，验证码已经调用成功了，但发现做登陆的时候，提示验证码错误。
if(I("code","","strtolower") !=session($_sessionName)){
$this->error("验证码错误!");}================================================
验证码封装的类代码如下：Verify.class.php
<?php
/**
* 验证码图片生成类
*
* 生成、显示、验证码
*
* @author tommy <streen003@gmail.com>
* @copyright Copyright (c) 2010 Tommycode Studio
* @link http://www.doitphp.com
* @license New BSD License.{@link http://www.opensource.org/licenses/bsd-license.php}
* @version $Id: PinCode.class.php 2.0 2012-12-23 11:36:01Z tommy $
* @package library
* @since 1.0
*/
if (!defined('THINK_PATH')) exit();
class Verify {
/**
* 验证码图片的背景图片.
* @var string
*/
protected $_imageUrl;
/**
* 字体名称
* @var sting
*/
protected $_fontName;
/**
* 字体大小
* @var integer
*/
protected $_fontSize;
/**
* 图片实例化名称
* @var object
*/
protected $_image;
/**
* 图象宽度
* @var integer
*/
protected $_width;
/**
* 图象高度
* @var integer
*/
protected $_height;
/**
* 图片格式, 如:jpeg, gif, png
* @var string
*/
protected $_type;
/**
* 字体颜色
* @var string
*/
protected $_fontColor;
/**
* 背景的颜色
* @var string
*/
protected $_bgColor;
/**
* 验证码内容
* @var string
*/
protected $_textContent;
/**
* 生成验证码SESSION的名称,用于类外数据验证
* @var string
*/
protected $_sessionName;
/**
* 构造方法
* @access public
* @return boolean
*/
public function __construct() {
$this->_fontSize = 14;
$this->_fontName = dirname(__FILE__) . '/ttf/aispec.ttf';
$this->_sessionName = 'doitphp_pincode_session_id';
$this->_width = 90;
$this->_height = 30;
return true;
}
/**
* 设置字体名称.
* @access public
* @param sting $name 字体名称(字体的路径)
* @param integer $size 字体大小
* @return object
*/
public function setFontName($name, $size = null) {
if ($name) {
$this->_fontName = $name;
}
if ($size) {
$this->_fontSize = intval($size);
}
return $this;
}
/**
* 设置字体大小.
* @access public
* @param integer $size 字体大小
* @return object
*/
public function setFontSize($size) {
if ($size) {
$this->_fontSize = (int)$size;
}
return $this;
}
/**
* 设置背景图片或水印图片的URL.
* @access public
* @param string $url 图片的路径(图片的实际地址)
* @return object
*/
public function setBgImage($url) {
if ($url) {
$this->_imageUrl = $url;
}
return $this;
}
/**
* 设置生成图片的大小.
* @access public
* @param integer $width 图片的宽度
* @param integer $height 图片的高度
* @return object
*/
public function setImageSize($width, $height) {
if ($width) {
$this->_width = (int)$width;
}
if ($height) {
$this->_height = (int)$height;
}
return $this;
}
/**
* 设置验证码的sessionName.
* @access public
* @param string $name Session名称
* @return object
*/
public function setSessionName($name) {
if ($name) {
$this->_sessionName = $name;
}
return $this;
}
/**
* 设置验证码内容.
* @access public
* @param string $content 验证码内容
* @return object
*/
public function setTextContent($content) {
if ($content) {
$this->_textContent = $content;
}
return $this;
}
/**
* 获取颜色参数.
* @access public
* @param string $param 颜色参数. 如：#FF0000
* @return object
*/
public function setTextColor($param) {
//参数分析
if (!$param) {
return $this;
}
//将十六进制颜色值转化为十进制
$x = hexdec(substr($param, 1, 2));
$y = hexdec(substr($param, 3, 2));
$z = hexdec(substr($param, 5, 2));
$this->_fontColor = array($x, $y, $z);
return $this;
}
/**
* 获取背景的颜色参数
* @access public
* @param string $param 颜色参数. 如：#FF0000
* @return object
*/
public function setBgColor($param) {
//参数分析
if (!$param) {
return $this;
}
//将十六进制颜色值转化为十进制
$x = hexdec(substr($param, 1, 2));
$y = hexdec(substr($param, 3, 2));
$z = hexdec(substr($param, 5, 2));
$this->_bgColor = array($x, $y, $z);
return $this;
}
/**
* 生成验证码内容.
* @access protected
* @return stirng
*/
protected function getPincodeContent() {
if (!$this->_textContent) {
$char = '2345678abcdefhijkmnpqrstuvwxyz';
$num1 = $char[mt_rand(0, 23)];
$num2 = $char[mt_rand(0, 23)];
$num3 = $char[mt_rand(0, 23)];
$num4 = $char[mt_rand(0, 23)];
$this->_textContent = $num1 . $num2 . $num3 . $num4;
}
return $this->_textContent;
}
/**
* 验证码的判断
* @access public
* @param string $code 待验证的验证码内容
* @return boolean
*/
public function check($code) {
if (!$code) {
return false;
}
$code = strtolower($code);
if(isset($_SESSION[$this->_sessionName]) && (strtolower($_SESSION[$this->_sessionName]) == $code)){
session($this->_sessionName, null);
return true;
}
return false;
}
/**
* 显示验证码.
* @access public
* @param string $imageUrl 验证码的背影图片路径
* @return void
*/
public function show($imageUrl = null) {
if (!is_null($imageUrl)) {
$this->_imageUrl = trim($imageUrl);
}
$this->_image = (!function_exists('imagecreatetruecolor')) ? imagecreate($this->_width, $this->_height) : imagecreatetruecolor($this->_width, $this->_height);
//当有背景图片存在时
if ($this->_imageUrl) {
//初始化图片信息.
list($imageWidth, $imageHeight, $type) = getimagesize($this->_imageUrl);
//分析图片的格式
switch ($type) {
case 1:
$image = imagecreatefromgif ($this->_imageUrl);
$this->_type = 'gif';
break;
case 2:
$image = imagecreatefromjpeg($this->_imageUrl);
$this->_type = 'jpg';
break;
case 3:
$image = imagecreatefrompng($this->_imageUrl);
$this->_type = 'png';
break;
case 4:
$image = imagecreatefromwbmp($this->_imageUrl);
$this->_type = 'bmp';
break;
}
//背景
$srcX = ($imageWidth > $this->_width) ? mt_rand(0, $imageWidth - $this->_width) : 0;
$srcY = ($imageHeight > $this->_height) ? mt_rand(0, $imageHeight - $this->_height) : 0;
imagecopymerge($this->_image, $image, 0, 0, $srcX, $srcY, $this->_width, $this->_height, 100);
imagedestroy($image);
//边框
$borderColor = imagecolorallocate($this->_image, 255, 255, 255);
imagerectangle($this->_image, 1, 1, $this->_width - 2, $this->_height - 2, $borderColor);
} else {
//定义图片类型
$this->_type = 'png';
//背景
$bgColorArray = (!$this->_bgColor) ? array(255, 255, 255) : $this->_bgColor;
$back_color = imagecolorallocate($this->_image, $bgColorArray[0], $bgColorArray[1], $bgColorArray[2]);
imagefilledrectangle($this->_image, 0, 0, $this->_width -1, $this->_height - 1, $back_color);
//边框
$borderColor = imagecolorallocate($this->_image, 255, 255, 255);
imagerectangle($this->_image, 0, 0, $this->_width - 1, $this->_height - 1, $borderColor);
}
//获取验证码内容.
$this->getPincodeContent();
//验证码中含有汉字
if (!preg_match('~[\x{4e00}-\x{9fa5}]+~u', $this->_textContent)) {
//计算验证码的位数
$codeStrlen = strlen($this->_textContent);
//每位验证码所占用的图片宽度
$perWidth = ceil(($this->_width - 10)/ $codeStrlen);
for($i = 0; $i < $codeStrlen; $i ++) {
//获取单个字符
$textContent = $this->_textContent[$i];
$bbox = imagettfbbox($this->_fontSize, 0, $this->_fontName, $textContent);
$fontW = $bbox[2]-$bbox[0];
$fontH = abs($bbox[7]-$bbox[1]);
$fontX = ceil(($perWidth - $fontW) / 2) + $perWidth * $i + 5;
$min_y = $fontH + 5;
$max_y = $this->_height -5;
$fontY = rand($min_y, $max_y);
$fontColor = (!$this->_fontColor) ? imagecolorallocate($this->_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255)) : imagecolorallocate($this->_image, $this->_fontColor[0], $this->_fontColor[1], $this->_fontColor[2]);
imagettftext($this->_image, $this->_fontSize, 0, $fontX, $fontY, $fontColor, $this->_fontName, $textContent);
}
} else {
//分析验证码的位置
$bbox = imagettfbbox($this->_fontSize, 0, $this->_fontName, $this->_textContent);
$fontW = $bbox[2]-$bbox[0];
$fontH = abs($bbox[7]-$bbox[1]);
$fontX = ceil(($this->_width - $fontW) / 2) + 5;
$min_y = $fontH + 5;
$max_y = $this->_height -5;
$fontY = rand($min_y, $max_y);
$fontColor = (!$this->_fontColor) ? imagecolorallocate($this->_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255)) : imagecolorallocate($this->_image, $this->_fontColor[0], $this->_fontColor[1], $this->_fontColor[2]);
imagettftext($this->_image, $this->_fontSize, 0, $fontX, $fontY, $fontColor, $this->_fontName, $this->_textContent);
}
//干扰线
for ($i = 0; $i < 5; $i ++) {
$line_color = imagecolorallocate($this->_image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imageline($this->_image, mt_rand(2, $this->_width - 3), mt_rand(2, $this->_height - 3), mt_rand(2, $this->_width - 3), mt_rand(2, $this->_height - 3), $line_color);
}
//将显示的验证码赋值给session.
session($this->_sessionName, $this->_textContent);
//当有headers内容输出时.
if (headers_sent()) {
exit('headers already sent');
}
//显示图片,根据背景图片的格式显示相应格式的图片.
switch ($this->_type) {
case 'gif':
header('Content-type:image/gif');
imagegif ($this->_image);
break;
case 'jpg':
header('Content-type:image/jpeg');
imagejpeg($this->_image);
break;
case 'png':
header('Content-type:image/png');
imagepng($this->_image);
break;
case 'bmp':
header('Content-type:image/wbmp');
imagewbmp($this->_image);
break;
}
imagedestroy($this->_image);
}
} 最佳答案
