php實現點擊可重新整理驗證碼，php實現重新整理驗證碼_PHP教程

php實現點擊可重新整理驗證碼，php實現重新整理驗證碼

驗證碼類檔案 CreateImg.class.php

<?php  class ValidationCode { private $width,$height,$codenum; public $checkcode;   //產生的驗證碼 private $checkimage;  //驗證碼圖片 private $disturbColor = ''; //幹擾像素  function __construct($width='80',$height='20',$codenum='4') {   $this->width=$width;   $this->height=$height;   $this->codenum=$codenum; } function outImg() {   //輸出頭   $this->outFileHeader();   //產生驗證碼   $this->createCode();    //產生圖片   $this->createImage();   //設定幹擾像素   $this->setDisturbColor();   //往圖片上寫驗證碼   $this->writeCheckCodeToImage();   imagepng($this->checkimage);   imagedestroy($this->checkimage); }  private function outFileHeader() {   header ("Content-type: image/png"); }  private function createCode() {   $this->checkcode = strtoupper(substr(md5(rand()),0,$this->codenum)); }  private function createImage() {   $this->checkimage = @imagecreate($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);  // 黑色邊框 }  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); } } ?> 

包含檔案 imgcode.php

<?php session_start(); require_once('CreateImg.class.php'); $image = new ValidationCode('80','20','4');  //圖片長度、寬度、字元個數 $image->outImg(); $_SESSION['validationcode'] = $image->checkcode; //存貯驗證碼到 $_SESSION 中 ?>

前台檔案 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'; } } ?>    Image         

以上就是為大家介紹的php點擊驗證碼即可重新整理的全部代碼，希望對大家的學習有所協助。

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