显示查询结果的问题 [英] Problem displaying query results

问题描述

我使用 phpMyAdmin 设置了一个 MySQL 表，您可以在下图中查看:

I have a MySQL table set up using phpMyAdmin which you can view in the images below:

这是填充的表格:

我遇到的问题是，当我发出以下查询时，没有返回任何结果.我正在努力找出原因.

The problem I have is when I issue the following query, no results are returned. I am struggling to work out why.

<?php

$db_host     = 'localhost';
$db_user     = 'root';
$db_pass     = 'root';
$db_database = 'bbg_db_2'; 

$dbc = mysql_connect($db_host,$db_user,$db_pass);
$sdb = mysql_select_db($db_database);

$query = "SELECT category_name, category_desc FROM categories";
$result = mysql_query($sdb, $dbc, $query) or die (mysql_error($dbc));

while ($row = mysql_fetch_array($result)) {

   $catname = $row["category_name"];
   $catdesc = $row["category_desc"];

   echo "<li>$catname</br><span>$catdesc</span></a></li>";
}
?>

当我发出此查询时，我没有收到任何错误消息，也没有显示任何结果.我想要做的就是获取所有这些类别及其描述的列表.有什么想法吗?

When I issue this query I get no error messages and no results displayed. All I am trying to do is get a list of all these categories with their descriptions. Any Ideas?

推荐答案

mysql_query 是错误的.mysql_select_db 的结果不属于那里，查询应该是第一个参数.

Your parameters to mysql_query are wrong. The results of mysql_select_db do not belong there, and the query should be the first parameter.

查看您使用的每个函数的文档.

Check out the documentation for every function you use.

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