xprofile_check_member_type_added_previously()

function xprofile_check_member_type_added_previously() {

	global $wpdb;

	$response = array();
	$response['message'] = __( 'You can only have one instance of the "Profile Type" profile field.', 'buddyboss');

	$referer = filter_input( INPUT_POST, 'referer', FILTER_SANITIZE_STRING );

	parse_str( $referer, $parsed_array);

	if ( 'edit_field' === $parsed_array['mode'] ) {

		$current_edit_id = intval( $parsed_array['field_id'] );

		$exists_member_type = $wpdb->get_results( "SELECT COUNT(*) as count, id FROM {$wpdb->prefix}bp_xprofile_fields a WHERE parent_id = 0 AND type = 'membertypes' ");
		if ( intval( $exists_member_type[0]->count ) > 0 ) {
			if ( $current_edit_id === intval( $exists_member_type[0]->id ) ) {
				$response['status'] = 'not_added';
			} else {
				$response['status'] = 'added';
			}
		} else {
			$response['status'] = 'not_added';
		}
	} else {
		$exists_member_type = $wpdb->get_results( "SELECT COUNT(*) as count, id FROM {$wpdb->prefix}bp_xprofile_fields a WHERE parent_id = 0 AND type = 'membertypes' ");
		if ( intval( $exists_member_type[0]->count ) > 0 ) {
			$response['status'] = 'added';
		} else {
			$response['status'] = 'not_added';
		}
	}
	echo wp_json_encode( $response );
	wp_die();
}