验证码 | phper `blog

PHP验证码类

By admin 2014年5月15日 PHP No Comments

2141

<?php

/**
* 验证码类
* @author LiZeQiao <674531003@qq.com>
* @version
*/

//验证码类
class Verify{
//属性
public $img;
public $w;
public $h;
public $num;
public $code;
public $bgcolor;
public $fcolor;

function __construct($w,$h,$num){
$this->w=$w;
$this->h=$h;
$this->num=$num;
}
//1、创建画布
function create(){
$this->img=imagecreate($this->w,$this->h);
}
//2、准备颜色
function color(){
$this->bgcolor=imagecolorallocate($this->img,0,0,0);
$this->fcolor=imagecolorallocate($this->img,0,255,0);
}
//3、填充画布颜色
function imgfill(){
imagefill($this->img,0,0,$this->bgcolor);
}
//4、准备验证字符串
function code(){
session_start();
$str="1234567890";
$this->code=substr(str_shuffle($str),0,$this->num);
$_SESSION['code']=$this->code;
$fontsize=rand(3,5);
for($i=0;$i<$this->num;$i++){
$x=floor($this->w/$this->num)*$i+3;
$y=rand(0,$this->h-imagefontheight($fontsize));
imagestring($this->img,$fontsize,$x,$y,$this->code{$i},$this->fcolor);
}
}
//5、输出图片
function imgout(){
header("content-type:image/jpeg");
imagejpeg($this->img);
}
//6、销毁资源
function __destruct(){
imagedestroy($this->img);
}
//7、display方法调用所有的方法

function display(){
$this->create();
$this->color();
$this->imgfill();
$this->code();
$this->imgout();
}

}
$img=new Verify(50,30,4);
$img->display();
?>

<?php

/**

* 验证码类

* @author LiZeQiao <674531003@qq.com>

* @version

//验证码类

class Verify{

//属性

public $img;

public $w;

public $h;

public $num;

public $code;

public $bgcolor;

public $fcolor;

function __construct($w,$h,$num){

$this->w=$w;

$this->h=$h;

$this->num=$num;

}

//1、创建画布

function create(){

$this->img=imagecreate($this->w,$this->h);

}

//2、准备颜色

function color(){

$this->bgcolor=imagecolorallocate($this->img,0,0,0);

$this->fcolor=imagecolorallocate($this->img,0,255,0);

}

//3、填充画布颜色

function imgfill(){

imagefill($this->img,0,0,$this->bgcolor);

}

//4、准备验证字符串

function code(){

session_start();

$str="1234567890";

$this->code=substr(str_shuffle($str),0,$this->num);

$_SESSION['code']=$this->code;

$fontsize=rand(3,5);

for($i=0;$i<$this->num;$i++){

$x=floor($this->w/$this->num)*$i+3;

$y=rand(0,$this->h-imagefontheight($fontsize));

imagestring($this->img,$fontsize,$x,$y,$this->code{$i},$this->fcolor);

}

//5、输出图片

function imgout(){

header("content-type:image/jpeg");

imagejpeg($this->img);

}

//6、销毁资源

function __destruct(){

imagedestroy($this->img);

}

//7、display方法调用所有的方法

function display(){

$this->create();

$this->color();

$this->imgfill();

$this->code();

$this->imgout();

}

$img=new Verify(50,30,4);

$img->display();