准备好的声明与％

Question

您好我正在努力让以下准备好的声明发挥作用，任何人都可以帮助我吗？我知道怎么做没有符号％但在这种情况下我需要它来执行搜索

$sql = "SELECT user_first, user_last, user_email, user_id ";
        $sql.=" FROM users";
        $sql.=" WHERE ( user_first LIKE ?% ";
        $sql.=" OR user_last LIKE ?% ";
        $sql.=" OR user_email LIKE ?% )";
        $sql.=" AND user_role='partner'";


        $query= mysqli_stmt_prepare($conn, $sql);
        mysqli_stmt_bind_param($query, 'sss', $requestData['search']['value'], $requestData['search']['value'], $requestData['search']['value']  );
        mysqli_stmt_execute($query);
        mysqli_stmt_store_result($query);
        $totalFiltered = mysqli_stmt_num_rows($query);