验证码图片类的编写

1.配置文件config.php

 1 <?php 2  3  成都职业高中   /** 4      * 验证码类型 codetype int 0:纯数字 1:纯字符串 2:数字和字符串混合 5      * 验证码长度 length   int 6      * 图片宽度  width int 7      * 图片高度 height int 8      */ 9      return10      [11       'codetype' => 2,12       'length' => 5,13       'width' => 400,怎么夸别人14       'height' => 200,15      ];

2.生成验证码类

<?php    //定义验证码类    class code{        private $length;    //验证码长度        private $codetype;  //类型        private $code;      //验证码        private $width;     //宽度        private $height;    //高度        private $img;       //图片资源        public function __construct()        {            //引入配置文件            $this->config = require_once './config.php';            $this->length = $this->config['length'];            $this->codetype = $this->config['codetype'];            $this->width = $this->config['width'];            $this->height = $this->config['height'];            $this->createcode();        }        protected function createcode()        {            switch($this->codetype){                ca 0:                    $this->code = $this->getnumbercode();                    break;                ca 1:                    $this->code = $this->getcharcode();                    break;                ca 2:                    $this->code = $this->getnumcharcode();                    break;                default:                    die('验证码类型错误,请重新输入!');                    break;            }        }        public function getcode()        {            return $this->code;        }        private function getnumbercode()        {            $number = join('',range(0,9));            return $this->tcode($number);        }        private function getcharcode()        {            $str = join('',range('a','z'));            $str .= strtoupper($str);            return $this->tcode($str);        }        private function getnumcharcode()        {            $number = join('',range(0,9));            $str = join('',ran大语ge('a','z'));            $code = strtoupper($str).$str.$number;            return $this->tcode($code);        }        private function tcode($string)        {            return substr(str_shuffle($string),0,$this->length);        }        //输出图像        public function getimg()        {            //新建画布            $this->createimg();            //画布填充背景色            $this->fillbackground();            //将验证码写入画布            $thi中国医科大学在哪s->fillcode();            //加入干扰点            $this->tdistubpoint();            //设置干扰线            $this->tdiarc();            //显示图像            $this->showimg();        }        protected function createimg()        {  我的妹妹有点怪          $this->img = imagecreatetruecolor($this->width,$this->height);        }        protected function fillbackground()        {            imagefill($this->img,0,0,$this->lightcolor());        }        private function lightcolor()        {            return imagecolorallocate($this->img,mt_rand(130,255),mt_rand(130,255),mt_rand(130,255));        }        private function darkcolor()        {            return imagecolorallocate($this->img,mt_rand(0,120),mt_rand(0,120),mt_rand(0,120));        }        protected function fillcode()        {            $width = ceil($this->width/$this->length);            $height = $this->height/2;            for($i=0;$i<$this->length;$i++){                $x = mt_rand($i*$width+10,($i+1)*$width-10);                $y = mt_rand($height-10,$height+10);                imagechar($this->img,5,$x,$y,$this->code[$i],$this->darkcolor());            }        }        //设置干扰点        protected function tdistubpoint()        {            for($i=0;$i<1000;$i++){                $x = mt_rand(0,$this->width);                $y = mt_rand(0,$this->height);                imagetpixel($this->img,$x,$y,$this->darkcolor());            }        }        //设置干扰线段        protected function tdiarc()        {            for($i=0;$i<2;$i++){                imagearc ( $this->img ,  rand(0,$this->width) ,  rand(0,$this->height) ,  rand($this->width,$this->width*2) ,  rand($this->height,$this->height*2) ,  rand(0,100) ,  rand(280,270) ,  $this->darkcolor() );            }        }        protected function showimg()        {            header('content-type:image/png');            imagepng($this->img);        }    }    $code = new code();    $code ->getimg();