PHP-用户登录注册接口

新版本的PHP中mysql_conntent()【regcheck.php】等函数改成了mysqli_conntent()【logincheck.php】，参数也有所变化。但不影响正常使用。出现警告时用函数

error_reporting(0)隐藏警告

登录-login.php： <form action="logincheck.php" method="post">
用户名：<input type="text" name="username" />
<br />
密码：<input type="password" name="password" />
<br />
<input type="Submit" name="Submit" value="登陆" />

<a href="register.php">注册</a>
</form>登录检测-logcheck.php：
<?php
if(isset($_POST["Submit"]) && $_POST["Submit"] == "登陆")
{
$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
{
$con = mysqli_connect("localhost","root","root");
mysqli_select_db($con ,"vt");
mysqli_query($con,"set names 'gbk'");
$sql = "select username,password from user where username = '$_POST[username]' and password = '$_POST[password]'";
$result = mysqli_query($con ,$sql);
$num = mysqli_num_rows($result);
if($num)
{
$row = mysqli_fetch_array($result,MYSQLI_NUM); //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>";
}

?>

注册-register.php:
<form action="regcheck.php" method="post">  
    用户名：<input type="text" name="username"/>  
    <br/>  
    密　码:<input type="password" name="password"/>  
    <br/>  
    确认密码：<input type="password" name="confirm"/>  
    <br/>  
    <input type="Submit" name="Submit" value="注册"/>  
</form>


注册检测-regcheck.php:
<?php
error_reporting(0);
if(isset($_POST["Submit"]) && $_POST["Submit"] == "注册")
{
$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","root"); //连接数据库
mysql_select_db("vt"); //选择数据库
mysql_query("set names 'gdk'"); //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>";
}
?>