PHP PDO提取不起作用? [英] PHP PDO Fetch not working?

问题描述

我可以成功选择一个对象，但是我无法使用以下代码从数据库中获取所有行，有人可以看到任何明显的错误吗?

I can successfully select an object, but I cannot fetch all rows from the database using the following code, can anyone see any obvious errors?

    $sql2 = "SELECT ID, Latitude, Longitude, Name FROM Countries";
    $stmt2 = $pdo->prepare($sql2);
    $stmt2->execute();

    while ($row = $stmt2->fetch(PDO::FETCH_ASSOC)) {
        echo $countryID = $row->ID;
        echo $countryName= $row->Name;
        echo $longitude2 = $row->Longitude;
        echo $latitude2 = $row->Latitude;
    }

推荐答案

参数 PDO :: FETCH_ASSOC 告诉PDO将结果作为关联数组返回.所以你可以获取数组不是对象

The parameter PDO::FETCH_ASSOC tells PDO to return the result as an associative array. SO you can fetch array not object

 while ($row = $stmt2->fetch(PDO::FETCH_ASSOC)) {
        echo $countryID = $row['ID'];
        echo $countryName= $row['Name'];
         //Rest of the code

    }

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