Class?code

{

var?$width?=160;?//圖片的寬

var?$hight?=40;?//圖片的高

var?$image;

var?$red?=223;?//圖片的RGB顏色

var?$green?=225;?//紅

var?$blue?=227?;//綠

var?$pix?=227?;//藍

var?$pixcolor;?//雜色顏色;

var?$pixred?=?242;?//紅

var?$pixgreen?=?168;//綠

var?$pixblue?=?162;?//藍

var?$txt=null;//驗證碼文字

var?$txtcode=null;

var?$txtsub=null;

var?$pixnum?=?300;?//雜點數量

var?$i=0;

var?$widthpx=0;

var?$highty=0;

var?$txtreg=50;

var?$txtgreen=30;

function?createimage()??//創建一張圖并填色

{

$this->image?=?imagecreate($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()?//干擾因素

{

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()?//創建驗證碼文字

{

$this->txt?=?array("我","愛","你","葉","就","慧","明","發","真","的","很","想","不","知","到","為","什","么","就","是","忘","不","了","你","也","許","上","輩","欠","錢");

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;?//產生的驗證ID

}

function?createstring()?//創建驗證碼圖片

{

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()//獲得驗證碼圖片

{

$this->createimage();

$this->gettxt();

$this->createpix();

$this->createstring();

}

}

?>

session_start();

$text?=?new?code;

$text->createimage();

$text->gettxt();

$text->createpix();

$text->createstring();

?>

總結

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