非常实用的php验证码类
本文实例为大家分享了php验证码类，供大家参考，具体内容如下
<?php
/**
*
*@authorAdministrator
*
*/
classValidateCode{
private$width;
private$height;
private$codeNum;
private$img_resouce;
private$disturbColorNum;
private$checkCode;
function__construct($width=80,$height=20,$codeNum=4){
$this->width=$width;
$this->height=$height;
$this->codeNum=$codeNum;
$this->checkCode=$this->CreateCheckCode();
$number=floor($width*$height/25);
if($number>240-$codeNum){
$this->disturbColorNum=240-$codeNum;
}else{
$this->disturbColorNum=$number;
}
}
publicfunctionshowImage($fontpath=''){
//创建图像背景
$this->Img_resouce();
//var_dump($img_resouce);
//设置干扰元素
$this->setDistructcolor();
//向图像中随机画出文本
$this->outputtext($fontpath);
//输出图像
$this->outputimage();
}
/**
*
*获取随机创建的验证码
*/
publicfunctiongetCheckCode(){
}
privatefunctionImg_resouce(){
//创建一个真彩图像
$this->img_resouce=imagecreatetruecolor($this->width,$this->height);
//随机设置图像背景
$backcolor=imagecolorallocate($this->img_resouce,rand(225,255),rand(225,255),rand(225,255));
//填充颜色
imagefill($this->img_resouce,0,0,$backcolor);
//设置边框背景
$border=imagecolorallocate($this->img_resouce,0,0,0);
//画一个矩形
imagerectangle($this->img_resouce,0,0,$this->width-1,$this->height-1,$border);
}
privatefunctionsetDistructcolor(){
//绘画干扰点
for($i=0;$i<$this->disturbColorNum;$i++){
imagesetpixel($this->img_resouce,rand(1,$this->width-2),rand(1,$this->height-2),rand(0,255));
}
//绘画干扰线
for($j=0;$j<3;$j++){
$linecolor=imagecolorallocate($this->img_resouce,rand(0,255),rand(0,255),rand(0,255));
imagearc($this->img_resouce,rand(0,$this->width),rand(0,$this->height),
rand(10,225),rand(20,150),
55,44,$linecolor);
}
}
privatefunctionCreateCheckCode(){
$code='23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ';
$string='';
for($i=0;$i<$this->codeNum;$i++){
$char=$code{rand(0,strlen($code)-1)};
$string.=$char;
}
return$string;
}
privatefunctionoutputtext($fontpath=''){
for($i=0;$i<$this->codeNum;$i++){
$fontcolor=imagecolorallocate($this->img_resouce,rand(0,128),rand(0,128),rand(0,128));
if($fontpath==''){
$fontsize=rand(3,5);
$x=floor($this->width/$this->codeNum)*$i+3;
$y=rand(0,$this->height-20);
imagechar($this->img_resouce,$fontsize,$x,$y,$this->checkCode{$i},$fontcolor);
}else{
$fontsize=rand(12,16);
$x=floor(($this->width-8)/$this->codeNum)*$i+8;
$y=rand($fontsize,$this->height-15);
imagettftext($this->img_resouce,$fontsize,rand(-45,45),$x,$y,$fontcolor,fontpath,$this->checkCode{$i});
}
}
}
privatefunctionoutputimage(){
if(imagetypes()&IMG_GIF){
header("Content-type:image/gif");
imagegif($this->img_resouce);
}elseif(imagetypes()&IMG_JPEG){
header("Content-type:image/jpeg");
imagejpeg($this->img_resouce);
}elseif(imagetypes()&IMG_PNG){
header("Content-type:image/png");
imagepng($this->img_resouce);
}else{
echo"PHP不支持的类型";
}
}
privatefunction__destruct(){
imagedestroy($this->img_resouce);
}
}
?>
以上就是本文的全部内容，希望对大家的学习有所帮助。