- <?php
- class ImageCode{
- private $width;//驗證碼圖片寬度
- private $height;//驗證碼圖片高度
- private $codeNum;//驗證碼字符個數
- private $checkCode;//驗證碼字符
- private $image;//驗證碼畫布
- function __construct($width=60,$height=20,$codeNum=4){
- $this->width=$width;
- $this->height=$height;
- $this->codeNum=$codeNum;
- $this->checkCode=$this->createCheckCode();
- }
- function getcreateImage(){
- $this->getcreateImage();
- $this->outputText();
- $this->setDisturbColor();
- $this->outputImage();
- }
- function getCheckCode(){
- return $this->checkCode;
- }
- private function getCreateImage(){
- $this->image=imagecreatetruecolor($this->width,$this->height);
- $black=imagecolorallocate($this->image,255,255,255,0);
- $border=imagecolorallocate($this->image,255,255,255,255);
- imagefilledrectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
- }
- private function createCheckCode(){
- for($i=0;$i<$this->codeNum;$i){
- $number=rand(0,2);
- switch($number){
- case 0:
- $rand_number=rand(48,57);//數字
- break;
- case 1:
- $rand_number=rand(65,90);//大寫字母
- break;
- case 2:
- $rand_number=rand(97,122);
- break;
- }
- $asc=sprintf("%c",$rand_number);
- $asc_number=$asc_number.$asc;
- }
- return $asc_number;
- }
- private function setDisturbColor(){
- for($i=0;$i<=100;$i++){
- $color=imagecolorallocate($this->image,255,255,255);
- imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color);
- }
- }
- private function outputImage(){
- if(imagetypes()&IMG_GIF){
- header("Content_type:image/gif");
- imagegif($this->image);
- }elseif(imagetypes()&IMG_JGP){
- header("Content_type:image/jpeg");
- imagejpeg($this->image,"",0.5);
- }else{//開源代碼Vevb.com
- die("PHP不支持圖像創建");
- }
- }
- function __destruct(){
- imagedestroy($this->image);
- }
- }
- ?>
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