Trying to connect to mysql and enter data but without clicking submit, null values will be uploaded. The following code is solved:
<!DOCTYPE html>
<html>
<head><meta charset="utf-8">
<title>input</title>
</head>
<body>
<?php
$lian= mysqli_connect('localhost','root','root','anu');//连接到anu
if($lian){
echo"连接数据库成功</br>";
}
else{
echo"连接数据库失败</br>";
}
?>
<form action="Draft2.php" method="post">
<div>姓名：<input type="text" name="name" required=""></div>
<div>就业意愿：<input type="text" name="job" required=""></div>
<div>电话：<input type="text" name="phone" required=""></div>
<input type="submit" name="1" value="保存"><!--create-->
<?php
$name = $_POST['name'];
$job = $_POST['job'];
$phone = $_POST['phone'];
$jia = "INSERT INTO draft VALUES('$name','$job','$phone')";
// if ($jia) {
// echo "添加成功·</br>";
// }
// else{
// echo "添加失败";
// }
mysqli_query($lian,$jia);
// or die(mysqli_error($lian));
mysqli_free_result($lian);
mysqli_close($lian)//断开数据库连接
?>
</form>
</body>
</html> 
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
if($_POST){
Accept value and add database
}
Line 22 starts data writing. Just add an if judgment and don’t upload if there is no data