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如何使用php+js實現(xiàn)極驗,拖動滑塊驗證碼驗證表單

發(fā)布時間:2022-03-01 10:32:50 來源:億速云 閱讀:338 作者:小新 欄目:web開發(fā)

這篇文章給大家分享的是有關(guān)如何使用php+js實現(xiàn)極驗,拖動滑塊驗證碼驗證表單的內(nèi)容。小編覺得挺實用的,因此分享給大家做個參考,一起跟隨小編過來看看吧。

  代碼實現(xiàn)

  html文件

  <!DOCTYPEhtml>

  <htmllang="">

  <head>

  <metacharset="utf-8">

  <metahttp-equiv="x-ua-compatible"content="ie=edge">

  <metaname="viewport"content="width=device-width,initial-scale=1">

  <title>極驗滑塊拖動驗證碼-碼農(nóng)社區(qū)-web視頻分享網(wǎng)</title>

  <scripttype="text/javascript"src="tn_code.js?v=35"></script>

  <linkrel="stylesheet"type="text/css"href="style.css?v=27"/>

  <styletype="text/css"></style>

  </head>

  <bodystyle="text-align:center;">

  <divclass="tncode"style="text-align:center;margin:100pxauto;"></div>

  <scripttype="text/javascript">

  $TN.onsuccess(function(){

  //驗證通過

  });

  </script>

  php文件:check.php

  <?php

  require_oncedirname(__FILE__).'/TnCode.class.php';

  $tn=newTnCode();

  if($tn->check()){

  $_SESSION['tncode_check']='ok';

  echo"ok";

  }else{

  $_SESSION['tncode_check']='error';

  echo"error";

  }

  ?>

  主要核心文件:TnCode.class.php

  <?php

  classTnCode

  {

  var$im=null;

  var$im_fullbg=null;

  var$im_bg=null;

  var$im_slide=null;

  var$bg_width=240;

  var$bg_height=150;

  var$mark_width=50;

  var$mark_height=50;

  var$bg_num=6;

  var$_x=0;

  var$_y=0;

  //容錯象素越大體驗越好,越小破解難道越高

  var$_fault=3;

  function__construct(){

  //ini_set('display_errors','On');

  //

  error_reporting(0);

  if(!isset($_SESSION)){

  session_start();

  }

  }

  functionmake(){

  $this->_init();

  $this->_createSlide();

  $this->_createBg();

  $this->_merge();

  $this->_imgout();

  $this->_destroy();

  }

  functioncheck($offset=''){

  if(!$_SESSION['tncode_r']){

  returnfalse;

  }

  if(!$offset){

  $offset=$_REQUEST['tn_r'];

  }

  $ret=abs($_SESSION['tncode_r']-$offset)<=$this->_fault;

  if($ret){

  unset($_SESSION['tncode_r']);

  }else{

  $_SESSION['tncode_err']++;

  if($_SESSION['tncode_err']>10){//錯誤10次必須刷新

  unset($_SESSION['tncode_r']);

  }

  }

  return$ret;

  }

  privatefunction_init(){

  $bg=mt_rand(1,$this->bg_num);

  $file_bg=dirname(__FILE__).'/bg/'.$bg.'.png';

  $this->im_fullbg=imagecreatefrompng($file_bg);

  $this->im_bg=imagecreatetruecolor($this->bg_width,$this->bg_height);

  imagecopy($this->im_bg,$this->im_fullbg,0,0,0,0,$this->bg_width,$this->bg_height);

  $this->im_slide=imagecreatetruecolor($this->mark_width,$this->bg_height);

  $_SESSION['tncode_r']=$this->_x=mt_rand(50,$this->bg_width-$this->mark_width-1);

  $_SESSION['tncode_err']=0;

  $this->_y=mt_rand(0,$this->bg_height-$this->mark_height-1);

  }

  privatefunction_destroy(){

  imagedestroy($this->im);

  imagedestroy($this->im_fullbg);

  imagedestroy($this->im_bg);

  imagedestroy($this->im_slide);

  }

  privatefunction_imgout(){

  if(!$_GET['nowebp']&&function_exists('imagewebp')){//優(yōu)先webp格式,超高壓縮率

  $type='webp';

  $quality=40;//圖片質(zhì)量0-100

  }else{

  $type='png';

  $quality=7;//圖片質(zhì)量0-9

  }

  header('Content-Type:image/'.$type);

  $func="image".$type;

  $func($this->im,null,$quality);

  }

  privatefunction_merge(){

  $this->im=imagecreatetruecolor($this->bg_width,$this->bg_height*3);

  imagecopy($this->im,$this->im_bg,0,0,0,0,$this->bg_width,$this->bg_height);

  imagecopy($this->im,$this->im_slide,0,$this->bg_height,0,0,$this->mark_width,$this->bg_height);

  imagecopy($this->im,$this->im_fullbg,0,$this->bg_height*2,0,0,$this->bg_width,$this->bg_height);

  imagecolortransparent($this->im,0);//16777215

  }

  privatefunction_createBg(){

  $file_mark=dirname(__FILE__).'/img/mark.png';

  $im=imagecreatefrompng($file_mark);

  header('Content-Type:image/png');

  //imagealphablending($im,true);

  imagecolortransparent($im,0);//16777215

  //imagepng($im);exit;

  imagecopy($this->im_bg,$im,$this->_x,$this->_y,0,0,$this->mark_width,$this->mark_height);

  imagedestroy($im);

  }

  privatefunction_createSlide(){

  $file_mark=dirname(__FILE__).'/img/mark2.png';

  $img_mark=imagecreatefrompng($file_mark);

  imagecopy($this->im_slide,$this->im_fullbg,0,$this->_y,$this->_x,$this->_y,$this->mark_width,$this->mark_height);

  imagecopy($this->im_slide,$img_mark,0,$this->_y,0,0,$this->mark_width,$this->mark_height);

  imagecolortransparent($this->im_slide,0);//16777215

  //header('Content-Type:image/png');

  //imagepng($this->im_slide);exit;

  imagedestroy($img_mark);

  }

感謝各位的閱讀!關(guān)于“如何使用php+js實現(xiàn)極驗,拖動滑塊驗證碼驗證表單”這篇文章就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,讓大家可以學(xué)到更多知識,如果覺得文章不錯,可以把它分享出去讓更多的人看到吧!

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