php 圖形驗證碼類

php 圖形驗證碼類
<img src="verify_image.php" alt="點此重新整理驗證碼" name="verify_code" width="65" height="20" border="0" id="verify_code" ｏｎｃｌｉｃｋ="ｄｏｃｕｍｅｎｔ.ｇｅｔＥｌｅｍｅｎｔＢｙＩｄ('verify_code').src='verify_image.php?'+Ｍａｔｈ.ｒａｎｄｏｍ();" style="cursor:pointer;" />

複製代碼字型檔見附件！

<?php

session_start();

 

$vi = new vCodeImage;

$vi->SetImage(1,4,65,20,80,1);

 

class vCodeImage{

 /*******************************************************

 **FILENAME: verify_image.php

 **COPYRIGHT: NONE! (但請保留此資訊)

 **AUTHOR: vsFree.Com

 **DATE: 2007-08-08

 ********************************************************/

 

 var $mode;  //1：數字模式，2：字母模式，3：數字字母模式，其他：數字字母最佳化模式

 var $v_num;  //驗證碼個數

 var $img_w;  //驗證碼映像寬度

 var $img_h;  //驗證碼映像高度

 var $int_pixel_num;  //幹擾像素個數

 var $int_line_num;  //幹擾線條數

 var $font_dir;   //字型檔相對路徑

 var $border;   //映像邊框

 var $borderColor;  //映像邊框顏色

 

 function SetImage($made,$v_num,$img_w,$img_h,$int_pixel_num,$int_line_num,$font_dir='../font',$border=true,$borderColor='255,200,85'){

  if(!isset($_SESSION['vCode'])){

   session_register('vCode');

  }

  $_SESSION['vCode']="";

 

  $this->mode = $made;

  $this->v_num = $v_num;

  $this->img_w = $img_w;

  $this->img_h = $img_h;

  $this->int_pixel_num = $int_pixel_num;

  $this->int_line_num = $int_line_num;

  $this->font_dir = $font_dir;

  $this->border = $border;

  $this->borderColor = $borderColor;

  $this->GenerateImage();

 }

 

 function GetChar($mode){

  if($mode == "1"){

   $ychar = "0,1,2,3,4,5,6,7,8,9";

  }

  else if($mode == "2"){

   $ychar = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";

  }

  else if($mode == "3"){

   $ychar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";

  }

  else

   $ychar = "3,4,5,6,7,8,9,A,B,C,D,H,K,P,R,S,T,W,X,Y";

  return $ychar;

 }

 

 function RandColor($rs,$re,$gs,$ge,$bs,$be){

  $r = mt_rand($rs,$re);

  $g = mt_rand($gs,$ge);

  $b = mt_rand($bs,$be);

  return array($r,$g,$b);

 }

 

 function GenerateImage(){

  $im = imagecreate($this->img_w,$this->img_h);

 

  $black = imagecolorallocate($im, 0,0,0);

  $white = imagecolorallocate($im, 255,255,255);

  $bgcolor = imagecolorallocate($im, 250,250,250);

 

  imagefill($im,0,0,$bgcolor);

 

  $fonts = ScanDir($this->font_dir);

  $fmax = count($fonts) - 2;

 

  $ychar = $this->GetChar($this->mode);

  $list = explode(",",$ychar);

 

  $x = mt_rand(2,$this->img_w/($this->v_num+2));

  $cmax = count($list) - 1;

 

  $v_code = '';

 

  for($i=0;$i<$this->v_num;$i++) //驗證碼

  {

   $randnum = mt_rand(0,$cmax);

   $this_char = $list[$randnum];

   $v_code .= $this_char;

   $size = mt_rand(intval($this->img_w/5),intval($this->img_w/4));

   $angle = mt_rand(-20,20);

   $y = mt_rand(($size+2),($this->img_h-2));

   if($this->border)

    $y = mt_rand(($size+3),($this->img_h-3));

   $rand_color = $this->RandColor(0,200,0,100,0,250);

   $randcolor = imagecolorallocate($im,$rand_color[0],$rand_color[1],$rand_color[2]);

   $fontrand = mt_rand(2, $fmax);

   $font = "$this->font_dir/".$fonts[$fontrand];

   imagettftext($im, $size, $angle, $x, $y, $randcolor, $font, $this_char);

   $x = $x + intval($this->img_w/($this->v_num+1));

  }

 

  for($i=0;$i<$this->int_pixel_num;$i++){//幹擾像素

   $rand_color = $this->RandColor(50,250,0,250,50,250);

   $rand_color_pixel = imagecolorallocate($im,$rand_color[0],$rand_color[1],$rand_color[2]);

   imagesetpixel($im, mt_rand()%$this->img_w, mt_rand()%$this->img_h, $rand_color_pixel);

  }

 

  for($i=0;$i<$this->int_line_num;$i++){ //幹擾線

   $rand_color = $this->RandColor(0,250,0,250,0,250);

   $rand_color_line = imagecolorallocate($im,$rand_color[0],$rand_color[1],$rand_color[2]);

   imageline($im, mt_rand(0,intval($this->img_w/3)), mt_rand(0,$this->img_h), mt_rand(intval($this->img_w - ($this->img_w/3)),$this->img_w), mt_rand(0,$this->img_h), $rand_color_line);

  }

 

  if($this->border) //畫出邊框

  {

   if(preg_match("/^d{1,3},d{1,3},d{1,3}$/",$this->borderColor)){

    $borderColor = explode(',',$this->borderColor);

   }

   $border_color_line = imagecolorallocate($im,$borderColor[0],$borderColor[1],$borderColor[2]);

   imageline($im, 0, 0, $this->img_w, 0, $border_color_line); //上橫

   imageline($im, 0, 0, 0, $this->img_h, $border_color_line); //左豎

   imageline($im, 0, $this->img_h-1, $this->img_w, $this->img_h-1, $border_color_line); //下橫

   imageline($im, $this->img_w-1, 0, $this->img_w-1, $this->img_h, $border_color_line); //右豎

  }

 

  imageantialias($im,true); //消除鋸齒

 

  $time = time();

  $_SESSION['vCode'] = $v_code."|".$time; //把驗證碼和產生時間負值給$_SESSION[vCode]

 

  //產生映像給瀏覽器

  if (function_exists("imagegif")) {

      header ("Content-type: image/gif");

      imagegif($im);

  }

  elseif (function_exists("imagepng")) {

      header ("Content-type: image/png");

      imagepng($im);

  }

  elseif (function_exists("imagejpeg")) {

      header ("Content-type: image/jpeg");

      imagejpeg($im, "", 80);

  }

  elseif (function_exists("imagewbmp")) {

      header ("Content-type: image/vnd.wap.wbmp");

      imagewbmp($im);

  }

  else

      die("No Image Support On This Server !");

 

  imagedestroy($im);

 }

}