连接LIKE预处理语句并获取结果不起作用

Question

我正在尝试在我的网站中编写搜索功能，但是连接$ sql语句并获取结果不起作用，我不知道他们为什么不工作，因为我不擅长预备语句。

 include("db.php");
if(isset($_GET["city"])&&isset($_GET["term"])){

$sql = "SELECT * FROM markers WHERE (city= ? name LIKE ? OR discrip LIKE ?)";
echo $sql;

$stmt = $con->prepare($sql);
$c = "'%". $_GET['city'] . "%'";
$t = "'%". $_GET['term'] . "%'";

$term = str_replace(",", " ", $t);

$city =  str_replace(",", " ", $c);

$stmt->bind_param("sss", $city, $term, $term);
$stmt->execute();
 while($row = $stmt->fetch_array(MYSQLI_ASSOC)){
$name = $row["name"];
$add = $row["address"];
$phone = $row["phonenum"];

}
}

?>