Learn How to Search or Filter Mysql data by selecting multiple option from multi-select dropdown list box using PHP with Ajax. Live Data Search by using multi-select combo box by using Ajax with PHP. PHP Ajax Search filter mysql data by HTML select box element by selecting multiple option. For Source code and online demo - https://www.webslesson.info/2018/05/ajax-live-data-search-using-multi-select-dropdown-in-php.html