支撑中文字母数字 自定义字体php验证码程序
|
验证码常用于登陆页面、留言页面、注册页面,验证码的原理很简单:利用GD库创建一个图片,图片当然要加上必要的干扰码,然后在服务器端存入SESSION,等用户提交的时候判断session是否相同. 支持中文字母数字、自定义字体php验证码程序代码如下: <?php /* * Captcha Class base on PHP GD Lib * @author Design * @version 1.0 * @copyright js8.in 2010 * @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(emptyempty($this->width)){$this->width=floor($this->fontSize*1.3)*$this->textNum+10;} if(emptyempty($this->height)){$this->height=$this->fontSize*2;} $this->image=imagecreatetruecolor($this->width,$this->height); if(emptyempty($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); } //@输出文字到验证码 public function createText(){ $textArray=explode(',',$this->randText($this->textLang)); $this->textContent=join('',$textArray); if(emptyempty($this->fontColor)){ $this->randFontColor=imagecolorallocate($this->image,mt_rand(0,100),mt_rand(0,100),mt_rand(0,100)); }else{ $this->randFontColor=imagecolorallocate($this->image,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]); } for($i=0;$i<$this->textNum;$i++){ $angle=mt_rand(-1,1)*mt_rand(1,20); imagettftext($this->image,$this->fontSize,$angle,5+$i*floor($this->fontSize*1.3),floor($this->height*0.75),$this->randFontColor,$this->fontFamily,$textArray[$i]); } } //@生成干扰点 public function createNoisePoint(){ for($i=0;$i<$this->noisePoint;$i++){ $pointColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255)); imagesetpixel($this->image,mt_rand(0,$this->width),mt_rand(0,$this->height),$pointColor); } } //@产生干扰线 public function createNoiseLine(){ for($i=0;$i<$this->noiseLine;$i++) { $lineColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),20); imageline($this->image,0,mt_rand(0,$this->width),$this->width,mt_rand(0,$this->height),$lineColor); } } //@扭曲文字 public function distortionText(){ $this->distortionImage=imagecreatetruecolor($this->width,$this->height); imagefill($this->distortionImage,0,0,$this->randBgColor); for($x=0;$x<$this->width;$x++){ for($y=0;$y<$this->height;$y++){ $rgbColor=imagecolorat($this->image,$x,$y); imagesetpixel($this->distortionImage,(int)($x+sin($y/$this->height*2*M_PI-M_PI*0.5)*3),$y,$rgbColor); } } $this->image=$this->distortionImage; } //@生成验证码图片 public function createImage(){ $this->initImage(); //创建基本图片 $this->createText(); //输出验证码字符 if($this->distortion){$this->distortionText();} //扭曲文字 $this->createNoisePoint(); //产生干扰点 $this->createNoiseLine(); //产生干扰线 if($this->showBorder){imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$this->randFontColor);} //添加边框 imagepng($this->image); imagedestroy($this->image); if($this->distortion){imagedestroy($this->$distortionImage);} return $this->textContent; }//开源代码Cuoxin.com } ?> //使用方法： <?php //session_start(); header("Content-type:image/png"); include('captcha5_class.php'); $captcha5=new Captcha(); //@设置验证码宽度 //$captcha5->setWidth(200); //@设置验证码高度 //$captcha5->setHeight(50); //@设置字符个数 $captcha5->setTextNumber(5); //@设置字符颜色 //$captcha5->setFontColor('#ff9900'); //@设置字号大小 //$captcha5->setFontSize(25); //@设置字体 $captcha5->setFontFamily('c:/windows/fonts/STXINGKA.TTF'); //@设置语言 $captcha5->setTextLang('cn'); //@设置背景颜色 //$captcha5->setBgColor('#000000'); //@设置干扰点数量 //$captcha5->setNoisePoint(600); //@设置干扰线数量 //$captcha5->setNoiseLine(10); //@设置是否扭曲 //$captcha5->setDistortion(true); //@设置是否显示边框 $captcha5->setShowBorder(true); //输出验证码 $code=$captcha5->createImage(); //$_SESSION['captchaCode']['content']=$code; //$_SESSION['captchaCode']['time']=microtime(); ?> （编辑：银川站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
