php实现点击可刷新验证码

2020-03-22 18:29:03

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$this- checkimage = @imagecreate($this- width,$this- height); $back = imagecolorallocate($this- checkimage,255,255,255); $border = imagecolorallocate($this- checkimage,0,0,0); imagefilledrectangle($this- checkimage,0,0,$this- width - 1,$this- height - 1,$back); // 白色底 imagerectangle($this- checkimage,0,0,$this- width - 1,$this- height - 1,$border); // 黑色边框 private function setDisturbColor() for ($i=0;$i =200;$i++) $this- disturbColor = imagecolorallocate($this- checkimage, rand(0,255), rand(0,255), rand(0,255)); imagesetpixel($this- checkimage,rand(2,128),rand(2,38),$this- disturbColor); private function writeCheckCodeToImage() for ($i=0;$i =$this- codenum;$i++) $bg_color = imagecolorallocate ($this- checkimage, rand(0,255), rand(0,128), rand(0,255)); $x = floor($this- width/$this- codenum)*$i; $y = rand(0,$this- height-15); imagechar ($this- checkimage, rand(5,8), $x, $y, $this- checkcode[$i], $bg_color); function __destruct() unset($this- width,$this- height,$this- codenum); 包含文件 imgcode.php
php session_start(); require_once('CreateImg.html' target='_blank'>class.php'); $image = new ValidationCode('80','20','4'); //图片长度、宽度、字符个数 $image- outImg(); $_SESSION['validationcode'] = $image- checkcode; //存贮验证码到 $_SESSION 中前台文件 demo.php
php session_start(); $test = $_POST['test']; $test = strtoupper(trim($test)); $submit = $_POST['submit']; if(isset($submit)){ if($test==$_SESSION['validationcode']){ echo 'true'; } else { echo 'false';
meta http-equiv="content-type" content="text/html;charset=utf-8" script language="javascript" function newgdcode(obj,url) { obj.src = url+ ' nowtime=' + new Date().getTime(); //后面传递一个随机参数，否则在IE7和火狐下，不刷新图片 /script body img src="imgcode.php" alt="看不清楚，换一张" align="absmiddle" / form method="POST" name="form1" action="image.php" input type="text" name="test" br / input type="submit" name="submit" value="提交" /form /body /head /html 以上就是为大家介绍的php点击验证码即可刷新的全部代码，希望对大家的学习有所帮助。PHP教程

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