PHP production graphic verification code code sharing, php graphic verification code code_PHP tutorial

PHP graphic verification code code sharing, PHP graphic verification code code

Effect:

myvcode.class.php: Encapsulates the class for creating verification codes

a28f135e22bbe6b53eab405adaad88d8width = $width;<br>$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; $i1c3d29443c4e273256f32fb1b3e7ccaacodeNum;$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; $i1c3d29443c4e273256f32fb1b3e7ccaapixNum; $i++)<br>{<br>$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; $i1c3d29443c4e273256f32fb1b3e7ccaalineNum; $i++)<br>{<br>$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 output image

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

test.html: Same as img tag reference

<img src="imgcode.php">

You can add an a tag and use js to achieve the effect of changing one picture:

/*Partial refresh to change verification code*/
function changeCode()
{
var imgcode = document.getElementById(‘code’);
var change = document.getElementById(‘change’);
change.onclick = function()
{
/*You must add the following parameters to refresh*/
imgcode.src='code.php?tm'+Math.random();
}
}

code and change are the ids of img and a respectively

PHP image verification code

This is the verification code of phpcms. It has been used on hundreds of thousands of websites and is very easy to use.
72405b63e006daad865bee018dd4323a

http://www.bkjia.com/PHPjc/898291.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/898291.htmlTechArticlePHP production graphic verification code code sharing, php graphic verification code code effect: myvcode.class.php: encapsulation creation verification Code class php /* * file:myvcode.class.php * Verification code class, class name Vcode...