需要文件：
login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
<title>教務處</title>
<link rel="stylesheet" href="login.css">
</head>
<body background="photo/大背景.jpg">
<div class="box1">
<div class="box2">
<form action="logincheck.php" action="main.php" method="post" name="form1">
<div class="box2-1">學號：<input type="text" name="id"></div>
<br>
<div class="box2-2">
密碼：<input type="text" name="pw">
</div>
<div class="box2-3">
<input type="submit" value="登錄" style="width: 50px; height: 30px; font-size: 16px;">
</div>
<div>
<a href="region.html"><input type="button" value="註冊" style="width: 50px; height: 30px; font-size: 16px;"></a>
</div>
</form>
</div>
</div>
</body>
</html>
logincheck.php
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<?php
include 'conn.php';
$id = $_POST['id'];
$pw = $_POST['pw'];
if(!$id){
echo "<script>alert('請輸入學號！'); history.go(-1);</script>";
exit();
}
else if(!$pw){
echo "<script>alert('請輸入密碼'); history.go(-1);</script>";
exit();
}
else if (strlen($id)!=11||!is_numeric($id)){
echo "<script>alert('學號輸入有誤'); history.go(-1);</script>";
exit();
}
$idtest = mysqli_query($conn,"select * from person where id='$id' limit 1");
if(!mysqli_fetch_array($idtest)){
echo "<script>alert('該ID不存在,請檢查！'); history.go(-1);</script>";
exit();
}
$che = mysqli_query($conn,"select * from person where id='$id' and password='$pw' limit 1");
if(mysqli_fetch_array($che)){
echo "<script>alert('登錄成功！');window.location.href='main.php'</script>";
}else{
echo "<script>alert('密碼輸入錯誤,請重新輸入！'); history.go(-1);</script>";
}
?>
</body>
</html>
login.css
* {
margin: 0;
padding: 0;
}
.box2 {
margin-left: 570px;
margin-top: 200px;
background-color: pink;
width: 380px;
height: 200px;
}
.box2-1 {
width: 400px;
height: 47px;
margin-top: 20px;
margin-left: 71px;
float: left;
}
.box2-2 {
width: 400px;
height: 47px;
margin-top: 25px;
margin-left: 71px;
float: left;
margin-bottom: 10px;
}
.box2-3 {
width: 185px;
height: 50px;
margin-left: 65px;
float: left;
}
連接數據庫用的conn.php
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<?php
$conn = mysqli_connect("localhost","root","root");
if(!$conn){
die("連接數據庫失敗：".mysqli_connect_error());
}
mysqli_select_db($conn,"test");
mysqli_query($conn,'SET NAMES UTF8');
?>
</body>
</html>
測試連接數據庫的test.php
<?php
include 'conn.php';
$sql = "select * from person where name='111'";
$result = $conn->query($sql);
if($result->num_rows>0){
while($row = $result->fetch_assoc()){
echo $row['id']." ".$row['time'];
}
}
?>
查詢數據庫
這裏建立了一個表格
<table style='text-align:left;border:solid' border="1">
<tr><td>姓名</td><td>性別</td><td>聯繫方式</td></tr>
<?php
include 'conn.php';
$sql = "select * from class where id='123456789'";
$re = mysqli_query($conn,$sql);
$num = mysqli_num_rows($re);
for($i=0;$i<$num;$i++){
$row = mysqli_fetch_assoc($re);
$name = $row['membername'];
$gender = $row['gender'];
$tel = $row['tel'];
echo "<tr><td>$name</td><td>$gender</td><td>$tel</td><tr>";
}
?>
</table>
查詢結果如下：
