Widgets do not display translations on the front-end

Status: Resolved
Resolved in: 4.4.12

Overview of the issue

In some cases, widget translations may not display on the site’s front-end, and you will see the following error:

PHP Warning: array_merge(): Expected parameter 1 to be an array, null given in …\wp-content\plugins\sitepress-multilingual-cms\classes\widgets\class-wpml-widgets-support-frontend.php on line 61

Workaround

This issue will be fixed in our next WPML release, however you can use the following workaround in the meantime:

Before proceeding make a full backup of your site.

Go to your folder /plugins/sitepress-multilingual-cms/classes/widgets/.

Open the class-wpml-widgets-support-frontend.php file and replace 56-67 lines:

    private function it_must_display( $instance ) {
        if ( isset ( $instance['content'] ) ) {
            $matches  = Str::matchAll( self::TERM_REGEX, $instance['content'] );
            $matches  = Fns::map( pipe( Lst::nth( 0 ), Json::toArray() ), $matches );
            if ( count( $matches ) > 0 ) {
                $instance = array_merge(...$matches);
            }
        }
 
        return Lst::includes( Obj::propOr( null, 'wpml_language', $instance ), [ null, $this->current_language, 'all' ] );
    }
}

With:

    private function it_must_display( $instance ) {
        return ! array_key_exists( 'wpml_language', $instance )
               || $instance['wpml_language'] === $this->current_language
               || 'all' === $instance['wpml_language'];
    }
}

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