利用php和mysql实现注册登录页面

来源：互联网发布：js设置input可以编辑编辑：程序博客网时间：2024/04/30 08:47

login.php:
<form action="http://1491r81p69.51mypc.cn:29362/login/logincheck.php" method="post">

username:<input type="text" name="username" />
<br />
password:<input type="password" name="password" />
<br />
<input type="submit" name="submit" value="login" />

<a href="http://1491r81p69.51mypc.cn:29362/login/register.php">register</a>

</form>

logincheck.php:

<?php
header("Content-Type:text/html;charset=gb2312");

if(isset($_POST["submit"]) && $_POST["submit"] == "login")
{
$user = $_POST["username"];
$psw = $_POST["password"];
if($user == "" || $psw == "")
{
echo "<script>alert('请输入用户名或密码！'); history.go(-1);</script>";
}
else
{
@mysql_connect("localhost","root","");
mysql_select_db("car");
mysql_query("set names 'utf8'");
$sql = "select username,password from user where username = '$_POST[username]' and password = '$_POST[password]'";
$result = mysql_query($sql);
$num = mysql_num_rows($result);
if($num)
{
$row = mysql_fetch_array($result); //将数据以索引方式储存在数组中
echo $row[0];
}
else
{
echo "<script>alert('用户名或密码不正确！');history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('提交未成功！'); history.go(-1);</script>";
}

?>

<form action="http://1491r81p69.51mypc.cn:29362/login/regcheck.php" method="post">

username：<input type="text" name="username"/>
<br/>
password:<input type="password" name="password"/>
<br/>
confiug password：<input type="password" name="confirm"/>
<br/>
<input type="Submit" name="Submit" value="register"/>
</form>

registercheck.php:

<?php
header("Content-Type:text/html;charset=gb2312");
if(isset($_POST["Submit"]) && $_POST["Submit"] == "register")
{
$user = $_POST["username"];
$psw = $_POST["password"];
$psw_confirm = $_POST["confirm"];
if($user == "" || $psw == "" || $psw_confirm == "")
{
echo "<script>alert('请确认信息完整性！'); history.go(-1);</script>";
}
else
{
if($psw == $psw_confirm)
{
@mysql_connect("localhost","root",""); //连接数据库
mysql_select_db("car"); //选择数据库
mysql_query("set names 'utf8'"); //设定字符集
$sql = "select username from user where username = '$_POST[username]'"; //SQL语句
$result = mysql_query($sql); //执行SQL语句
$num = mysql_num_rows($result); //统计执行结果影响的行数
if($num) //如果已经存在该用户
{
echo "<script>alert('用户名已存在'); history.go(-1);</script>";
}
else //不存在当前注册用户名称
{
$sql_insert = "insert into user (username,password,phone,address) values('$_POST[username]','$_POST[password]','','')";
$res_insert = mysql_query($sql_insert);
//$num_insert = mysql_num_rows($res_insert);
if($res_insert)
{
echo "<script>alert('注册成功！'); history.go(-1);</script>";
}
else
{
echo "<script>alert('系统繁忙，请稍候！'); history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('密码不一致！'); history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('提交未成功！'); history.go(-1);</script>";
}
?>

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