Question

我有一个像这样的html表单：

<form method="post" action="input.php">
<label for="name">NAME</label>
<input type="text" name="name" size="20">
<label for="address">ADDIE</label>
<input type="text" name="address" size="40">
<input type="submit" name="submit" value="Send">

我有：

<?php

mysql_connect("localhost","formuser","password") or die(mysql_error());
mysql_select_db("formpractice") or die(mysql_error());


$name = $_POST['name'];
$address = $_POST['address'];


$query = "INSERT INTO Users(name, address) VALUES ('$name', '$address')";

$qresult = mysql_query($query);

if ($qresult) {
    echo "Success";
} else {
    echo "Failed to submit";
}

?>

我正在尝试这个：

<form method="post" action="input.php">
<label for="name">NAME</label>
<input type="text" name="name" size="20">
<label for="address">ADDIE</label>
<input type="text" name="address" size="40">
<input type="submit" name="submit" value="Send">
// Here is where I get trouble. How do I get this button to execute a delete statement?
<input type="submit" name="Delete" value="Delete">

Answer 1

<form action="something.php" method=post">
Name: <input type=text name="name">
Price: <input type=text name="othername">
<input type=submit value="remove this from the database on the web server">
</form>

添加此php：

<?=
$name=$_POST['name'];
$price=$_POST['price'];

$sql = "Delete * from (whatever) VALUES ('$name','$othername')";
$result = mysql_query($sql); 
?>

Answer 2

<form method="post" action="input.php">
<label for="name">NAME</label>
<input type="text" name="name" size="20">
<label for="address">ADDIE</label>
<input type="text" name="address" size="40">
<input type="submit" name="submit" value="Send">
// Here is where I get trouble. How do I get this button to execute a delete statement?
<input type="submit" name="Delete" value="Delete">

无论你在“名称”中输入什么内容，都会在用于表单的方法中发送（在本例中为POST）;你可以在全局变量$ _POST中找到它。为了使该按钮“删除”，您需要在某处（在这种情况下，它将在您的forgm标记的“action”属性中的metnioned的.php文件中），php代码执行使用您在表单中传递的信息（名称和地址）删除。

如果您要保留相同的表单，这意味着您将使用两个提交按钮，那么您的PHP代码必须以某种方式确定您希望它执行的操作（输入或删除），这是哪里您将使用输入标记的name属性。

<?php
     if($_POST['Delete']{ 
         //connect to database, issue query, close database
     }

     if($_POST['submit']{
           //the code you had for sending the data
     }
?>

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如何从mysql数据库中删除

2 个答案: