php登录注册页面（新手）

创建时间：2016-11-12 投稿人：浏览次数：489

php小白练手作业。代码有待完善。

需要完善的点：

1.我的验证码不能区分大小写，主要原因是不会将js中的数据传输到php中。

2.其中html部分是上学期写的代码，有些部分也还需要完善，有的地方有冗余。

3.由于是一边学一边做的，有一些传值没有用到，之后要改进。

4.不会在php中让ID自增，导致每次得自己输值进去。

欢迎各位高手指点！在下感激不尽！

conn.php:

<?php
$conn = mysqli_connect("localhost","root","root","db_user")or die("数据库连接失败！".mysql_error());
mysqli_query($conn,"set names utf8");
?>

load.php:

<html>
    <head>
        <title>用户登录</title>
        <style type="text/css">
           .container{
               width:1024px;
               height:768px;
                 margin:0 auto;
               background-image:url(image/load.jpg);
               background-repeat:no-repeat;
               background-position:top center;
               background-size:100%;
           }
        </style>
        <style type="text/css">
       .code{
       font-family:Arial,宋体;
       font-style:italic;
       color:green;
       border:0;
       letter-spacing:3px;
       font-weight:bolder;
       }
       .unchanged {
       border:0;
       }
        </style>
       <script language="javascript" type="text/javascript">
       var code ;
       function createCode(){
       code = new Array();
       var codeLength = 4;
       var checkCode = document.getElementById("checkCode");
       checkCode.value = "";

       var selectChar = new Array(2,3,4,5,6,7,8,9,"A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","S","T","U","V","W","X","Y","Z");

       for(var i=0;i<codeLength;i++) {
       var charIndex = Math.floor(Math.random()*32);
        code +=selectChar[charIndex];
       }
       if(code.length != codeLength){
       createCode();
       }
       checkCode.value = code;
       }

       function validate () {
       var inputCode = document.getElementById("input1").value.toUpperCase();

       if(inputCode.length <=0) {
           alert("请输入验证码！");
        return false;
       }
       else if(inputCode != code ){
        alert("验证码输入错误！");
       createCode();
        return false;
       }
       else {
        alert("验证码输入正确！");
        return true;
       }
       }
       </script>
       <script type = "text/javascript">
           function checkform(form){
               if(form.user.value == ""){
                   alert("请输入用户名!");
                   form.user.focus();
                   return false;
                   }
               if(form.pwd.value == ""){
                   alert("请输入密码!");
                   form.user.focus();
                   return false;
                   }
               if(form.yanzheng.value == ""){
                   alert("请输入验证码!");
                   form.user.focus();
                   return false;
                   }
           }
       </script>
    </head>
    <body onLoad="createCode();">
       <div class="container">
        <br/><br/><br/><br/>
        <h3><strong><center>  用户登录</center></strong></h3>
        <center>
        <form action="loadpost.php" id="form1" name="form1" method="post" style="width:200px" onsubmit="return checkform(form1)">
        <fieldset>
        <table width="320" border="0" cellpadding="6" align="center">
        <legend>在线登录</legend>
            <tr>
                <td align="right">账号：</td>
                <td><input type="text" name="user"/></td>
            </tr>
            <tr>
                <td align="right">密码：</td>
                <td><input type="password" name="pwd"/></td>
            </tr>
            <tr>
               <td align="right">验证码：</td>
               <td ><input type="text" id="input1" name="yanzheng"/></td>
             </tr>
            <tr>
               <td align="right"></td>
               <td align="left"><input type="text" name="yanzhengma" id="checkCode" class="code" onClick="createCode()" /><a href="#" onClick="createCode()">看不清楚</a></td>
           </tr>
           <tr>
                <td colspan="2" align="center">
                 <input type="submit" value="登录">
                </td>
            </tr>
        </table>
        </fieldset>
        </form>
        </center>
        </div>
    </body>
</html>

loadpost.php:

   <?php
       session_start();
        $user = $_POST["user"];
        $pwd = $_POST["pwd"];
        $yanzheng = $_POST["yanzheng"].toUpperCase();
       $yanzhengma = $_POST["yanzhengma"];
       if($yanzheng != $yanzhengma){
           echo "<script>alert("验证码有误,请重新输入!");location="load.php";</script>";
       }else{
        include_once("conn.php");
        $sql = mysqli_query($conn,"select * from tb_user where user="".$user.""and pwd="".$pwd.""");
        $num = mysqli_num_rows($sql);
        if($num>0){
               $_SESSION["user"]=$user;
               $_SESSION["time"]=time();
               echo "<script>alert("登陆成功!");location="show.php";</script>";
        }else{
                echo "<script>alert("账号或密码不正确!");location = "load.php";</script>";
             }
       }
?>

zhuce.php:

zhucepost.php:

show.php:

<?php
   if(!isset($_SESSION["time"])){
       echo "<script>alert("您无权限查看本页面，请先登录！";location = "load.php";</script>";
   }elseif(time() - $_SESSION["time"]<600){
       $_SESSION["time"] = time();
   }else{
       echo "<script>alert("登陆超时，请重新登录!");location="load.php";</script>";
   }
?>
<p>欢迎你登录成功！</p>

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