如何在Php中将foreach转换为if

我想把foreach转换成if语句，因为mysql查询只返回一行，所以我想用if代替foreach

    $db = new db();
    $db -> serverconnection();

    $item = $_GET["name"];

    $query = "SELECT c.firstname,c.phonenumber,c.address FROM `order` o,customerdetails c WHERE o.ordercode = '$item' AND c.sno=o.customerid";

        $results = $db->selectQuery($query);


            foreach ($results as $customerdetails)
            {
                $orderidDetail = $customerdetails['customerid'];
                echo $customerdetails["firstname"];
                echo $customerdetails["phonenumber"];
                echo $customerdetails["address"];       
           }

使用

差不多

if (count($results) == 1) { 
   ... single row of results ...
} else {
   foreach(...) { ... multiple rows ...}
}

也许吧

但是如果您知道查询只返回一行，那么无论如何您都不需要if/foreach

foreach ($results as $customerdetails)
{
    $orderidDetail = $customerdetails['customerid'];
    echo $customerdetails["firstname"];
    echo $customerdetails["phonenumber"];
    echo $customerdetails["address"];       

}

到

---

}

如果是，目的是什么？

foreach ($results as $customerdetails)
{
    $orderidDetail = $customerdetails['customerid'];
    echo $customerdetails["firstname"];
    echo $customerdetails["phonenumber"];
    echo $customerdetails["address"];       

if(isset($results[0]))
{
    $orderidDetail = $results[0]['customerid'];
    echo $results[0]["firstname"];
    echo $results[0]["phonenumber"];
    echo $results[0]["address"];