Thinkphp3.2实用篇之计算型验证码示例
2018-09-24 21:36
是不是觉得普通的验证码已经没办法满足,接下来介绍如何将tp现有的验证码改为计算型验证码:
首先找到:ThinkPHP\Library\Think\Verify.class.php
在其中加入以下代码:
public function entry_add($id = ) { $this->length=3; // 图片宽(px) $this->imageW $this->imageW = $this->length*$this->fontSize*1.5 + $this->length*$this->fontSize/2; // 图片高(px) $this->imageH $this->imageH = $this->fontSize * 2.5; // 建立一幅 $this->imageW x $this->imageH 的图像 $this->_image = imagecreate($this->imageW, $this->imageH); // 设置背景 imagecolorallocate($this->_image, $this->bg[0], $this->bg[1], $this->bg[2]); // 验证码字体随机颜色 $this->_color = imagecolorallocate($this->_image, mt_rand(1,150), mt_rand(1,150), mt_rand(1,150)); // 验证码使用随机字体 $ttfPath = dirname(__FILE__) . /Verify/ . ($this->useZh ? zhttfs : ttfs) . /; if(empty($this->fontttf)){ $dir = dir($ttfPath); $ttfs = array(); while (false !== ($file = $dir->read())) { if($file[0] != . && substr($file, -4) == .ttf) { $ttfs[] = $file; } } $dir->close(); $this->fontttf = $ttfs[array_rand($ttfs)]; } $this->fontttf = $ttfPath . $this->fontttf; if($this->useImgBg) { $this->_background(); } if ($this->useNoise) { // 绘杂点 $this->_writeNoise(); } if ($this->useCurve) { // 绘干扰线 $this->_writeCurve(); } // 绘验证码 $code = array(); // 验证码 $symbol=array(+,-); $codeNX = 0; // 验证码第N个字符的左边距 $now_symbol=$symbol[rand(0,1)]; for ($i = 0; $i<$this->length; $i++) { if($i==1){ $code[$i] = $now_symbol; $codeNX += mt_rand($this->fontSize*1.2, $this->fontSize*1.6); imagettftext($this->_image, $this->fontSize,0, $codeNX, $this->fontSize*1.6, $this->_color, $ttfPath.2.ttf, $code[$i]); } else{ $code[$i] = $this->codeSet[mt_rand(0, strlen($this->codeSet)-1)]; $codeNX += mt_rand($this->fontSize*1.2, $this->fontSize*1.6); imagettftext($this->_image, $this->fontSize, mt_rand(-40, 40), $codeNX, $this->fontSize*1.6, $this->_color, $this->fontttf, $code[$i]); } } // 保存验证码 $key = $this->authcode($this->seKey); $str=implode(, $code); eval(\$re=$str;); $code = $this->authcode($re); $secode = array(); $secode[verify_code] = $code; // 把校验码保存到session $secode[verify_time] = NOW_TIME; // 验证码创建时间 session($key.$id, $secode); header(Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate); header(Cache-Control: post-check=0, pre-check=0, false); header(Pragma: no-cache); header(content-type: image/png); // 输出图像 imagepng($this->_image); imagedestroy($this->_image); } public function check_add($code, $id = ) { $key = $this->authcode($this->seKey).$id; // 验证码不能为空 $secode = session($key); if($code===false empty($secode)) { return false; } //验证码是否是数字 if(!is_numeric($code)) { return false; } // session 过期 if(NOW_TIME - $secode[verify_time] > $this->expire) { session($key, null); return false; } if($this->authcode($code) == $secode[verify_code]) { $this->reset && session($key, null); return true; } return false; }
生成方法:
Public function verify(){ import(ORG.Util.Verify); $Verify = new Verify(); $Verify->useNoise = true; $Verify->codeSet = 0123456789; $Verify->useCurve = false; $Verify->entry_add(); }
验证方法:
if (!check_verify($verify,,add)) { $this->error(验证码错误!); return; }
调用的公共方法:
// 检测输入的验证码是否正确,$code为用户输入的验证码字符串 function check_verify($code, $id = ,$type=){ import(ORG.Util.Verify); $verify = new Verify(); if($type=add){ return $verify->check_add($code, $id); } else{ return $verify->check($code, $id); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
文章标题:Thinkphp3.2实用篇之计算型验证码示例
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