PHP
发布时间:2019-11-18 发布网站:大佬教程 code.js-code.com
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<div class="codetitle"><a style="cursOR: pointer" data="51670" class="copybut" id="copybut51670" onclick="doCopy('code51670')"> 代码如下:
<div class="codebody" id="code51670">
<?
php //-------------------------------------
// 文件说明:数学运算验证码
// 文件作者:
jesse Lee
// 最后更新:2008-09-07
//------------------------------------- session_start(
); $sessionvar = 'vdcode'; //Session变量名称
$width = 150; //图像宽度
$height = 20; //图像高度 $operator = '+-*'; //运算符 $code = array(
); $code[] = mt_rand(1,
9);
$code[] = $operator
{mt_rand(0,2)};
$code[] = mt_rand(1,
9);
$codestr = implode('',$cod
E);
eval("\$result = ".implode('',$cod
E).";"
); $code[] = '='; $_SESSION[$sessionvar] = $result; $img = ImageCreate($width,$height
); ImageColorAllocate($img,mt_rand(230,250),250)
); $color = ImageColorAllocate($img,0
); $offset = 0;
foreach ($code as $char)
{ $offset += 20;
$txtcolor = ImageColorAllocate($img,mt_rand(0,255),150),255)
); ImageChar($img,mt_rand(3,5),$offset,mt_rand(1,$char,$txtcolor
); } for ($i
=0; $i<100; $i++)
{ $pxcolor = ImageColorAllocate($img,255)
); ImageSetPixel($img,$width),$height),$pxcolor
); } header('Content-type: image/png'
); ImagePng($img
); ?>