PHP实现中文圆形印章特效

发布:smiling　来源: PHP粉丝网　添加日期：2021-05-29 14:25:56　浏览: 评论：0　

心血来潮，写了个圆形印章生成器，字体的弧形旋转颇费功夫。总算效果还不错，代码存档。

方法一：

<?php

/*

* 中文圆形印章类

* @author lkk/lianq.net

* @create on 10:03 2012-5-29

* @example:

* $seal = new circleSeal('你我他坐站走东西南北中',75,6,24,0,0,16,40);

* $seal->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){

    $this->sealString  = emptyempty($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($i=0;$i<$this->rimWidth;$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($i=0;$i<$leng;$i++){

      $words[] = mb_substr($this->sealString,$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($i=0;$i<5;$i++){

      //五个顶点坐标

      $this->points[] = $rad_out * cos(2*M_PI/5*$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();

  }

}

方法二：

<?php

@$hos=iconv("GBK", "UTF-8", $_GET["hos"]);

if(!isset($hos))

exit;

$im=ImageCreate(150,150);

$gray=ImageColorResolveAlpha($im,200,200,200,127);

$red=ImageColorAllocate($im,230,150,150);

for($i=0;$i<6;$i++)

ImageArc($im,75,75,148-$i,148-$i,0,360,$red);

$stock='C:\WINDOWS\Fonts\simkai.ttf';

$point="★";

$size=30;

ImageTTFText($im,$size,0,72-$size/2,72+$size/2,$red,$stock,$point);

$a=75;$b=-75;//中心点坐标

$r=65;$m=40;//半径，角度

$size=16;//字体大小

$r=$r-$size;

$word=array();

$max=18;

$count=mb_strlen($hos,'utf8');

if($count>$max)$count=$max;

if($count>12)

$m=floor(360/$count);

else if($count>5)

$m-=$count;

for($i=0;$i<$count;$i++)

$word[]=mb_substr($hos,$i,1,'utf8');

$j=floor($count/2);

if($j!=$count/2)

{

for($i=$j;$i>=0;$i--)

{

$arc=$m*($j-$i)+$size/2;

$x=round($r*cos((90+$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90+$arc)*M_PI/180))+$b);

if($arc<10)$arc=0;

ImageTTFText($im,$size,$arc,$x,$y,$red,$stock,$word[$i]);

$arc=$m*($j-$i)-$size/2;

$x=round($r*cos((90-$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90-$arc)*M_PI/180))+$b);

if($arc<10)$arc=0;

ImageTTFText($im,$size,-$arc,$x,$y,$red,$stock,$word[$j+$j-$i]);

}

}

else

{

$j=$j-1;

for($i=$j;$i>=0;$i--)

{

$arc=$m/2+$m*($j-$i)+$size/2;

$x=round($r*cos((90+$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90+$arc)*M_PI/180))+$b);

ImageTTFText($im,$size,$arc,$x,$y,$red,$stock,$word[$i]);

$arc=$m/2+$m*($j-$i)-$size/2;

$x=round($r*cos((90-$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90-$arc)*M_PI/180))+$b);

ImageTTFText($im,$size,-$arc,$x,$y,$red,$stock,$word[$j+$j+1-$i]);

}

}

header('Content-Type:image/png');

ImagePNG($im);

?>

以上所述就是本文的全部内容了，希望大家能够喜欢

Tags: PHP中文圆形 PHP印章特效

分享到：

上一篇：PHP 常用的header头部定义汇总
下一篇：PHP自动生成表单代码分享

PHP实现中文圆形印章特效

发布:smiling　来源: PHP粉丝网　添加日期：2021-05-29 14:25:56　浏览: 评论：0

Tags: PHP中文圆形 PHP印章特效

分享到：

推荐文章

热门文章

最新评论文章

PHP实现中文圆形印章特效

发布:smiling 来源: PHP粉丝网 添加日期：2021-05-29 14:25:56 浏览: 评论：0

Tags: PHP中文圆形 PHP印章特效

推荐文章

热门文章

最新评论文章

发布:smiling　来源: PHP粉丝网　添加日期：2021-05-29 14:25:56　浏览: 评论：0　