Sindbad~EG File Manager

<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * Class LP_Sessions_DB
 *
 * @since 4.1.1
 */
class LP_Sessions_DB extends LP_Database {
	private static $_instance;

	protected function __construct() {
		parent::__construct();
	}

	public static function getInstance() {
		if ( is_null( self::$_instance ) ) {
			self::$_instance = new self();
		}

		return self::$_instance;
	}

	/**
	 * Get delete rows in session table
	 *
	 * @throws
	 */
	public function delete_rows() {
		$now = current_time('timestamp');
		$adayago = $now - (24*60*60);
		$where = 'WHERE session_expiry < '.$adayago.'';
		$table = $this->tb_lp_sessions;
		$limit = 100;
		$result = $this->wpdb->query(
			"
			DELETE FROM {$table}
			{$where}
			LIMIT {$limit}
			"
		);

		$this->check_execute_has_error();

		return $result;
	}
	public function count_row_db_sessions() {
		global $wpdb;
		$now = current_time('timestamp');
		$adayago = $now - (24*60*60);
		$where = 'WHERE session_expiry < '.$adayago.' AND 0=%d';
		$query  = $wpdb->prepare(
			"
			SELECT count(*)
			FROM $this->tb_lp_sessions
			{$where}
			",
			0
		);

		$result = $wpdb->get_var( $query );
		return $result;
	}
}

LP_Sessions_DB::getInstance();