doimg(); */class circleseal { private $sealstring; //印章字符 private $strmaxleng; //最大字符长度 private $sealradius; //印章半径 private $rimwidth; //边框厚度 private $innerradius; //内圆半径 private $startradius; //五角星半径 private $startangle; //五角星倾斜角度 private $background; //印章颜色 private $centerdot; //圆心坐标 private $img; //图形资源句柄 private $font; //指定的字体 private $fontsize; //指定字体大小 private $width; //图片宽度 private $height; //图片高度 private $points; //五角星各点坐标 private $charradius; //字符串半径 private $charangle; //字符串倾斜角度 private $spacing; //字符间隔角度 //构造方法 public function __construct($str ='', $rad = 75, $rmwidth = 6, $strad = 24, $stang = 0, $crang = 0, $fsize = 16, $inrad =0){ $this->sealstring = empty($str) ? '印章测试字符串' : $str; $this->strmaxleng = 12; $this->sealradius = $rad; $this->rimwidth = $rmwidth; $this->startradius = $strad; $this->startangle = $stang; $this->charangle = $crang; $this->centerdot = array('x'=>$rad, 'y'=>$rad); $this->font = dirname(__file__) .'/simkai.ttf'; $this->fontsize = $fsize; $this->innerradius = $inrad; //默认0,没有 $this->spacing = 1; } //创建图片资源 private function createimg(){ $this->width = 2 * $this->sealradius; $this->height = 2 * $this->sealradius; $this->img = imagecreate($this->width, $this->height); imagecolorresolvealpha($this->img,255,255,255,127); $this->background = imagecolorallocate($this->img,255,0,0); } //画印章边框 private function drawrim(){ for($i=0;$irimwidth;$i++){ imagearc($this->img,$this->centerdot['x'],$this->centerdot['y'],$this->width - $i,$this->height - $i,0,360,$this->background); } } //画内圆 private function drawinnercircle(){ imagearc($this->img,$this->centerdot['x'],$this->centerdot['y'],2*$this->innerradius,2*$this->innerradius,0,360,$this->background); } //画字符串 private function drawstring(){ //编码处理 $charset = mb_detect_encoding($this->sealstring); if($charset != 'utf-8'){ $this->sealstring = mb_convert_encoding($this->sealstring, 'utf-8', 'gbk'); } //相关计量 $this->charradius = $this->sealradius - $this->rimwidth - $this->fontsize; //字符串半径 $leng = mb_strlen($this->sealstring,'utf8'); //字符串长度 if($leng > $this->strmaxleng) $leng = $this->strmaxleng; $avgangle = 360 / ($this->strmaxleng); //平均字符倾斜度 //拆分并写入字符串 $words = array(); //字符数组 for($i=0;$isealstring,$i,1,'utf8'); $r = 630 + $this->charangle + $avgangle*($i - $leng/2) + $this->spacing*($i-1); //坐标角度 $r = 720 - $this->charangle + $avgangle*($leng-2*$i-1)/2 + $this->spacing*(1-$i); //字符角度 $x = $this->centerdot['x'] + $this->charradius * cos(deg2rad($r)); //字符的x坐标 $y = $this->centerdot['y'] + $this->charradius * sin(deg2rad($r)); //字符的y坐标 imagettftext($this->img, $this->fontsize, $r, $x, $y, $this->background, $this->font, $words[$i]); } } //画五角星 private function drawstart(){ $ang_out = 18 + $this->startangle; $ang_in = 56 + $this->startangle; $rad_out = $this->startradius; $rad_in = $rad_out * 0.382; for($i=0;$ipoints[] = $rad_out * cos(2*m_pi/5*$i - deg2rad($ang_out)) + $this->centerdot['x']; $this->points[] = $rad_out * sin(2*m_pi/5*$i - deg2rad($ang_out)) + $this->centerdot['y']; //内凹的点坐标 $this->points[] = $rad_in * cos(2*m_pi/5*($i+1) - deg2rad($ang_in)) + $this->centerdot['x']; $this->points[] = $rad_in * sin(2*m_pi/5*($i+1) - deg2rad($ang_in)) + $this->centerdot['y']; } imagefilledpolygon($this->img, $this->points, 10, $this->background); } //输出 private function output(){ header('content-type:image/png'); imagepng($this->img); imagedestroy($this->img); } //对外生成 public function doimg(){ $this->createimg(); $this->drawrim(); $this->drawinnercircle(); $this->drawstring(); $this->drawstart(); $this->output(); }}