获取错误中的 pdo 获取

发布于 2024-09-25 07:19:39 字数 597 浏览 5 评论 0原文

我正在尝试运行以下脚本（未成功）：

$variables = $db->query("SELECT * FROM table1 WHERE Session_ID = '$sess1'");

while($row = $variables->fetch()) {

//FETCH DATA
$id= $row["ID"];
$info = $db->query("SELECT * FROM table2 WHERE ID = $id");

while($row2 = $info->fetch()) { 
    $name = $row2["FNAME"]." ".$row2["LNAME"]; }
    $phone = $row2["PHONE"];
}

//SEND CUSTOMER EMAIL
require("../email/email.php");                      
}

这会返回错误：致命错误：在...中的非对象上调用成员函数 fetch()

虽然我能够“解决”这个问题，这很丑陋。本质上，我必须在下面尝试的那个之前拨打几个电话（理论上应该可行）。

有什么想法吗？

原文

I am trying to run the following script (unsuccessfully):

$variables = $db->query("SELECT * FROM table1 WHERE Session_ID = '$sess1'");

while($row = $variables->fetch()) {

//FETCH DATA
$id= $row["ID"];
$info = $db->query("SELECT * FROM table2 WHERE ID = $id");

while($row2 = $info->fetch()) { 
    $name = $row2["FNAME"]." ".$row2["LNAME"]; }
    $phone = $row2["PHONE"];
}

//SEND CUSTOMER EMAIL
require("../email/email.php");                      
}

this returns the error: Fatal error: Call to a member function fetch() on a non-object in...

While I am able to "solve" the problem, it is ugly. Essentially I have to make several calls ahead of the one I'm trying below (which in theory should work).

Any ideas?

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清风挽心 2024-10-02 07:19:39

据我所知，您必须先从结果集中获取所有结果，然后才能发出新查询。如果您使用 MySQL，您可以通过调用 $db->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY,true); 来规避这一点，但我建议不要这样做，因为它会使您的代码不太可移植，并且 PDO 的主要优点（数据库抽象）丢失了。

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漫雪独思 2024-10-02 07:19:39

试试这个

    //prepare the query
    $variables = $db->prepare("SELECT * FROM table1 WHERE Session_ID = :sess1");
    $info = $db->prepare("SELECT * FROM table2 WHERE ID = :ID");

    //bind the variable :sess1 to $sess1
    $variables->bindParam(':sess1', $sess1, PDO::PARAM_STR);

    //execute the query 
    $variables->execute;

    //fetch the result
    $result = $variables->fetch(PDO::FETCH_ASSOC);

    //set $result['ID'] to a variable and bind it to the variable :ID in our second query
    $id = $result['ID'];
    $info->bindParam(':ID', $id, PDO::PARAM_INT);

    while($row2 = $info->fetch()) { 
        $name = $row2["FNAME"]." ".$row2["LNAME"]; }
        $phone = $row2["PHONE"];
    }

    //SEND CUSTOMER EMAIL
    require("../email/email.php");                      
    }

try this instead

    //prepare the query
    $variables = $db->prepare("SELECT * FROM table1 WHERE Session_ID = :sess1");
    $info = $db->prepare("SELECT * FROM table2 WHERE ID = :ID");

    //bind the variable :sess1 to $sess1
    $variables->bindParam(':sess1', $sess1, PDO::PARAM_STR);

    //execute the query 
    $variables->execute;

    //fetch the result
    $result = $variables->fetch(PDO::FETCH_ASSOC);

    //set $result['ID'] to a variable and bind it to the variable :ID in our second query
    $id = $result['ID'];
    $info->bindParam(':ID', $id, PDO::PARAM_INT);

    while($row2 = $info->fetch()) { 
        $name = $row2["FNAME"]." ".$row2["LNAME"]; }
        $phone = $row2["PHONE"];
    }

    //SEND CUSTOMER EMAIL
    require("../email/email.php");                      
    }

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