esc_attr( $email ), 'status' => 'subscribed', 'merge_fields' => [ 'FNAME' => esc_attr( $first_name ), 'LNAME' => esc_attr( $last_name ) ] ); $args = array( 'method' => 'PUT', 'headers' => array( 'Authorization' => 'Basic ' . base64_encode( 'user:'. $api_key ) ), 'body' => json_encode( $extra_args ) ); $response = wp_remote_get( 'https://'.$dc.'.api.mailchimp.com/3.0/lists/'. esc_attr( $list_id ) .'/members/'. esc_attr( $memberID ), $args ); $body = json_decode( $response['body'] ); if ( $response['response']['code'] == 200 ) { echo "success"; }elseif( $response['response']['code'] == 214 ){ echo "already"; }else { echo "failure"; } wp_die(); } public static function instance() { if ( is_null( self::$_instance ) ) { self::$_instance = new self(); } return self::$_instance; } } CEA_AJAX::instance();