PHP development of simple book background management system login complete code
In this section we create a login.php file to display the complete login function code
We created the style.css file earlier and put this CSS file in the same folder. Next, call the CSS style directly.
Introduce the database public file config.php.
<?php
require_once("config.php"); //引入數(shù)據(jù)庫文件
?>
<?php
if($_POST["Submit"])
{
$username=$_POST["username"];
$pwd=$_POST["pwd"];
$code=$_POST["code"];
if($code<>$_SESSION["auth"])
{
echo "<script language=javascript>alert('驗(yàn)證碼不正確！');window.location='login.php'</script>";
?>
<?php
die();
}
$SQL ="SELECT * FROM admin where username='$username' and password='$pwd'";
$rs=mysqli_query($link,$sql);
if(mysqli_num_rows($rs)==1)
{
$_SESSION["pwd"]=$_POST["pwd"];
$_SESSION["admin"]=session_id();
echo "<script language=javascript>alert('登陸成功！');window.location='admin_index.php'</script>";
}
else
{
echo "<script language=javascript>alert('用戶名或密碼錯(cuò)誤！');window.location='login.php'</script>";
?>
<?php
die();
}
}
?>
<?php
if($_GET['tj'] == 'out'){
session_destroy();
echo "<script language=javascript>alert('退出成功！');window.location='login.php'</script>";
}
?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>圖書后臺(tái)管理系統(tǒng)登陸功能</title>
<!-- 引入CSS樣式 -->
<link rel="stylesheet" type="text/css" href="style.css"/>
</head>
<body>
<div id="top"> </div>
<form id="frm" name="frm" method="post" action="" onSubmit="return check()">
<div id="center">
<div id="center_left"></div>
<div id="center_middle">
<div class="user">
<label>用戶名：
<input type="text" name="username" id="username" />
</label>
</div>
<div class="user">
<label>密 碼：
<input type="password" name="pwd" id="pwd" />
</label>
</div>
<div class="chknumber">
<label>驗(yàn)證碼：
<input name="code" type="text" id="code" maxlength="4" class="chknumber_input" />
</label>
<img src="verify.php" style="vertical-align:middle" />
</div>
</div>
<div id="center_middle_right"></div>
<div id="center_submit">
<div class="button"> <input type="submit" name="Submit" class="submit" value=" ">
</div>
<div class="button"><input type="reset" name="Submit" class="reset" value=""> </div>
</div>
<div id="center_middle_right"></div>
</div>
</form>
<div id="footer"></div>
</body>
</html>
