一个简单实用的php验证码类,分享出来 ,供大家参考。
代码如下:
以上就是本节 php教程 提供的例子,php验证码在实际的编程中用的比较多,用户注册、会员评论等功能中都会用到,好好学习下吧。
<?php- /**
- @ php 验证码类
- @ http://www.jbxue.com
- */
- Class code
- {
- var $width =80; //图片的宽
- var $hight =50; //图片的高
- var $image;
- var $red =69; //图片的RGB颜色
- var $green =188; //红
- var $blue =105 ;//绿
- var $pix =100 ;//蓝
- var $pixcolor; //杂色颜色;
- var $pixred = 255 ; //红
- var $pixgreen = 255;//绿
- var $pixblue = 255; //蓝
- var $txt=null;//验证码文字
- var $txtcode=null;
- var $txtsub=null;
- var $pixnum = 300; //杂点数量
- var $i=0;
- var $widthpx=0;
- var $highty=0;
- var $txtreg=20;
- var $txtgreen=30;
- function createimage() //创建一张图并填色
- {
- $this->image = imagecreate($this->width,$this->hight);
- $this->color = imagecolorallocate($this->image,$this->red,$this->green,$this->blue);
- return imagefill($this->image,0,0,$this->color);
- }
- function createpix() //干扰因素
- {
- for($this->i=1;$this->i<$this->pixnum;$this->i++)
- {
- $this->widthpx = rand(0,$this->width);
- $this->highty = rand(0,$this->hight);
- $this->pixcolor = imagecolorallocate($this->image,$this->pixred,$this->pixgreen,$this->pixblue);
- imagesetpixel($this->image,$this->widthpx,$this->highty,$this->pixcolor);
- }
- }
- function gettxt() //创建验证码文字
- {
- $this->txt = array("A","B","C","D","E","F","G","H","I","M","Y","a","b","e","u","v","w","x","y","z","1","2","3","4","5","6","7","8","9","0");
- for($this->i=0;$this->i<6;$this->i++)
- {
- $this->sub = $this->txt[rand(0,29)];
- $this->txtcode.= $this->sub;
- }
- session_start();
- $_SESSION["code"] = $this->txtcode;
- }
- function createstring() //创建验证码图片
- {
- imagettftext($this->image,20,5,0,40,$this->pixcolor,"C:WINDOWSFontssimsun.ttc ",$this->txtcode);
- header("content-type:image/png");
- return imagepng($this->image);
- imagedestroy($this->image);
- }
- function getcodeimage()//获得验证码图片
- {
- $this->createimage();
- $this->createpix();
- $this->gettxt();
- $this->createstring();
- }
- }
- ?>
- <?php
- $text = new code;
- $text->createimage();
- $text->gettxt();
- $text->createpix();
- $text->createstring();
- ?>