我做了一个LEFT JOIN
从数据库的两个表中获取值。
查询如下:
SELECT *
FROM thread
LEFT JOIN comments ON thread.id_thread = comments.id_thread
WHERE id_type = '1'
ORDER BY data DESC, hour DESC
然后我按如下方式输出值:
<?
while($row = mysqli_fetch_array($query))
{
echo '<div class="col-md-1"></div>';
echo '<div class="col-md-11">';
echo $row['title'] ."<br><br>".$row['content']."<br><br>";
echo $row['content_com'];
echo '<div class="col-md-2 pull-right">'. "date: ".$row['data']."<br>"."author: ".'<a href ="/user.php?id='.$row['username'].'">'.$row['username'].'</a>'.'</div>' ."<br><br>";
echo '<form role="form" action="commit.php" method="post"><div class="col-md-offset-1 col-md-9"><input class="form-control" type="text" name="comm"><input type="hidden" name="thread_id" value="'.$row['id_thread'].'"></div></form> <br><br><hr><br>';
echo '</div>';
}
mysqli_close($connect);
?>
然后在commit.php(表单操作)中:
<?php
session_start();
if(isset($_SESSION['id']))
{
$servername = "mysql9.000webhost.com";
$username = "a5461665_admin";
$password = "xenovia1";
$dbname = "a5461665_pap";
$connect = mysqli_connect($servername, $username, $password, $dbname);
$id = (isset($_GET['id'])) ? $_GET['id'] : $_SESSION['id'];
$ctn = $_POST["comm"];
$com = mysqli_query($connect,"INSERT INTO comments(content_com,id_thread) values ('".$ctn."', '".$_POST['thread_id']."')");
header("location:javascript://history.go(-1)");
if (!$connect) {
die("Connection failed: " . mysqli_connect_error());
}
}
else
{
header(" url=index.php");
}
?>
我的问题是,隐藏的输入框正在将表
id_thread
中的字段comments
传递给表单操作,但我希望它将表id_thread
中的字段threads
传递给表单操作,我该怎么做?? 最佳答案
SELECT *, thread.id_thread as mycol
FROM
thread LEFT JOIN comments
ON thread.id_thread=comments.id_thread
WHERE thread.id_type = '1'
ORDER BY data desc, hour desc
使用表指定列名并将其别名。
因此,对于所有列,
SELECT *
和以前一样,现在取thread.id_thread
并将其别名为mycol
。这将是现在可用的mycol
和没有更多的名称冲突。