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->ipixnum;$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();

}

}

?>

session_start();

$text = new code;

$text->createimage();

$text->gettxt();

$text->createpix();

$text->createstring();

?>