: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace WPForms\Integrations\DefaultThemes;
use WPForms\Integrations\IntegrationInterface;
class DefaultThemes implements IntegrationInterface {
* Twenty Twenty theme name.
const TT = 'twentytwenty';
* Twenty Twenty-One theme name.
const TT1 = 'twentytwentyone';
* Determine if WordPress default theme is used.
private function get_current_default_theme() {
$allowed_themes = [ self::TT, self::TT1 ];
$theme_name = $theme->get_template();
$theme_parent = $theme->parent();
$default_themes = array_intersect( array_filter( [ $theme_name, $theme_parent ] ), $allowed_themes );
return ! empty( $default_themes[0] ) ? $default_themes[0] : '';
* Indicate if current integration is allowed to load.
public function allow_load() {
$this->current_theme = $this->get_current_default_theme();
return ! empty( $this->current_theme );
if ( $this->current_theme === self::TT ) {
if ( $this->current_theme === self::TT1 ) {
* Hooks for the Twenty Twenty theme.
private function tt_hooks() { // phpcs:disable WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks
add_action( 'wp_enqueue_scripts', [ $this, 'tt_iframe_fix' ], 11 );
add_action( 'wpforms_frontend_css', [ $this, 'tt_dropdown_fix' ] );
} // phpcs:enable WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks
* Hooks for the Twenty Twenty-One theme.
private function tt1_hooks() { // phpcs:disable WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks
if ( wpforms_get_render_engine() === 'modern' ) {
$form_styling = wpforms_setting( 'disable-css', '1' );
if ( $form_styling === '1' ) {
add_action( 'wp_enqueue_scripts', [ $this, 'tt1_multiple_fields_fix' ], 11 );
add_action( 'wp_enqueue_scripts', [ $this, 'tt1_dropdown_fix' ], 11 );
if ( $form_styling === '2' ) {
add_action( 'wp_enqueue_scripts', [ $this, 'tt1_base_style_fix' ], 11 );
} // phpcs:enable WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks
* Apply fix for Checkboxes and Radio fields in the Twenty Twenty-One theme.
public function tt1_multiple_fields_fix() {
'twenty-twenty-one-style',
'@supports (-webkit-appearance: none) or (-moz-appearance: none) {
div.wpforms-container-full .wpforms-form input[type=checkbox] {
-webkit-appearance: checkbox;
-moz-appearance: checkbox;
div.wpforms-container-full .wpforms-form input[type=radio] {
-webkit-appearance: radio;
div.wpforms-container-full .wpforms-form input[type=checkbox]:after,
div.wpforms-container-full .wpforms-form input[type=radio]:after {
* Apply fix for Dropdown field arrow, when it disappeared from select in the Twenty Twenty-One theme.
public function tt1_dropdown_fix() {
'twenty-twenty-one-style',
'div.wpforms-container-full form.wpforms-form select {
background-image: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\' width=\'10\' height=\'10\' fill=\'%2328303d\'><polygon points=\'0,0 10,0 5,5\'/></svg>");
background-repeat: no-repeat;
background-position: right var(--form--spacing-unit) top 60%;
padding-right: calc(var(--form--spacing-unit) * 2.5);
* Apply fix for Checkboxes and Radio fields width in the Twenty Twenty-One theme, when the user uses only base styles.
public function tt1_base_style_fix() {
'twenty-twenty-one-style',
'.wpforms-container .wpforms-field input[type=checkbox],
.wpforms-container .wpforms-field input[type=radio] {
.wpforms-container .wpforms-field input[type=checkbox] + label,
.wpforms-container .wpforms-field input[type=radio] + label {
* Apply resize fix for iframe HTML element, when the next page was clicked in the Twenty Twenty theme.
public function tt_iframe_fix() {
'window.addEventListener( "load", function() {
if ( typeof jQuery === "undefined" ) {
jQuery( document ).on( "wpformsPageChange wpformsShowConditionalsField", function() {
if ( typeof twentytwenty === "undefined" || typeof twentytwenty.intrinsicRatioVideos === "undefined" || typeof twentytwenty.intrinsicRatioVideos.makeFit === "undefined" ) {
twentytwenty.intrinsicRatioVideos.makeFit();
jQuery( document ).on( "wpformsRichTextEditorInit", function( e, editor ) {
jQuery( editor.container ).find( "iframe" ).addClass( "intrinsic-ignore" );
* Apply fix for the dropdown list in Twenty Twenty theme.
public function tt_dropdown_fix() {
overflow: visible !important;