php - 将数据添加到 MySQL 数据库中的相应条目

标签 php mysql database forms

我有一个将数据发送到数据库的提交表单。然后我以 HTML 格式从数据库中输出该数据。现在，我必须通过一个表单将更多的数据提交回数据库。我不知道如何使新数据与现有条目相对应。

这是我的输出代码(从数据库到 HTML 的数据以及附加数据的新表单):

<html>
<body>
<?php

mysql_connect(localhost,root,root);
@mysql_select_db(test) or die( "Unable to select database");
$query="SELECT * FROM submission";
$result=mysql_query($query);

$num=mysql_numrows($result);

mysql_close();
?>
<table border="0" cellspacing="2" cellpadding="2">
<tr>
<th><font face="Arial, Helvetica, sans-serif">Read By</font></th>
<th><font face="Arial, Helvetica, sans-serif">Date/Time</font></th>
<th><font face="Arial, Helvetica, sans-serif">URL</font></th>
<th><font face="Arial, Helvetica, sans-serif">Uploaded File</font></th>
<th><font face="Arial, Helvetica, sans-serif">Email / Twitter</font></th>
<th><font face="Arial, Helvetica, sans-serif"></font></th>
</tr>

<?php
$i=0;
while ($i < $num) {

$Date=mysql_result($result,$i,"Date");
$url=mysql_result($result,$i,"url");
$uploadedfile=mysql_result($result,$i,"uploadedfile");
$contact=mysql_result($result,$i,"contact");
?>

<tr><form name="reader" action="reader.php" method="POST">
<td><font face="Arial, Helvetica, sans-serif"><input type="checkbox" name="reader" value="Max"> Max <input type="checkbox" name="reader" value="Aaron"> Aaron</font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $Date; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $url; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $uploadedfile; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $contact; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><input type="submit" value="Submit"></font></td>
</form>
</tr>

<?php
$i++;
}
?>
</body>
</html>

这是 reader.php 代码:

    <?php

$error=0;

$con = mysql_connect('localhost', 'root', 'root'); //Replace with your actual MySQL DB Username and Password
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("longform", $con); //Replace with your MySQL DB Name
$reader=mysql_real_escape_string($_POST['reader']); //This value has to be the same as in the HTML form file
$sql="INSERT INTO submission (reader) VALUES ('$reader')"; /*collect is the name of the MySQL table where the form data will be saved.name, email and comments are the respective table fields*/

if (!mysql_query($sql,$con)) {
 die('Error: ' . mysql_error());
}

$message="Done!";
mysql_close($con); 


?>

现在，reader.php 添加了一个包含表单内容的新数据库条目，我需要它将该数据添加到现有的相应条目中。

编辑:所以，我刚刚意识到我需要使用更新而不是插入，但我不知道如何...

编辑:感谢评论者，我认为我在正确的方向上取得了一些进展。新代码仍然无法正常工作:

输出+表格:

<html>
<body>
<?php

$id=$_GET['id'];

mysql_connect(localhost,root,root);
@mysql_select_db(longform) or die( "Unable to select database");
$query="SELECT * FROM submission";
$result=mysql_query($query);

$num=mysql_numrows($result);

mysql_close();
?>
<table border="0" cellspacing="2" cellpadding="2">
<tr>
<th><font face="Arial, Helvetica, sans-serif">Read By</font></th>
<th><font face="Arial, Helvetica, sans-serif">Date/Time</font></th>
<th><font face="Arial, Helvetica, sans-serif">URL</font></th>
<th><font face="Arial, Helvetica, sans-serif">Uploaded File</font></th>
<th><font face="Arial, Helvetica, sans-serif">Email / Twitter</font></th>
<th><font face="Arial, Helvetica, sans-serif"></font></th>
</tr>

<?php
$i=0;
while ($i < $num) {

$Date=mysql_result($result,$i,"Date");
$url=mysql_result($result,$i,"url");
$uploadedfile=mysql_result($result,$i,"uploadedfile");
$contact=mysql_result($result,$i,"contact");
?>

<tr><form name="reader" action="reader.php" method="POST">
<td style="display:none;"><input type="hidden" name="unique_id" value="<? echo $id; ?>"></td>
<td><font face="Arial, Helvetica, sans-serif"><input type="checkbox" name="reader" value="Max"> Max <input type="checkbox" name="reader" value="Aaron"> Aaron</font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $Date; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $url; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $uploadedfile; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $contact; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><input type="submit" value="Submit"></font></td>
</form>
</tr>

<?php
$i++;
}
?>
</body>
</html>

阅读器.php:

<?php

$error=0;

$con = mysql_connect('localhost', 'root', 'root'); //Replace with your actual MySQL DB Username and Password
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("longform", $con); //Replace with your MySQL DB Name

$reader=mysql_real_escape_string($_POST['reader']); //This value has to be the same as in the HTML form file

$query="UPDATE submission SET reader='$reader' WHERE id='$unique_id'";
mysql_query($query);
echo "Record Updated";
mysql_close();

?>

任何对此的帮助都会震撼我的世界。

编辑:有效!我只是想在这里发布功能代码以防其他人需要它:

输出.php

<html>
<body>
<?php

mysql_connect(localhost,root,root);
@mysql_select_db(test) or die( "Unable to select database");
$query="SELECT * FROM table WHERE field = '';
";
$result=mysql_query($query);

$num=mysql_numrows($result);

mysql_close();
?>
<table border="0" cellspacing="2" cellpadding="2">
<tr>
<th></th>
<th><font face="Arial, Helvetica, sans-serif">Read By</font></th>
<th><font face="Arial, Helvetica, sans-serif">Date/Time</font></th>
<th><font face="Arial, Helvetica, sans-serif">URL</font></th>
<th><font face="Arial, Helvetica, sans-serif">Uploaded File</font></th>
<th><font face="Arial, Helvetica, sans-serif">Email / Twitter</font></th>
<th><font face="Arial, Helvetica, sans-serif"></font></th>
</tr>

<?php
$i=0;
while ($i < $num) {
$id=mysql_result($result,$i,"id");
$date=mysql_result($result,$i,"date");
$url=mysql_result($result,$i,"url");
$uploadedfile=mysql_result($result,$i,"uploadedfile");
$contact=mysql_result($result,$i,"contact");
?>

<tr><form action="reader.php" method="POST">
<td><input type="hidden" name="id" value="<? echo $id; ?>"></td>
<td><font face="Arial, Helvetica, sans-serif"><input type="checkbox" name="reader" value="Max"> Max <input type="checkbox" name="reader" value="Aaron"> Aaron</font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $date; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $url; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $uploadedfile; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $contact; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><input type="submit" value="Submit"></font></td>
</form>
</tr>

<?php
$i++;
}
?>
</body>
</html>

阅读器.php

<?php

$error=0;

$con = mysql_connect('localhost', 'root', 'root'); //Replace with your actual MySQL DB Username and Password
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("longform", $con); //Replace with your MySQL DB Name

$reader=mysql_real_escape_string($_POST['reader']); //This value has to be the same as in the HTML form file
$id=mysql_real_escape_string($_POST['id']);
$query="UPDATE submission SET reader='$reader' WHERE id='$id'";
mysql_query($query);
echo "Record Updated";
mysql_close();
?>

最佳答案

在您的表单中，您可能想要添加一个隐藏字段，即要更新的 ID。因此，对于您从数据库中提取的每一行，您将显示您希望他们能够编辑的字段，然后还包括包含对象 ID 或其他标识信息的表单 type=hidden 字段。例如:

<form>
    <input type="text" name="full_name" value="<?php echo $full_name ?>" />
    <input type="hidden" name="id" value="<?php echo $id ?>" />
</form>

关于php - 将数据添加到 MySQL 数据库中的相应条目，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4200886/

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