时间:2021-07-01 10:21:17 帮助过:31人阅读
输出文字到验证码
<?php
/*
* Captcha Class base on PHP GD Lib
* @author Design
* @version 1.0
* @demo
* include('captchaClass.php');
* $captchaDemo=new Captcha();
* $captchaDemo->createImage();
*/
class Captcha{
//@定义验证码图片高度
private $height;
//@定义验证码图片宽度
private $width;
//@定义验证码字符个数
private $textNum;
//@定义验证码字符内容
private $textContent;
//@定义字符颜色
private $fontColor;
//@定义随机出的文字颜色
private $randFontColor;
//@定义字体大小
private $fontSize;
//@定义字体
private $fontFamily;
//@定义背景颜色
private $bgColor;
//@定义随机出的背景颜色
private $randBgColor;
//@定义字符语言
private $textLang;
//@定义干扰点数量
private $noisePoint;
//@定义干扰线数量
private $noiseLine;
//@定义是否扭曲
private $distortion;
//@定义扭曲图片源
private $distortionImage;
//@定义是否有边框
private $showBorder;
//@定义验证码图片源
private $image;
//@Constructor 构造函数
public function Captcha(){
$this->textNum=4;
$this->fontSize=16;
$this->fontFamily='c:\windows\fontsSIMYOU.ttf';//设置中文字体,可以改成linux的目录
$this->textLang='en';
$this->noisePoint=30;
$this->noiseLine=3;
$this->distortion=false;
$this->showBorder=false;
}
//@设置图片宽度
public function setWidth($w){
$this->width=$w;
}
//@设置图片高度
public function setHeight($h){
$this->height=$h;
}
//@设置字符个数
public function setTextNumber($textN){
$this->textNum=$textN;
}
//@设置字符颜色
public function setFontColor($fc){
$this->fontColor=sscanf($fc,'#%2x%2x%2x');
}
//@设置字号
public function setFontSize($n){
$this->fontSize=$n;
}
//@设置字体
public function setFontFamily($ffUrl){
$this->fontFamily=$ffUrl;
}
//@设置字符语言
public function setTextLang($lang){
$this->textLang=$lang;
}
//@设置图片背景
public function setBgColor($bc){
$this->bgColor=sscanf($bc,'#%2x%2x%2x');
}
//@设置干扰点数量
public function setNoisePoint($n){
$this->noisePoint=$n;
}
//@设置干扰线数量
public function setNoiseLine($n){
$this->noiseLine=$n;
}
//@设置是否扭曲
public function setDistortion($b){
$this->distortion=$b;
}
//@设置是否显示边框
public function setShowBorder($border){
$this->showBorder=$border;
}
//@初始化验证码图片
public function initImage(){
if(empty($this->width)){$this->width=floor($this->fontSize*1.3)*$this->textNum+10;}
if(empty($this->height)){$this->height=$this->fontSize*2;}
$this->image=imagecreatetruecolor($this->width,$this->height);
if(empty($this->bgColor)){
$this->randBgColor=imagecolorallocate($this->image,mt_rand(100,255),mt_rand(100,255),mt_rand(100,255));
}else{
$this->randBgColor=imagecolorallocate($this->image,$this->bgColor[0],$this->bgColor[1],$this->bgColor[2]);
}
imagefill($this->image,0,0,$this->randBgColor);
}
//@产生随机字符
public function randText($type){
$string='';
switch($type){
case 'en':
$str='ABCDEFGHJKLMNPQRSTUVWXY3456789';
for($i=0;$i<$this->textNum;$i++){
$string=$string.','.$str[mt_rand(0,29)];
}
break;
case 'cn':
for($i=0;$i<$this->textNum;$i++) {
$string=$string.','.chr(rand(0xB0,0xCC)).chr(rand(0xA1,0xBB));
}
$string=iconv('GB2312','UTF-8',$string); //转换编码到utf8
break;
}
return substr($string,1);
}
//@