php做的主页验证码

来源：互联网发布：下载数据恢复编辑：程序博客网时间：2024/05/17 01:30

这是做的一个主页，有点简陋，但还算不错。。

<body>
<form name="form1"  method="post"  action="check.php" >
  <table  border="1" align="center" cellpadding="0" cellspacing="0" >
<tr>
   <td width="70" align="right"><span class="STYLE4">用户名</span></td>
   <td width="100" align="left"><input type="text" name="username" id="username"></td>
</tr>
<tr>
   <td align="right"><span class="STYLE4">密码</span></td>
   <td align="left"><input type="password" name="password" id="password"></td>
</tr>
<tr>
  <td width="70" align="right"><span class="STYLE4">验证码</span></td>
  <td>

<input type="text" name="input1" > <img src="code.php"><hr>
</td>

</tr>
<tr>
   <td align="right"> </td>
   <td align="left"><input type="submit" name="submit" value="登录" id="submit">
      <input type="reset" name="reset" id="reset" /></td>
</tr>
  </table>
</form>
</div>
</body>

这里面的check.php
<?php
session_start();
include('conn.php');
[url=mailto

a=@strtoupper($_POST[]$a=@strtoupper($_POST["input1[/url]"]); //接受输入的验证码
[url=mailto

b=@strtoupper($_SESSION[]$b=@strtoupper($_SESSION["code"]);//[/url]接受验证码
if($_POST['username']!=""&&$_POST['password']!=""){
//定义sql
$sql="SELECT * FROM admin where username='".$_POST['username']."' and password='".$_POST['password']."'";//判断用户名及密码不为空
$rs=mysql_query($sql);
if(mysql_num_rows($rs)){


  $_SESSION['user']=$_POST['username'];

if($a==$b){    //用户名及密码判断之后判断验证码
?>
<script type="text/javascript">
  
  </script>
<?php
}else{
?>
<script type="text/javascript">
alert ("验证码错误！");location="index.php";
</script>
  <?php
  }
  ?>

  <?php
}else{
  ?>
  <script type="text/javascript">
alert("登陆失败，用户名或者密码错误！");
location="index.php";
  </script>
  <?php

}

}else {
?>
<script type="text/javascript">
alert("用户名或者密码不能为空！~");
location="index.php";
</script>
<?php
}
?>