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/****@authorAdministrato

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 
/** 
 * 
 * @author Administrator 
 * 
 */ 
class ValidateCode{ 
 
 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; 
 } 
 } 
 
 public function showImage($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 
 */ 
 public function getCheckCode(){ 
 
 } 
 private function Img_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); 
 } 
 private function setDistructcolor(){ 
 //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); 
 } 
 } 
 private function CreateCheckCode(){ 
 $code='23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ'; 
 $string=''; 
 for ($i = 0; $i < $this->codeNum; $i++) { 
 
 $char=$code{rand(0, strlen($code)-1)}; 
 $string.=$char; 
 } 
 return $string; 
 } 
 private function outputtext($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}); 
 } 
 } 
 } 
 private function outputimage() { 
 
 if (imagetypes() & IMG_GIF) { 
 header("Content-type: image/gif"); 
 imagegif($this->img_resouce); 
 }else if(imagetypes() & IMG_JPEG) { 
 header("Content-type: image/jpeg"); 
 imagejpeg($this->img_resouce); 
 }else if(imagetypes() & IMG_PNG) { 
 header("Content-type: image/png"); 
 imagepng($this->img_resouce); 
 }else { 
 echo "PHP不支持的类型"; 
 } 
 
 
 } 
 private function __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。