一個php驗證碼產生類別代碼

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 class ValidationCode
 {
 // 屬性
 private $width;
 private $priight; ;
 私人$image;
 私人$disturbColorNum;  //幹擾元素數量
 private $checkCode;
 function __construct($width=80,$height=20,$codeNum=4)
 {
 $this->width=$width;
 $this->height=$height;
 $this->codeNum=$codeNum;
 $number=floor($width*$height/15);
 if($number> ; 240-$codeNum)
 {
 $this->disturbColorNum=240-$codeNum;
 }else
 {
 $this->disturbColorNum=$number;
 }
 $this->checkCode=$this->createCheckcode();
 }
 function getCheckCode()
 {
 return $this->checkCode;
 }
 private function createImage (){
 $this->image=imagecreatetruecolor($this->寬度,$this->高度);
 $backcolor=imagecolorallocate($this->image ,rand(225,255),rand(225,255) ,rand(255,255));
 imagefill($this->image,0,0,$backcolor);
 $border=imagecolorallocate($this->; image,0,0,0);
 imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
 }
 原生函數setDisturbColor(){
 for ($i=0;$idisturbColorNum;$i ){
 $color=imagecolorallocate($this->image,rand (0,255),rand(0,255),rand(0,255));
 imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->image) height-2),$color);
 }
 for ($i=0;$i {
 $color=imagecolorallocate($this->image, rand(0,255),rand(0,255),rand(0,255));
 imagearc($this->影像,rand(-10,$this->寬度),rand(-10,$this->;高度),rand(30,300),rand(20,300),55,44,$color );
 }
 }
 牛皮函數outputText($fontFace=""){
 for($ i=0;$icodeNum;$i )
 {
 $fontcolor=imagecolorallocate($this->image,rand(0,128),rand(0,128),rand(0,128) );
 if($fontFace=="")
 {
 $ fontsize=rand(3,5);
 $x=floor($this->width/$this-> ;codeNum)*$i 5;
 $y=rand(0,$this->height -15);
 imagechar($this->圖片,$fontsize,$x,$y,$這->checkCode{$i},$fontcolor);
 }
 else
 {
 $fontsize=rand(12,16);
 $x=floor(($this ->width-8)/$this->codeNum)*$i 8;
 $y=rand( $fontsize,$this->height-8);
 imagettftext($this-> ;圖片,$fontsize,rand(-45,45),$x,$y,$fontcolor,$fontFace,$this- >checkCode{$i});
 }
 }
 }

 private function createCheckCode(){
 $code="23456789abcdefghijkm(){
 $code="23456789abcdefghijkm for($i=0;$icodeNum ;$i )
 {
 $char=$code{rand(0,strlen($code)-1)};
 $str.=$char;
 }
 回傳$ str;
 }
 原生函數outputImage()
 {
 if(imagetypes()&IMG_GIF)
 {
 header("Content-Type:image/gif");
 imagepng($this->image);
 }else if(imagetypes()&IMG_JPG)
 {
 header( "Content-Type:image/jpeg");
 imagepng($this ->image);
 }else if(imagetypes()&IMG_PNG)
 {
 header("Content-Type:image /png");
 imagepng($this->image) ;
 }else if(imagetypes()&IMG_WBMP){
 header("Content-Type:image/vnd.wap.wbmp");
 imagepng($this->image);
 }else
 {
 die("PHP不支援圖片驗證碼");
 }
 }
 //透過此方法向瀏覽器輸出圖像
 function showImage($fontFace ="")
 {
 //圖像背景建立
 $this->createImage();
 //設定乾預元素
 $this->setDisturbColor();
 // 向圖像中隨機畫出文字
 $this->outputText($fontFace);
 // 圖像輸出
 $this->輸出影像();
 }

 function __destruct()
 {
 imagedestroy($this->image);
 }
 }
 function checklogin(){
 if(empty( _POST['name']))
 die( '使用者名稱不能為空');
 if(empty($_POST['password']))
 die("密碼不能為空") ;
 if($_SESSION['code']!=$_POST['vertify'])
 die("驗證碼輸入不正確".$_SESSION['code']);

 $username=$_POST['name'];
 $password=md5($_POST['password']);
 //檢查是否存在
 conndb($username,$password);
 }
 function conndb($name="",$ps=""){
 $conn=mysql_connect('localhost','root','123456');
 if(!$ conn) die("資料庫連線失敗".mysql_error());
 mysql_select_db('5kan',$conn) or die('選擇資料庫失敗'.mysql_error());
 mysql_set_charset('utf8', $conn);
 $sql="select id from k_user where username='{$name}' and password='{$ps}'";
 $result=mysql_query($sql) or die(" SQL語句錯誤".mysql_error());
 if(mysql_num_rows($result)>0) die("登入成功");
 else die("使用者名稱或密碼錯誤");
 mysql_close ($conn);
 }
 session_start();
 if(!isset($_POST['randnum']))
 {
 $code=new ValidationCode(120,20, 4);
 $code->showImage("comicbd.ttf"); //顯示在頁面
 $_SESSION['code']=$code->getCheckCode();//儲存在伺服器中
 }
 else
 {
 checklogin();
 }

?>

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複製程式碼

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