<?php Class code {  var $width =160; //图片的宽  var $hight =40; //图片的高  var $image;  var $red =223; //图片的RGB颜色  var $green =225; //红  var $blue =227 ;//绿  var $pix =227 ;//蓝  var $pixcolor; //杂色颜色;  var $pixred = 242; //红  var $pixgreen = 168;//绿  var $pixblue = 162; //蓝  var $txt=null;//验证码文字  var $txtcode=null;  var $txtsub=null;  var $pixnum = 300; //杂点数量  var $i=0;  var $widthpx=0;  var $highty=0;  var $txtreg=50;  var $txtgreen=30;  function createimage()  //创建一张图并填色  {   $this->image = imagecreate($this->width,$this->hight);   $this->color = imagecolorallocate($this->image,$this->red,$this->green,$this->blue);   return imagefill($this->image,0,0,$this->color);  }  function createpix() //干扰因素  {   for($this->i=1;$this->i<$this->pixnum;$this->i++)   {     $this->widthpx = rand(0,$this->width);     $this->highty = rand(0,$this->hight);    $this->pixcolor = imagecolorallocate($this->image,$this->pixred,$this->pixgreen,$this->pixblue);      imagesetpixel($this->image,$this->widthpx,$this->highty,$this->pixcolor);   }  }   function gettxt() //创建验证码文字  {   $this->txt = array("我","爱","你","叶","就","慧","明","发","真","的","很","想","不","知","到","为","什","么","就","是","忘","不","了","你","也","许","上","辈","欠","钱");   for($this->i=0;$this->i<6;$this->i++)   {    $this->sub = $this->txt[rand(0,29)];    $this->txtcode.= $this->sub;   }   $this->txtcode = iconv("GB2312","UTF-8",$this->txtcode);   $_SESSION["code"] = $this->txtcode; //产生的验证ID  }  function createstring() //创建验证码图片  {   imagettftext($this->image,20,5,0,40,$this->pixcolor,"C:\WINDOWS\Fonts\simsun.ttc ",$this->txtcode);   header("content-type:image/png");   return imagepng($this->image);      imagedestroy($this->image);  }  function getcodeimage()//获得验证码图片  {   $this->createimage();   $this->gettxt();   $this->createpix();     $this->createstring();  } } ?> <?php  session_start();    $text = new code; $text->createimage(); $text->gettxt(); $text->createpix(); $text->createstring(); ?>