
* Whether the provided form has a dropdown field with a specified style.
* @param array $form Form data.
* @param string $style Desired field style.
protected function is_field_style( $form, $style ) {
if ( empty( $form['fields'] ) ) {
foreach ( (array) $form['fields'] as $field ) {
! empty( $field['type'] ) &&
$field['type'] === $this->type &&
! empty( $field['style'] ) &&
sanitize_key( $style ) === $field['style']
* Get field name for an ajax error message.
* @param string|mixed $name Field name for error triggered.
* @param array $field Field settings.
* @param array $props List of properties.
* @param string|string[] $error Error message.
* @noinspection PhpMissingReturnTypeInspection
* @noinspection ReturnTypeCanBeDeclaredInspection
public function ajax_error_field_name( $name, $field, $props, $error ) {
if ( ! isset( $field['type'] ) || 'select' !== $field['type'] ) {
if ( ! empty( $field['multiple'] ) ) {
$input = isset( $props['inputs'] ) ? end( $props['inputs'] ) : [];
return isset( $input['attr']['name'] ) ? $input['attr']['name'] . '[]' : '';
new WPForms_Field_Select();