调试易

<?php
$user=$_POST['psd'];
$psd=$_POST['user'];

//连接数据库
$con=mysqli_connect("localhost","root","root")

//连接判断
or die("could not connect to the database:".mysqli_connect_error());

//设置字符集
mysqli_set_charset($con,'utf8');

//选择数据库
mysqli_select_db($con,'mysql')
or die("Could not select examples".mysqli_connect_errno());

//插入数据
$sql="INSERT INTO password(user,psd) VALUES('{$user}','{$psd}')"
or die("插入出错".mysqli_connect_error());

//构建查询语句
$query="select * from password" or die("查询错误".mysqli_connect_error());//输出from后面的所有数据

//发送sql语句
$mysql=$mysql_query($con,$query) or die("发送失败".mysqli_connect_error());

//执行查询
$result=mysqli_fetch_array($con,$mysql)
or die("could not to the database".mysqli_connect_errno()); //关闭连接
mysqli_close($con);
?>网页反馈为发送错误