找过很多贴子,也没看到弄明白是怎么回事,
文件是login.php,smarty->display('login.tpl')在login.tpl中调用<img src="../configs/checkcode.php" border="1"/>,图片显示正常,checkcode代码如下
-----------------------------------------------
<?php
session_start();
class CCheckCodeFile
{
//验证码位数
var $mCheckCodeNum = 4;//产生的验证码
var $mCheckCode = '';//验证码的图片
var $mCheckImage = '';//干扰像素
var $mDisturbColor = '';//验证码的图片宽度
var $mCheckImageWidth = '80';//验证码的图片宽度
var $mCheckImageHeight = '20';/**
*
* @brief 输出头
*
*/
function OutFileHeader()
{
header ("Content-type: image/png");
}/**
*
* @brief 产生验证码
*
*/
function CreateCheckCode()
{
$this->mCheckCode = strtoupper(substr(md5(rand()),0,$this->mCheckCodeNum));
return $this->mCheckCode;
}/**
*
* @brief 产生验证码图片
*
*/
function CreateImage()
{
$this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
imagecolorallocate ($this->mCheckImage, 200, 200, 200);
return $this->mCheckImage;
}/**
*
* @brief 设置图片的干扰像素
*
*/
function SetDisturbColor()
{
for ($i=0;$i<=128;$i++)
{
$this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
}
}/**
*
* @brief 设置验证码图片的大小
*
* @param $width 宽
*
* @param $height 高
*
*/
function SetCheckImageWH($width,$height)
{
if($width==''||$height=='')return false;
$this->mCheckImageWidth = $width;
$this->mCheckImageHeight = $height;
return true;
}/**
*
* @brief 在验证码图片上逐个画上验证码
*
*/
function WriteCheckCodeToImage()
{
for ($i=0;$i<=$this->mCheckCodeNum;$i++)
{
$bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
$x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
if($x==0)$x=5; //first words
$y = rand(0,$this->mCheckImageHeight-15);
imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
}
}/**
*
* @brief 输出验证码图片
*
*/
function OutCheckImage()
{
$this ->OutFileHeader();
$this ->CreateCheckCode();
$this ->CreateImage();
$this ->SetDisturbColor();
$this ->WriteCheckCodeToImage();
$_SESSION["vCode"] = $this->mCheckCode;
imagepng($this->mCheckImage);
imagedestroy($this->mCheckImage);
}
}
$c_check_code_image = new CCheckCodeFile();
$c_check_code_image ->SetCheckImageWH(70,23);//设置显示验证码图片的尺寸
$c_check_code_image ->OutCheckImage();?>----------------------------------
在login.php页echo session,没有值,在接收页也是没有值,
这是为什么呢,session_start()有的,本机版本是php5,环境:php5+mysql4+adodb+smarty
文件是login.php,smarty->display('login.tpl')在login.tpl中调用<img src="../configs/checkcode.php" border="1"/>,图片显示正常,checkcode代码如下
-----------------------------------------------
<?php
session_start();
class CCheckCodeFile
{
//验证码位数
var $mCheckCodeNum = 4;//产生的验证码
var $mCheckCode = '';//验证码的图片
var $mCheckImage = '';//干扰像素
var $mDisturbColor = '';//验证码的图片宽度
var $mCheckImageWidth = '80';//验证码的图片宽度
var $mCheckImageHeight = '20';/**
*
* @brief 输出头
*
*/
function OutFileHeader()
{
header ("Content-type: image/png");
}/**
*
* @brief 产生验证码
*
*/
function CreateCheckCode()
{
$this->mCheckCode = strtoupper(substr(md5(rand()),0,$this->mCheckCodeNum));
return $this->mCheckCode;
}/**
*
* @brief 产生验证码图片
*
*/
function CreateImage()
{
$this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
imagecolorallocate ($this->mCheckImage, 200, 200, 200);
return $this->mCheckImage;
}/**
*
* @brief 设置图片的干扰像素
*
*/
function SetDisturbColor()
{
for ($i=0;$i<=128;$i++)
{
$this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
}
}/**
*
* @brief 设置验证码图片的大小
*
* @param $width 宽
*
* @param $height 高
*
*/
function SetCheckImageWH($width,$height)
{
if($width==''||$height=='')return false;
$this->mCheckImageWidth = $width;
$this->mCheckImageHeight = $height;
return true;
}/**
*
* @brief 在验证码图片上逐个画上验证码
*
*/
function WriteCheckCodeToImage()
{
for ($i=0;$i<=$this->mCheckCodeNum;$i++)
{
$bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
$x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
if($x==0)$x=5; //first words
$y = rand(0,$this->mCheckImageHeight-15);
imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
}
}/**
*
* @brief 输出验证码图片
*
*/
function OutCheckImage()
{
$this ->OutFileHeader();
$this ->CreateCheckCode();
$this ->CreateImage();
$this ->SetDisturbColor();
$this ->WriteCheckCodeToImage();
$_SESSION["vCode"] = $this->mCheckCode;
imagepng($this->mCheckImage);
imagedestroy($this->mCheckImage);
}
}
$c_check_code_image = new CCheckCodeFile();
$c_check_code_image ->SetCheckImageWH(70,23);//设置显示验证码图片的尺寸
$c_check_code_image ->OutCheckImage();?>----------------------------------
在login.php页echo session,没有值,在接收页也是没有值,
这是为什么呢,session_start()有的,本机版本是php5,环境:php5+mysql4+adodb+smarty
<?php
session_start(); 么?另外 print_r($_SESSION);看session信息