SQL ORDER BY /排序PHP
[英]SQL ORDER BY / Sort Php
问题描述
I am struggling with my php and would love some assistance in the right direction. 
我在用PHP挣扎，希望在正确的方向上提供一些帮助。 Here is my code so far: 到目前为止，这是我的代码：
<?php
$connection = mysql_connect("localhost", "root") or die(mysql_error());
mysql_select_db("rsi", $connection) or die(mysql_error());
$query = "SELECT * FROM events";
$result = mysql_query ($query) or die ("error in query");
if (mysql_num_rows($result)>0) {
echo "<table border=1></tr>" .
"<th>ID</th>" .
"<th>Name</th>" .
"<th>Date</th>" .
"<th>Location</th>" ;
while ($row = @ mysql_fetch_array($result)){
print "<tr>";
print "<td>".$row['id']."</td>";
print "<td>".$row['name']."</td>";
print "<td>".$row['date']."</td>";
print "<td>".$row['location']."</td>";
print "</tr>";
}
print "</table>";
}
?>
I am now hoping to order the results from the database by clicking on each/any of the headers (for example date). 我现在希望通过单击每个/任何标题（例如日期）来从数据库中排序结果。 Thanks for your time. 谢谢你的时间。
4 个解决方案
解决方案1
0 2014-11-11 02:22:59
I think you are looking to sort the table in the browser. 我认为您正在寻找在浏览器中对表格进行排序的方法。 You probably don't want to keep querying your database for the same information just in a different sort order. 您可能不希望仅以不同的排序顺序就数据库查询相同的信息。 Something like this perhaps: http://tablesorter.com/docs/#Demo 可能是这样的： http : //tablesorter.com/docs/#Demo
To use tablesorter: 要使用表排序器：
- Change one line of your code to: 将代码的一行更改为：
echo "<table border=1 id="myTable" class="tablesorter"><tr>" ."<th>ID</th>" ."<th>Name</th>" ."<th>Date</th>" ."<th>Location</th></tr>" ;
- Add this line at the end of the body: 在正文的末尾添加以下行：
<script> $(document).ready(function() { $("#myTable").tablesorter(); } ); </script>
- If you don't already have jquery, include it in the
<Head>section:如果还没有jquery，请将其包含在<Head>部分中：
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Download jquery.tablesorter.js from http://tablesorter.com/__jquery.tablesorter.zip
从http://tablesorter.com/__jquery.tablesorter.zip下载jquery.tablesorter.js Include the file jquery.tablesorter.js like this:
像这样包含文件jquery.tablesorter.js：
<script type="text/javascript" src="/path/to/jquery.tablesorter.js"></script>
解决方案2
0 2011-10-22 17:20:11
To order the result you use ORDER BY . 要订购结果，请使用ORDER BY 。
Here's an example to order by id: 以下是按ID排序的示例：
$query = "SELECT * FROM events ORDER BY id";
To get it to order when you click on a header you need to make it execute the new query in some way. 要在单击标题时对其进行排序，需要使其以某种方式执行新查询。 How to do that I leave out for you to find. 该如何做，我留给您查找。 Typically you reload the whole page with a parameter on what to sort on or use ajax, which would let you update contents on the page without reloading the page. 通常，您使用要排序的内容或使用ajax的参数重新加载整个页面，这将使您无需重新加载页面即可更新页面上的内容。
解决方案3
0 2011-10-22 17:22:34
You have to pass the order by column name and order ascending or decending by either GET or POST. 您必须按列名传递订单，并按GET或POST升序或降序。 Here is an example of GET. 这是GET的示例。
$query = "SELECT * FROM events";
if(isset($_GET['sort'])
{
$query.= ' order by '.mysql_real_escape_string($_GET['sort']).' '.mysql_real_escape_string($_GET['order']);
}
$result = mysql_query ($query) or die ("error in query");
while ($row = @ mysql_fetch_array($result)){
print "<tr>";
print "<td>".$row['id']."</td>";
print "<td>".$row['name']."</td>";
print "<td><a href='http://www.domain.com/currentpageurl?sort=date&order=asc'>".$row['date']."</td>";
print "<td>".$row['location']."</td>";
print "</tr>";
}
解决方案4
0 2011-10-22 18:12:22
If you use Shakti's answer, I would recommend not using $_GET directly in the query. 如果使用Shakti的答案，建议不要在查询中直接使用$ _GET。 I would run your $_GET through some sort of sanity check and only allow specific values, otherwise you are leaving your site open to SQL injection attacks. 我将通过某种健全性检查来运行$ _GET，并且只允许使用特定值，否则，您的站点将遭受SQL注入攻击。
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