php用户登录代码

2024-05-04 23:06:18

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一款讲得非常详细的登录代码，对php入门者有很大的帮助，有需要的朋友可以免费查看,效果图如下:

index.php,代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gbk" />

<title>系统登录</title>

<link href="css.css" rel="stylesheet" type="text/css" />

</head>

<body>

<div id="box">

  <div id="denglu">

  <div id="pic"> 系统后台登陆</div>

    <form action="check.php" method="post">

      <p>用户名：

        <input type="text" name="name" id="name" />

      <span class="must">*</span></p>

      <p>密  码：

        <input name="password" type="password" id="password" />

      <span class="must">*</span></p>

      <p>验证码：

        <input name="check" type="text" id="check" size="8" />

        <img src="piccheck.php" /> <span class="must">*</span></p>

      <p class="form_button">

        <input type="submit" name="sub" id="sub" value="登陆" />

        <input type="reset" name="unsub" id="unsub" value="取消" />

      </p>

    </form>

  </div>

</div>

</body>

</html>

数据库连接connect.php,代码如下:

<?php

$connect=mysql_connect("localhost","root","")or die("服务器连接失败");

mysql_select_db("test",$connect)or die("没有建立相应的数据库");

$sql="select * from admin";

?>

图片验证码 piccheck.php,代码如下:

<?php

/*

* Created on 2011-8-10

*

* To change the template for this generated file go to

* Window - Preferences - PHPeclipse - PHP - Code Templates

*/

session_start();

$code=rand(0,9).dechex(rand(10,15)).rand(0,9).dechex(rand(10,15));

$_SESSION[pic]=$code;

$image=imagecreatetruecolor(50,18);

$color=imagecolorallocate($image,0,0,0);//第一次使用调色板，会设为背景颜色

$colortext=imagecolorallocate($image,rand(100,255),rand(100,255),rand(100,255));

imagestring($image,10,rand(1,15),rand(1,5),$code,$colortext);

imagegif($image);

?>

css.css文件,代码如下:

@charset "utf-8";

/* CSS Document */

body {

background-color: #9CF;

text-align: left;

}

#denglu {

width: 400px;

margin-top: 0px;

margin-right: auto;

margin-bottom: 0px;

margin-left: auto;

background-image: url(images/login.gif);

background-repeat: no-repeat;

height: 320px;

text-indent: 6px;

}

#box #denglu form {

position: relative;

top: 50px;

left: 10px;

width: 92%;

}

.must {

color: #F00;

font-size: 12px;

}

#box #denglu #pic {

background-image: url(images/dot1.gif);

background-repeat: no-repeat;

height: 20px;

width: 100px;

font-size: 12px;

color: #F00;

text-align: left;

line-height: 18px;

left: 10px;

top: 30px;

position: relative;

}