PHP实现中文圆形印章特效
方法一:
<?php /* *中文圆形印章类 *@authorlkk/lianq.net *@createon10:032012-5-29 *@example: *$seal=newcircleSeal('你我他坐站走东西南北中',75,6,24,0,0,16,40); *$seal->doImg(); */ classcircleSeal{ 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 publicfunction__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 privatefunctioncreateImg(){ $this->width=2*$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 privatefunctiondrawRim(){ 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 privatefunctiondrawInnerCircle(){ imagearc($this->img,$this->centerDot['x'],$this->centerDot['y'],2*$this->innerRadius,2*$this->innerRadius,0,360,$this->backGround); } //画字符串 privatefunctiondrawString(){ //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 privatefunctiondrawStart(){ $ang_out=18+$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 privatefunctionoutPut(){ header('Content-type:image/png'); imagepng($this->img); imagedestroy($this->img); } //对外生成 publicfunctiondoImg(){ $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); elseif($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); ?>
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