资源ID#4为什么我得到这个? [英] resource id #4 Why am I getting this?
问题描述
我有一个非常基本的论坛模板，用于测试目的
I have a pretty basic forum template I am working on for testing purposes
当我创建一个主题并按Submit时，该过程将更新数据库，但不会在屏幕上输出.为什么是这样?当我从下面的代码中回显$ result时，为什么得到资源ID#4:
When I create a topic, and press submit, the proccess updates the database but doesn't output on the screen. Why is this? and Why am I getting a Resource id #4 when I echo the $result from this code below:
<?php
$host="server"; // Host name
$username="usernamehere"; // Mysql username
$password=""; // Mysql password
$db_name="forum"; // Database name
$tbl_name="question"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name ORDER BY id DESC";
// OREDER BY id DESC is order result by descending
$result=mysql_query($sql);
echo $result;
?>
<html>
<body>
<table width="90%" border="0" align="center" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td width="6%" align="center" bgcolor="#E6E6E6"><strong>#</strong></td>
<td width="53%" align="center" bgcolor="#E6E6E6"><strong>Topic</strong></td>
<td width="15%" align="center" bgcolor="#E6E6E6"><strong>Views</strong></td>
<td width="13%" align="center" bgcolor="#E6E6E6"><strong>Replies</strong></td>
<td width="13%" align="center" bgcolor="#E6E6E6"><strong>Date/Time</strong></td>
</tr>
<?php
// Start looping table row
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td bgcolor="#FFFFFF"><? echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><a href="view_topic.php?id=<? echo $rows['id']; ?>"><? echo $rows['topic']; ?></a><BR></td>
<td align="center" bgcolor="#FFFFFF"><? echo $rows['view']; ?></td>
<td align="center" bgcolor="#FFFFFF"><? echo $rows['reply']; ?></td>
<td align="center" bgcolor="#FFFFFF"><? echo $rows['datetime']; ?></td>
</tr>
<?php
// Exit looping and close connection
}
mysql_close();
?>
<tr>
<td colspan="5" align="right" bgcolor="#E6E6E6"><a href="create_topic.php"><strong>Create New Topic</strong> </a></td>
</tr>
</table>
</body>
</html>
推荐答案
由于$result是资源，因此您正在获取resource id #4，因此必须以这种方式提取其中包含的值，
You are getting resource id #4 because $result is an resource,you must extract the values contained in it by this way,
$result=mysql_query($sql);
$values = mysql_fetch_array($result);
var_dump($values);
有关资源变量
更新2(来自OP注释)
您正在使用字段名称打印值，在这种情况下，您将不得不更改为
You are printing values using field name,In that case you will have to change to
while($rows=mysql_fetch_array($result,MYSQL_ASSOC))
或者您可以直接使用 mysql_fetch_assoc() ，您的情况将是
Or you can directly use mysql_fetch_assoc(),which in your case will be
while($rows=mysql_fetch_assoc($result)){
echo $rows['id'];
}
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