写了一个简单的收集信息的页面，页面上只有一个表单，用户将数据写入表单并提交之后，转到另一个页面并且将数据保存的MySQL中。
信息统计页面
<html>
<head>
<meta charset="utf-8">
<meta content="width=device-width,user-scalable=no" name="viewport">
<title>form</title>
<style type="text/css">
.p1{
color: black;
font-size: 30px;
}
#box1{
background-color: #f1861e;
width: 75%;
height: 60%;
float: 0 auto;
text-align: center;
}
#input1{
width: 100px;
height: 50px;
margin: 20px;
}
#input0{
width: 200px;
height: 30px;
}
</style>
</head>
<body>
<div style="text-align: center;">
<div id="box1">
<form action="welcome.php" method="post">
<b class="p1">姓名: </b><input type="text" name="name" id="input0"><br>
<b class="p1">学号: </b><input type="text" name="num" id="input0"><br>
<b class="p1">班级：</b><input type="text" name="classl" id="input0"><br>
<input type="submit" value="提交" id="input1">
</form>
</div>
</div>
</body>
</html>
提交后跳转页面
phpmyadmin页面
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<?php echo $_POST["num"]; ?><br>
欢迎<?php echo $_POST["classl"]; ?>
<?php echo $_POST["name"]; ?>！
<?php
$file_path = "info.txt";
if(file_exists($file_path)){
$fp = fopen($file_path, "w");
$str = $_POST["num"] . PHP_EOL . $_POST["classl"] .PHP_EOL . $_POST["name"];
fwrite($fp, $str);
}
fclose($fp);
?>
<?php
$mydbhost = "localhost";
$mydbuser = "root";
$mydbpass = 'helloworld';
$conn = mysqli_connect($mydbhost, $mydbuser, $mydbpass);
if(! $conn){
die("connect error: " . mysqli_error($conn));
}
mysqli_select_db( $conn, 'person');
$sql="INSERT INTO student (name, Sno, class)
VALUES
('$_POST[name]','$_POST[num]','$_POST[classl]')";
$retval = mysqli_query($conn, $sql);
if(! $retval){
die("create error" . mysqli_error($conn));
}
mysqli_close($conn);
?>
</body>
</html>