Question

我正试图创造一个小问题。我写了php查询来删除获取的数据。但我不知道在ID =＆＃34;＆＃34;之后要写什么？在删除查询中。我的代码在下面给出

索引文件

<html>
    <head>
    <title>crud system</title>
    </head>
    <body>

    <?php include 'connect.php';?>

    <form method="post" action="postdata.php">
    username:
    <input type="text" name="name">
    <input type="submit" name="submit">
</form>

</body>

</html>

postdata.php

//postdata.php
<?php 
mysql_connect('localhost','root','') or die("cannot to database");
mysql_select_db('users');

$name = $_POST['name'];
$sql="INSERT into add_data (name) values('$name')";
$query=mysql_query($sql);

if(!$query){

    echo"data entrance failed".mysql_error();
}
else{
    echo "data added successfully !";
}
?>

fetchint data select.php

<!DOCTYPE html>
<html>
<body>

<?php
include 'connect.php';
$result = mysql_query("SELECT * FROM add_data");


while($row = mysql_fetch_array($result)) {

echo $row["name"]."<a href=\"delete.php\">delete</a>"."<br/>";
 }
?>  

</body>
</html>

delete.php

<?php
include_once 'connect.php';  
mysql_query("DELETE FROM add_data WHERE **id=2"**);
header('location:select.php');

?>

现在在删除文件中我不想写id = 2因为它只会删除第二条记录我要删除我点击的内容。

Answer 1

为delete.php脚本提供id并使用$ _GET检索它，然后使用检索到的id

使用where子句执行删除

echo $row["name"]."<a href=\"delete.php?id=".$row["id"]."\">delete</a>"."<br/>";

在delete.php中

$ id = isset（$ _ GET ['id']）？（int）$ _ GET ['id']）：0;

Answer 2

在select.php中

 while($row = mysql_fetch_array($result)) 
 {
    echo $row["name"].'<a href="delete.php?del_id='.$row["id"].'">Delete</a><br/>';
 }

在delete.php中

$del_id = '';
if(!empty($_GET['del_id']))
{
    $del_id = $_GET['del_id'];
    include_once 'connect.php';  
    mysql_query("DELETE FROM add_data WHERE id = '$del_id' ");
    header('location:select.php');
}

我想删除数据库中的记录使用php我点击哪条记录

2 个答案: