Question

我有这样的PHP代码：

$q = $db->query("SELECT * FROM tabe1_data WHERE status='1' ORDER BY id DESC LIMIT 10");
$cr_onr = array();
while($row = $db->fetchAll($q))
{
    $cr_onr[] = $row;
}


?>

<?php foreach($cr_onr as $new_cr_onr):?>

<?php $crinfo = $db->fetchOne("SELECT * FROM tabe2_data WHERE id ='".$new_cr_onr['op_id']."'");?>

<p><?=$new_cr_onr['username'];?> has been complete <?=$crinfo['op_amount'];?></p>

<?php endforeach;?>

我需要将$crinfo = $db->从“foreach”中取出来，然后才能在“foreach”之前

我怎么能这样做？

谢谢。

Answer 1

您可以加入表格而不是查询很多：

$q = $db->query("

    SELECT
        *
    FROM
        tabe1_data
    INNER JOIN
        tabe2_data ON tabe1_data.op_id = tabe2_data.id
    WHERE
        tabe1_data.status='1'
    ORDER BY
        tabe1_data.id DESC
    LIMIT 10

");

$cr_onr = array();

while($row = $db->fetchAll($q))
{
    $cr_onr[] = $row;
}


?>

<?php foreach($cr_onr as $new_cr_onr):?>

<p><?=$new_cr_onr['username'];?> has been complete <?=$new_cr_onr['op_amount'];?></p>

<?php endforeach;?>

Answer 2

单个加入查询？

SELECT tabe2_data.*
FROM tabe2_data
LEFT JOIN tabe1_data ON tabe1_data.op_id = tabe2_data.id
WHERE tabe1_data.status='1'

从foreach中取出我的sql以获取我的代码

2 个答案: