php - MySQL 连接不工作 Ubuntu？

Question

我在 Ubuntu 上安装了 lamp，一切正常在数据库中，它也不会在 mysql 连接上给出错误。 使用POST方法发送表单数据

<form action="form.php" method="POST">

        <label>Email:</label>
        <input type="text"  name="name">
        <label>Password</label>
        <input type="password" name="pass">
      </form>

这是php代码

<?php

ini_set('display_errors',1); 
error_reporting(E_ALL);

echo "hello I am here !<br/>";


$con=mysqli_connect("localhost","root","123","login");

if (mysqli_connect_errno($con))
    {
echo "Failed to connect to MySQL: " . mysqli_connect_error();

    }



$name = $_POST['name'];
$password = $_POST['pass'];
echo " Name: ".$name." <br/>Password: ".$password; 
mysqli_query($con,"INSERT INTO login_data (username, password) VALUES ('". $name ."', '". $password ."')");
//it doesnt insert the data 
//how do i check the error of that query ? 
mysqli_close($con);
?>  

帮助!

Answer 1

$sql="INSERT INTO login_data(username,password) values(".$_POST['name'].",".$_POST['password'].")";

mysqli_query(mysqli $link, string $query)

先连接，再查询。并使用 mysqli

$a=mysqli_query($con, $sql );