PHP 제작 그래픽 인증 코드 코드 Sharing_php 예

효과:

myvcode.class.php: 인증 코드 생성을 위한 클래스를 캡슐화합니다

<&#63;php<br />/*<br />* file:myvcode.class.php<br />* 验证码类,类名Vcode<br />*/<br />class Vcode<br />{<br />private $width;              /*验证码宽度*/<br />private $height;             /*验证码高度*/<br />private $codeNum;            /*验证码字符个数*/<br />private $checkCode;            /*验证码字符*/<br />private $image;                /*验证码资源*/<br />private $pixNum;            /*绘制干扰点的个数*/<br />private $lineNum;            /*绘制干扰线的条数*/

/*<br />*构造方法实例化验证码对象，并初始化数据<br /><a href="mailto:*@param">*@param</a> int $width         设置默认宽度<br /><a href="mailto:*@param">*@param</a> int $height     设置默认高度<br /><a href="mailto:*@param">*@param</a> int $codeNum    设置验证码中的字符个数<br /><a href="mailto:*@param">*@param</a> int $pixNum        设置干扰点的个数<br /><a href="mailto:*@param">*@param</a> int $lineNum    设置干扰线的数量<br />*/<br />function __construct($width=80,$height=40,$codeNum=4,$pixNum=40,$lineNum=5)<br />{<br />$this->width = $width;<br>$this->height = $height;<br>$this->codeNum = $codeNum;<br>$this->pixNum = $pixNum;<br>$this->lineNum = $lineNum;<br>}<br>/*内部私有方法,创建图像资源*/<br>private function getCreateImage()<br>{<br>$this->image = imagecreatetruecolor($this->width, $this->height);<br>$white = imagecolorallocate($this->image,0xff,0xff,0xff);<br>imagefill($this->image, 0, 0, $white);<br>$black = imagecolorallocate($this->image,0,0,0);<br>imagerectangle($this->image, 0, 0, $this->width-1, $this->height-1, $black);<br>}<br>/*内部私有方法,绘制字符，去掉o0Llz和012*/<br>private function createCheckCode()<br>{<br>$code = '3456789abcdefghijkmnpqrstuvwxyABCDEFGHIJKMNPQRSTUVWXY';<br>$this->checkCode = "";<br>for($i=0; $i<$this->codeNum;$i++)<br>{<br>$char = $code{rand(0,strlen($code) - 1)};<br>$this->checkCode .= $char;<br>$fontColor = imagecolorallocate($this->image, rand(0,128), rand(0,128),rand(0,128));<br>$fontSize = rand(3,5);<br>$x = rand(0,$this->width-imagefontwidth($fontSize));<br>$y = rand(0,$this->height-imagefontheight($fontSize));<br>imagechar($this->image, $fontSize, $x, $y, $char, $fontColor);<br>}<br>}<br>/*内部私有方法设置干扰元素*/<br>private function setDisturbColor()<br>{<br>/*绘制干扰点*/<br>for($i=0; $i<$this->pixNum; $i++)<br>{<br>$color = imagecolorallocate($this->image, rand(0,255), rand(0,255), rand(0,255));<br>imagesetpixel($this->image, rand(1,$this->width-2), rand(1,$this->height-2), $color);<br>}<br>/*绘制干扰线*/<br>for($i=0; $i<$this->lineNum; $i++)<br>{<br>$color = imagecolorallocate($this->image, rand(0,255), rand(0,255), rand(0,255));<br>imageline($this->image, rand(1,$this->width / 2), rand(1,$this->height / 2),<br>rand($this->width / 2,$this->width – 2), rand($this->height / 2,$this->height – 2), $color);

}<br>}<br>/*开启session保存 利用echo 输出图像*/<br>function __toString()<br>{<br>$_SESSION['code'] = strtoupper($this->checkCode);<br>$this->getCreateImage();<br>$this->createCheckCode();<br>$this->setDisturbColor();<br>$this->outputImg();<br>}<br>/*内部私有方法输出图像*/<br>private function outputImg()<br>{<br>header("content-type:image/png");<br>imagepng($this->image);<br>}<br>/*析构方法，释放对象*/<br>function __destruct()<br>{<br>imagedestroy($this->image);<br>}<br>}<br>?>

imgcode.php 출력 이미지

<&#63;php
session_start();
require_once('myvcode.class.php');
echo new Vcode();
&#63;>

test.html: img 태그 참조와 동일

<img src="imgcode.php">

태그를 추가하고 js를 사용하여 사진 한 장을 바꾸는 효과를 얻을 수 있습니다.

/*인증 코드를 변경하려면 부분 새로고침*/
함수 변경코드()
{
var imgcode = document.getElementById('code');
var 변경 = document.getElementById('change');
Change.onclick = 함수()
{
/*새로고침하려면 다음 매개변수를 추가해야 합니다*/
imgcode.src='code.php?tm' Math.random();
}
}

code와 Change는 각각 img와 a의 ID입니다