哪里获取到$_SESSION["auth"]值?
解决方案 »
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$post=$_GET;
else
$post=$_POST;if(!empty($_GET['forward'])&&strpos($_GET['forward'],'script')>0)
header("Location:login.php");//全if(!empty($post["action"])&&$post["action"]=="submit")
{
include_once("includes/global.php");
include_once("includes/smarty_config.php");
include_once("config/reg_config.php");
if(strtolower($_SESSION["auth"])!=strtolower($post["randcode"])&&empty($post['first_index'])&&empty($post['connect_id']))
{
header("Location: login.php?erry=-3");//证
exit();
}
直接访问login.php页面$_SESSION["auth"]会为空,如果是从主页访问然后到登录页面$_SESSION["auth"]就会得到验证码的值
直接进入本身就不会有验证码,因为不是提交过来的
而且我对你的问题理解有点歧义...你是说第一次访问login页面想获取到session,还是说第一次提交验证码时获取不到session?
另外验证码的url最好加个随机数防止缓存,包括js换验证码图片的那个函数
<img onclick="get_randfunc(this);" src='<{$config.weburl}>/includes/rand_func.php?{time()}'/>改成这样看看。
<?php
include_once("global.php");
//===============================
session_start();
$_SESSION['auth'] = $randcode;
class ValidationCode
{
private $width,$height,$codenum;
public $checkcode; //产生的验证码
private $checkimage; //验证码图片
private $disturbColor = ''; //干扰像素
function ValidationCode($width='80',$height='20',$codenum='4')
{
$this->width=$width;
$this->height=$height;
$this->codenum=$codenum;
}
function outImg()
{
//输出头
$this->outFileHeader();
//产生验证码
$this->createCode();
//产生图片
$this->createImage();
//设置干扰像素
$this->setDisturbColor();
//往图片上写验证码
$this->writeCheckCodeToImage();
imagepng($this->checkimage);
imagedestroy($this->checkimage);
}
private function outFileHeader()
{
header ("Content-type: image/png");
}
private function createCode()
{
$this->checkcode = strtoupper(substr(md5(rand()),0,$this->codenum));
}
private function createImage()
{
$this->checkimage = @imagecreate($this->width,$this->height);
$back = imagecolorallocate($this->checkimage,255,255,255);
$border = imagecolorallocate($this->checkimage,0,0,0);
imagefilledrectangle($this->checkimage,0,0,$this->width - 1,$this->height - 1,$back); // 白色底
imagerectangle($this->checkimage,0,0,$this->width - 1,$this->height - 1,$border); // 黑色边框
}
private function setDisturbColor()
{
for($i=0;$i<=200;$i++)
{
$this->disturbColor = imagecolorallocate($this->checkimage, rand(0,255), rand(0,255), rand(0,255));
imagesetpixel($this->checkimage,rand(2,128),rand(2,38),$this->disturbColor);
}
} private function writeCheckCodeToImage()
{
for ($i=0;$i<$this->codenum;$i++)
{
$bg_color = imagecolorallocate ($this->checkimage, rand(0,255), rand(0,128), rand(0,255));
$x = rand(0,7)+floor($this->width/$this->codenum)*$i;
$y = rand(0,$this->height-15);
imagechar ($this->checkimage, rand(5,8), $x, $y, $this->checkcode[$i], $bg_color);
}
}
function __destruct()
{
unset($this->width,$this->height,$this->codenum);
}
}
//===============================
$width=$_GET['w']?$_GET['w']:"80";
$height=$_GET['h']?$_GET['h']:"33";
$image = new ValidationCode($width,$height,'4');
$image->outImg();
$_SESSION["auth"] = $image->checkcode;
?>
第75、76行的
$width=$_GET['w']?$_GET['w']:"80";
$height=$_GET['h']?$_GET['h']:"33";
改为
$width = isset($_GET['w']) ? $_GET['w'] : "80";
$height = isset($_GET['h']) ? $_GET['h'] : "33";
需要的时候直接调用a方法,记得将类的$_SESSION['auth'] = $randcode;去掉。