需求
- PHP連接數據庫
- POST參數數據控制ID刪除數據
- 查詢剩下的數據
php連接數據庫
//config.php文件內容
$database = "xx";
$dataname = "root";
$datapasswd = "xxx";
$datalocal = "localhost:3306";
//$dataport = "3306";
$con = mysqli_connect($datalocal,$dataname,$datapasswd,$database);
if(!$con){
echo "數據庫連接異常";
}
//設置查詢數據庫編碼
mysqli_query($con,'set names utf8');
POST表單
<html>
<center>
<p>需要刪除的數據</p>
<form action="del.php" method="post">
id: <input type="text" name="id">
<input type="submit" value="提交">
</form>
</center>
</html>
PHP刪除代碼
在做寫代碼的時候一定要寫清楚不然整個庫記錄全部刪除
<?php
//接收參數
$id = $_POST['id'];
//插入數據庫
//SQL查詢語句要注意
$sql = "delete from user where id=$id";
$result = mysqli_query($con,$sql);
if(!$result){
echo "刪除失敗</br>";
}
else{
echo "</hr><center>刪除數據成功</center></br>";
}
//查詢數據庫
$query = 'select * from user';
$result1 = mysqli_query($con,$query);
//函數返回結果集中行的數量
if(mysqli_num_rows($result1)>0){
//mysqli_fetch_array以數組的形式返回，關聯數組
while($row = mysqli_fetch_array($result1)){
echo
"<center>
<table>
<tr>
<th>賬號</th>
<th>密碼</th>
</tr>
<tr>
<td>".$row['id']."</td>
<td>".$row['name']."</td>
<td>".$row['password']. "</td>
</tr>
</table>
</center>";
}
}
//關閉數據庫
mysqli_close($con);
?>