转自：http://www.blhere.com/1168.html
|
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 |
<?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:windowsfontsSIMYOU.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:windowsfontsSTXINGKA.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(); ?> |