Hi, can i ask some help how can i do search using the LIKE operator in PDO.

here is my code but it's not working

Code:
        $strcon= $dbconn->prepare("SELECT employee_name
                          FROM employee where employee_name LIKE '%?%'

                          ");
        $strconn->bindParam(1,$querysearch);
        $strconn->execute();

Thank you in advance