php使用上一页

Question

我想从数据库中查询某些内容但它根本不返回任何值。我想知道为什么它没有报告任何错误。请检查附件。

这是我制作的代码。谢谢。

echo '<form method = "post" action = "http://localhost:8080/nbm/delivery/show_delivery_details.php">';

$nbm = new Db();

$poid = $_GET['id'];// this was taken from the previous page
echo $poid;//tried to display this and it does

 $get_deliveries= $nbm->query("SELECT * FROM `customer_order_list` where purchase_order_id = '$poid'");

    foreach($get_deliveries as $key){
     echo $key['purchase_order_id'].'&nbsp;&nbsp;'.$key['customer_id'].'&nbsp;&nbsp;'.$key['amount'];

   }

print_r($get_deliveries);//also tried this but it displays nothing

echo '</form>';

Answer 1

$

Answer 2

<?php

$nbm = new Db();

$poid = $_GET['id'];
$get_deliveries= $nbm->query("SELECT * FROM `customer_order_list` where purchase_order_id = '$poid'");

echo '<form method = "post" action = "show_delivery_details.php">';

    foreach($get_deliveries as $key){
     echo $key['purchase_order_id'].'&nbsp;&nbsp;'.$key['customer_id'].'&nbsp;&nbsp;'.$key['amount'];

   }

echo '</form>';

＆GT;

尝试在foreach循环中打印$ key变量。而不是print_r使用var_dump（$ var）;

Answer 3

首先使用db中的get $ poid值首先执行查询。

SELECT * FROM `customer_order_list` where purchase_order_id = '$poid'

然后在$ res = $ nbm-＆gt;查询（SELECT * FROM customer_order_list，其中purchase_order_id ='$ poid'）。你想要获取结果。

mysql_fetch_result($res);

检查你是否这样做了。