#1 Kvoid
呃，之前的帐号忘记了，现注册了一个，字体我就不上传了，其它的也不废话了，注释大家都看得懂。。文章已经先发在我的博客上了:lol，欢迎去逛。付上文章源地址，传送门/**
* 验证码类
*
* 可切换简体中文，英文数字
* 支持ttf字体，并产生字符点干扰和线干扰，字体角度旋转，背景16进制色彩以及透明
* 需要GD库和FreeType支持
*
* 测试环境 Debian6.0 PHP5.35 nginx0.8.54
*
* @author Kvoid
* @copyright http://kvoid.com
* @version 1.0
* @access public
* @example
* session_start();
* header('Content-type: image/png');
* include('verify.php');
* $v=new Verify(null,null,5); //实列化，默认根据字符大小产生图像，产生5个字符
* $v->ZH=true; //打开中文验证码开关
* $v->bg_alpha=127; //背景全透明，注意IE6不支持png透明，需写hack
* $_SESSION['verify']=$v->show();; //字符串写入session，并输出
*/
class Verify {
/**
* 图像句柄
*/
private $img;
/**
* 图像宽度
*/
private $w;
/**
* 图像高度
*/
private $h;
/**
* 背景颜色，默认为白色
*/
public $bg_color = 'FFF';
/**
* 背景透明度，范围0-127，127为完全透明
*/
public $bg_alpha = 0;
/**
* 干扰像素数量
*/
public $pts_num = 50;
/**
* 干扰像素颜色
*/
private $pts_color;
/**
* 干扰线条数量
*/
public $line_num = 4;
/**
* 干扰线条颜色
*/
private $line_color;
/**
* 验证字符数
*/
private $font_num;
/**
* 验证字符大小(px)
*/
private $font_size;
/**
* ttf字体路径，数组
*/
public $font_family = array('simhei.ttf', 'msyh.ttf', 'simkai.ttf', 'mnhzgb.ttf', 'fzlxt.ttf', 'hycy.ttf');
/**
* 简体中文开关
*/
public $ZH = false;
/**
* 构造函数
* @param witdh 整型int (px) 实例化指定图像宽充，不指定根据字符大小自动计算
* @param height 整型int (px) 实例化指定图像高充，不指定根据字符大小自动计算
* @param font_num 整型int 产生字符个数
* @param font_size 整型int (px) 指定字符大小
*/
public function __construct($width = null, $height = null, $font_num = 4, $font_size = 20) {
$this->font_num = $font_num;
$this->w = $width;
$this->h = $height;
$this->font_size = $font_size;
}
/**
* 产生验证字符串
*/
public function code() {
if ($this->ZH == true) {
for ($i = 0; $i < $this->font_num; $i++) {
//$str .= '%'.dechex(mt_rand(176,247)).'%'.dechex(mt_rand(160,254)); //此方法会生成生僻字
$c1 = substr(str_shuffle('BCD'), 0, 1);
$c2 = ($c1 == 'D') ? substr(str_shuffle('0123456'), 0, 1) : substr(str_shuffle('0123456789ABCDEF'), 0, 1);
$c3 = substr(str_shuffle('ABCEF'), 0, 1);
$c4 = ($c3 == 'A') ? substr(str_shuffle('123456789ABCDEF'), 0, 1) : (($c3 == 'F') ? substr(str_shuffle('0123456789ABCDE'), 0, 1) : substr(str_shuffle('0123456789ABCDEF'), 0, 1));
$str .= '%' . $c1 . $c2 . '%' . $c3 . $c4;
}
return mb_convert_encoding(urldecode($str), 'UTF-8', 'GBK');
} else return substr(str_shuffle('1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'), 0, 4);
}
/**
* 产生图像，指定宽高与背景颜色
*/
private function create() {
if ($this->font_family == null) $this->font_family = mt_rand(1, 5);
if ($this->w == null) $this->w = ($this->ZH) ? ($this->font_num + 1) * $this->font_size * 1.5 : ($this->font_num + 1) * $this->font_size;
if ($this->h == null) $this->h = $this->font_size * 2;
$this->img = imagecreate($this->w, $this->h);
$bgcolors = $this->handlecolor($this->bg_color);
imagecolorallocatealpha($this->img, $bgcolors[0], $bgcolors[1], $bgcolors[2], $this->bg_alpha);
}
/**
* 处理16进制颜色，返回RGB颜色数组
*
* @param color 数组array(int,int,int) 对应 R G B, 或字符串string 支持web安全色缩写
* @return array(int,int,int)
*/
private function handlecolor($color) {
if (is_array($color)) return $color;
$wordnum = strlen($color);
switch ($wordnum) {
case 3:
return array(hexdec(substr($color, 0, 1) . substr($color, 0, 1)), hexdec(substr($color, 1, 1) . substr($color, 1, 1)), hexdec(substr($color, 2, 1) . substr($color, 2, 1)));
break;
case 6:
return array(hexdec(substr($color, 0, 2)), hexdec(substr($color, 2, 2)), hexdec(substr($color, 4, 2)));
break;
default:
die('Invalid arguments');
}
}
/**
* 产生干扰线条
*/
private function makeline() {
for ($i = 0; $i < $this->line_num; $i++) {
$this->line_color = imagecolorallocate($this->img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imageline($this->img, mt_rand(0, $this->w), mt_rand(0, $this->h), mt_rand(0, $this->w), mt_rand(0, $this->h), $this->line_color);
}
}
/**
* 产生干扰像素
*/
private function makepoint() {
for ($i = 0; $i < $this->pts_num; $i++) {
$this->pts_color = imagecolorallocate($this->img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagesetpixel($this->img, mt_rand(0, $this->w), mt_rand(0, $this->h), $this->pts_color);
}
}
/**
* 生成图像
*/
public function show() {
$this->create(); $code=$this->code();
$font_family = $this->font_family[mt_rand(0, count($this->font_family) - 1)];
for ($i = 0; $i < $this->font_num; $i++) {
$fontcolor = imagecolorallocate($this->img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagettftext($this->img, $this->font_size, mt_rand(-30, 30), ($this->ZH) ? ($this->font_size / 2 + $this->font_size * $i) * 1.5 : $this->font_size / 2 + $this->font_size * $i, ($this->h + $this->
font_size) / 2, $fontcolor, $font_family, mb_substr($code, $i, 1, 'UTF-8'));
}
$this->makepoint();
$this->makeline();
imagepng($this->img);
imagedestroy($this->img); return $code;
}
}
?>
2011-03-21 02:49:49