验证码类，php验证码类

验证码类，php验证码类

熟悉相关图像处理函数，简单的验证码类

 1     //code class
 2     class ValidateCode {
 3         private $charset = 'abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789';    //random effects
 4         private $code;              //code  
 5         private $codelen = 4 ;      //code length
 6         private $width = 130;       //width
 7         private $heigth = 50;       //height
 8         private $img;               //image handle
 9         private $font;              //font file
10         private $fontsize = 20;          //font size
11         private $fontcolor;         //font color
12         
13         //the construct initialization
14         public function __construct(){
15             $this->font = ROOT_PATH.'/font/elephant.ttf';
16         }
17                 
18         //create random code from $charset
19         private function createCode(){
20             $_len = strlen($this->charset);
21             for($i=1;$i$this