<?php/***验证码类*/classVerify{//成员属性private$width;//宽private$height;//高private$verify_code;//验证码字符串private$verify_nums;//验证码个数private$verify_type;//验证码字符类型private$p_w_picpath_type;//图片类型（JPG/PNG）private$res;//图片资源//构造函数来执行需要初始化的成员属性publicfunction__construct($width=120,$height=50,$verify_nums=4,$verify_type=3,$p_w_picpath_type='png'){$this->width=$width;$this->height=$height;$this->verify_nums=$verify_nums;$this->verify_type=$verify_type;$this->p_w_picpath_type=$p_w_picpath_type;$this->verify_code=$this->setVerifyCode();$this->res=$this->createRes();}//唯一供别人调用的输出方法publicfunctionshow(){$this->createRes();$this->fillBackground();$this->fillPix();$this->fillArc();$this->fillVerifyCode();$this->outPutImg();}//准备画布privatefunctioncreateRes(){returnp_w_picpathcreatetruecolor($this->width,$this->height);}//创建颜色（深色、亮色）privatefunctioncreateDarkColor(){/*$res=$this->res;$color1=mt_rand(0,120);//red$color2=mt_rand(0,120);//green$color3=mt_rand(0,120);//bluereturnp_w_picpathcolorallocate($res,$color1,$color2,$color3);*/returnp_w_picpathcolorallocate($this->res,mt_rand(0,120),mt_rand(0,120),mt_rand(0,120));}//创建亮色给字符串用privatefunctioncreateLightColor(){returnp_w_picpathcolorallocate($this->res,mt_rand(130,255),mt_rand(130,255),mt_rand(130,255));}//填充背景色privatefunctionfillBackground(){/*$res=$this->res;$x=0;$y=0;$color=$this->createDarkColor();returnp_w_picpathfill($res,$x,$y,$color);*/p_w_picpathfill($this->res,0,0,$this->createDarkColor());}//添加干扰元素privatefunctionfillPix(){$nums=($this->width*$this->height)/20;for($i=0;$i<$nums;$i++){$x=mt_rand(0,$this->width);$y=mt_rand(0,$this->height);p_w_picpathsetpixel($this->res,$x,$y,$this->createDarkColor());}}//添加干扰弧线privatefunctionfillArc(){for($i=0;$i<20;$i++){$cx=mt_rand(0,$this->width);//中心点x坐标$cy=mt_rand(0,$this->height);//中心点y坐标$w=mt_rand(10,$this->width/2);//弧线宽度$h=mt_rand(5,$this->height/2);//弧线高度$s=mt_rand(0,180);//起点角度$e=mt_rand(181,360);//终点角度p_w_picpatharc($this->res,$cx,$cy,$w,$h,$s,$e,$this->createDarkColor());}}//产生验证码字符privatefunctionsetVerifyCode(){$verify_code='';switch($this->verify_type){case1://纯数字的验证码取4个$str=join('',array_flip(range(0,9),$this->verify_nums));break;case2:$str=join('',array_rand(array_flip(range('a','z')),$this->verify_nums));break;case3:$str='qwertyuiplkjhgfdsaxcvbnmQWERTYUPLKJHGFDSAXCVBNM23456789';$str=substr(str_shuffle($str),0,$this->verify_nums);break;default:die('请输入指定验证码的字符类型<br/>');}$verify_code=$str;return$verify_code;}//把字符串弄到画布上$this->fillVerifyCode='abda'//弱类型语言就比较随意privatefunctionfillVerifyCode(){for($i=0;$i<$this->verify_nums;$i++){$every_width=$this->width/$this->verify_nums;/*mt_rand($every_width*0,$every_width);mt_rand($every_width*1,$every_width);mt_rand($every_width*2,$every_width);mt_rand($every_width*3,$every_width);$x=mt_rand((($this-width/$this->verify_nums)*$i)+5,($this-width/$this->verify_nums)*($i+1)-5);*/$x=mt_rand($every_width*$i+10,$every_width*($i+1)-10);$y=mt_rand(10,$this->height-20);p_w_picpathchar($this->res,5,$x,$y,$this->verify_code[$i],$this->createLightColor());}}//输出图片privatefunctionoutPutImg(){header('Content-type:p_w_picpath/'.$this->p_w_picpath_type);$func='p_w_picpath'.$this->p_w_picpath_type;$func($this->res);}publicfunction__get($name){if($name=='verify_code'){return$this->verify_code;}}//销毁资源publicfunction__destruct(){p_w_picpathdestroy($this->res);}}$v=newVerify();$v->show();