<?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 = $border; } //@初始化验证码图片 public function initImage() { if (empty($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); } //@输出文字到验证码 public function createText() { $textArray = explode(',', $this->randText($this->textLang)); $this->textContent = join('', $textArray); if (empty($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; } } ?> 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(); ?>
