为什么80%的码农都做不了架构师？>>> 
代码如下:<?php
/*图片验证码文件，加减计算方式*/class ImageCode{private $Jiashu = 0; //加数或者减数private $JianShu = 0; //被加数或者被减数private $YunSuan = ''; //运算符private $DeShu = 0; //得数private $String = ''; //字符串样式private $Img; //图片对象private $Width = 100; //图片宽度private $Height = 50; //图片高度private $Ttf = 'Num.ttf';//字体文件private $Session = 'code'; //Session变量private function JiaShu(){header('Content-type:image/png');$this -> Jiashu = rand(1, 10);$this -> JianShu = rand(1, 10);$this -> YunSuan= $this -> Jiashu > $this -> JianShu ? '-' : '+';$this -> DeShu = $this -> Jiashu > $this -> JianShu ? $this -> Jiashu - $this -> JianShu : $this -> Jiashu + $this -> JianShu;}public function Show( $W = 100, $H = 50, $T = 'Num.ttf', $Code = 'code' ){$this -> JiaShu();$this -> String = $this -> Jiashu . $this -> YunSuan . $this -> JianShu . '= ? ';$this -> Width = $W;$this -> Height = $H;$this -> Ttf = $T;$this -> Session= $Code;session_start();$_SESSION[$this -> Session] = $this -> DeShu;$this -> Images();}private function Images(){$this -> Img = imagecreate($this -> Width, $this -> Height);$background_color = imagecolorallocate ($this -> Img, 255, 255, 255);imagecolortransparent($this -> Img, $background_color);imagettftext($this -> Img, 14, 0, 1, 20, imagecolorallocate ($this -> Img, 0, 0, 0), $this -> Ttf, $this -> String );$this -> EchoImages();}private function EchoImages(){imagepng($this -> Img);imagedestroy($this -> Img);}}$ImageCode = new ImageCode;
$ImageCode -> Show(130, 35, 'Num.ttf', 'code');