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10-28小结

2013-10-28 20:34 197 查看

<?php
class db{
private $hostname;
private $dbname;
private $username;
private $password;
private $recourse;

function __construct($hostname,$dbname,$username,$password){
$this->hostname=$hostname;
$this->dbname=$dbname;
$this->username=$username;
$this->password=$password;
$this->connect();

}

function connect(){
$this->recourse=mysql_connect($this->hostname,$this->username,$this->password);
mysql_select_db($this->dbname);
mysql_query('set names utf8');

}

function getrow($sql){
$result = mysql_query($sql);
return mysql_fetch_assoc($result);//从结果集中取得一行作为关联数组
}

function __destruct(){
mysql_close($this->recourse);

}
}

<?php
class Captcha{
private $width;		//验证码的宽度
private $height;    //验证码的高度
private $strNum;    //验证码字符的数量
private $image;
private $disTurbNum;

public function __construct($width,$height,$strNum){
$this->width = $width;
$this->height = $height;
$this->strNum = $strNum;
$this-> disTurbNum = $this->width * $this->height/50; //像素密度
}

public function showImg(){
//创建矩形框(背景颜色)
$this->createBg();
//设置干扰元素(像素点、线条)
$this->setDisturb();
//输出文字到矩形框
$this->outPutStr();
//输出\保存图像
$this->outPutImg();
}
function createBg(){
//创建画布
$this->image = imagecreatetruecolor($this->width,$this->height);
//分配画笔颜色
$bgColor =imagecolorallocate($this->image,mt_rand(50,255),mt_rand(50,255),mt_rand(50,255));
//填充颜色
imagefill($this->image,0,0,$bgColor);
//给背景创建一个边框
$borderColor = imagecolorallocate($this->image,0,0,0);
imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
}
//设置干扰元素
private function setDisturb(){
//像素点
for($i=0;$i<$this->disTurbNum;$i++){
$pxColor = imagecolorallocate($this->image,mt_rand(100,225),mt_rand(100,225),mt_rand(100,225));
imagesetpixel($this->image,mt_rand(1,$this->width-2),mt_rand(1,$this->height-2),$pxColor);
}
//线条
for($j=0;$j<20;$j++){
$lineColor = imagecolorallocate($this->image,mt_rand(50,200),mt_rand(50,200),mt_rand(50,200));
imageline($this->image,mt_rand(0,$this->width),mt_rand(0,$this->height),mt_rand(0,$this->width),mt_rand(0,$this->height),$lineColor);
}
}

private function outPutStr(){
//a-z   A-Z   0-9
$lower_str = range('a','z');   //获得 从a-z之间的所有的单元
$upper_str = range('A','Z');
$num = range(0,9);
//把这些数组合并
$new_all = array_merge($lower_str,$upper_str,$num);
//随机获得几个数组下标
$keys = array_rand($new_all,$this->strNum);
$str = '';
//循环遍历下标,找到对应的元素
foreach($keys as $value){
$str .= $new_all[$value];
}
$strColor = imagecolorallocate($this->image,255,255,255);
imagestring($this->image,5,50,3,$str,$strColor);
//通常是保存到session
$_SESSION['str'] = $str;
}

function getstr($userstr){
if($userstr== $_SESSION['str']){
return true;
}else{
return false;
}
}

private function outPutImg(){
header('Content-Type:image/png');
imagepng($this->image);
}

}

<?phpsession_start();header('Content-Type:text/html;charset=utf-8');if(isset($_GET['act'])){require 'includes/Captcha.class.php';$captcha=new Captcha(145,20,5);$captcha->showImg();}//验证验证码if(isset($_POST['sub'])){require 'includes/Captcha.class.php';$captcha=new Captcha(145,20,5);$userstr=$_POST['captcha'];$result=$captcha->getstr($userstr);if($result){//验证名字//验证密码$username=$_POST['username'];$password=$_POST['password'];require 'includes/db.class.php';$db=new db('localhost','ecshoptest','root','');$sql="select *from user where username='$username' and password='$password' ";$row=$db->getrow($sql);//var_dump($row);//if($row){header('location:index1.php');}else{echo'用户名或密码不正确，请重新输入';}is_array($row)?header('location:index1.php'):$alert='用户名或密码不正确，请重新输入';//三目运算符判断返回值是否为数组如果不是给alert赋值}else{ echo redirect_url('验证码错误','privilege.php');}}function redirect_url($message,$url){if($message){$alert_str = "alert('$message')";}else{$alert_str = '';}echo <<<STR<script type="text/javascript">$alert_strwindow.location.href="$url";</script>STR;}?><html xmlns="http://www.w3.org/1999/xhtml"><head><title>ECSHOP 管理中心</title><meta content="text/html; charset=utf-8" http-equiv="Content-Type"><link type="text/css" rel="stylesheet" href="styles/general.css"><link type="text/css" rel="stylesheet" href="styles/main.css"><style type="text/css">body { color: white;}</style><script src="../js/utils.js" type="text/javascript"></script><script src="js/validator.js" type="text/javascript"></script><script language="JavaScript"></script></head><body style="background: #278296"><form onsubmit="return validate()" name="theForm" action="privilege.php" method="post"> <table cellspacing="0" cellpadding="0" align="center" style="margin-top: 100px"> <tbody><tr> <td><img width="178" height="256" border="0" alt="ECSHOP" src="images/login.png"></td> <td style="padding-left: 50px"> <table> <tbody><tr> <td>管理员姓名：</td> <td><input type="text" name="username"></td><?if(isset($alert))echo $alert ?> </tr> <tr> <td>管理员密码：</td> <td><input type="password" name="password"></td> </tr> <tr> <td>验证码：</td> <td><input type="text" name="captcha"></td> </tr> <tr> <td align="right" colspan="2"><img width="145" height="20" border="1" title="看不清？点击更换另一个验证码。" style="cursor: pointer;" onclick="this.src='privilege.php?act=captcha&'+Math.random()" alt="CAPTCHA" src="privilege.php?act=captcha"> </td> </tr> <tr><td colspan="2"><input type="checkbox" id="remember" name="remember" value="1"><label for="remember">请保存我这次的登录信息。</label></td></tr> <tr><td> </td><td><input type="submit" class="button" name="sub" value="进入管理中心"></td></tr> <tr> <td align="right" colspan="2">» <a style="color:white" href="../">返回首页</a> » <a style="color:white" href="get_password.php?act=forget_pwd">您忘记了密码吗?</a></td> </tr> </tbody></table> </td> </tr> </tbody></table> <input type="hidden" value="signin" name="act"></form><script language="JavaScript"></script></body></html>

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