<?php
// Anti Bot Links 2.00
// by bit.makejar.com NeedIfFindIt https://bitcointalk.org/index.php?action=profile;u=391838
// working demo at http://bit.makejar.com/labs/anti-bot-links-200/
// instructions at http://bit.makejar.com/labs/anti-bot-links-200/install.php
class antibotlinks {
var $link_count=3;
var $links_data=array();
var $link_counter=0;
var $use_gd=true;
public function antibotlinks($use_gd=true) {
$this->use_gd=$use_gd;
}
public function generate($link_count=3, $force_regeneration=false) {
$this->link_count=$link_count;
if ((!$force_regeneration)&&
(isset($_SESSION['antibotlinks']))&&
(is_array($_SESSION['antibotlinks']))&&
((isset($_POST['antibotlinks']))||($_SESSION['antibotlinks']['time']>time()-180))) {
return true;
}
if ($this->link_count<3) {
$this->link_count=3;
}
if ($this->link_count>5) {
$this->link_count=5;
}
$word_universe=array();
$word_universe[]=array('one'=>'1', 'two'=>'2', 'three'=>'3', 'four'=>'4', 'five'=>'5', 'six'=>'6', 'seven'=>'7', 'eight'=>'8', 'nine'=>'9', 'ten'=>'10');
$word_universe[]=array('1'=>'one', '2'=>'two', '3'=>'three', '4'=>'four', '5'=>'five', '6'=>'six', '7'=>'seven', '8'=>'eight', '9'=>'nine', '10'=>'ten');
$word_universe[]=array('1'=>'I', '2'=>'II', '3'=>'III', '4'=>'IV', '5'=>'V', '6'=>'VI', '7'=>'VII', '8'=>'VIII', '9'=>'IX', '10'=>'X');
$word_universe[]=array('cat'=>'c@t', 'dog'=>'d0g', 'lion'=>'li0n', 'tiger'=>'t!ger', 'monkey'=>'m0nkey', 'elephant'=>'e1eph@nt', 'cow'=>'c0w', 'fox'=>'f0x', 'mouse'=>'m0use', 'ant'=>'@nt');
$word_universe[]=array('2-1'=>'1', '1+1'=>'2', '1+2'=>'3', '2+2'=>'4', '3+2'=>'5', '2+4'=>'6', '3+4'=>'7', '4+4'=>'8', '1+8'=>'9', '5+5'=>'10');
$word_universe[]=array('1'=>'3-2', '2'=>'8-6', '3'=>'1+2', '4'=>'3+1', '5'=>'9-4', '6'=>'3+3', '7'=>'6+1', '8'=>'2*4', '9'=>'3+6', '10'=>'2+8');
$word_universe[]=array('--x'=>'OOX', '-x-'=>'OXO', 'x--'=>'XOO', 'xx-'=>'XXO', '-xx'=>'OXX', 'x-x'=>'XOX', '---'=>'OOO', 'xxx'=>'XXX', 'x-x-'=>'XOXO', '-x-x'=>'OXOX');
// I hope every faucet owner will make his own word universes
// that way there will be no single solution to attack all the faucets with the same bot
// keep 10+ items in the universe arrays
// keep the part before => short
// puzzle the people with math and logic instead with complicated language
$universe_number=mt_rand(0, count($word_universe)-1);
$universe=$word_universe[$universe_number];
$antibotlinks_solution='';
$used_keywords_array=array();
$antibotlinks_array=array();
$antibotlinks_array['links']=array();
for ($z=0;$z<$this->link_count;$z++) {
$random_number=mt_rand(1000, 9999);
$antibotlinks_solution.=$random_number.' ';
// Choose the keyword
do {
$keyword=array_rand($universe, 1);
} while (isset($used_keywords_array[$keyword]));
$used_keywords_array[$keyword]=1;
$antibotlinks_array['links'][$z]['link']='<a href="/" rel="'.$random_number.'" class="antibotlinks">Anti-Bot ( '.$universe[$keyword].' )</a>';
$antibotlinks_array['links'][$z]['keyword']=$keyword;
}
$info_array=array();
foreach ($antibotlinks_array['links'] as $link) {
$info_array[]=$link['keyword'];
}
if ($this->use_gd) {
ob_start();
$im = imagecreatetruecolor($this->link_count*50, 16);
$black = imagecolorallocate($im, 0, 0, 0);
$white = imagecolorallocate($im, 1, 1, 1);
imagecolortransparent($im, $black);
imagestring($im, 3, 1, 1, implode(', ', $info_array), $white);
imagepng($im);
$imagedata = ob_get_contents();
ob_end_clean();
$antibotlinks_array['info']='Please click on the Anti-Bot links in the following order <img src="data:image/png;base64,'.base64_encode($imagedata).'" alt="" width="'.($this->link_count*50).'" height="16"/>';
} else {
$antibotlinks_array['info']='Please click on the Anti-Bot links in the following order '.implode(', ', $info_array);
}
shuffle($antibotlinks_array['links']);
$antibotlinks_array['time']=time();
$antibotlinks_array['solution']=trim($antibotlinks_solution);
if (!$force_regeneration) {
$antibotlinks_array['valid']=true;
}
$_SESSION['antibotlinks']=$antibotlinks_array;
return true;
}
public function check() {
if ((trim($_POST['antibotlinks'])==$_SESSION['antibotlinks']['solution'])&&(!empty($_SESSION['antibotlinks']['solution']))) {
$_SESSION['antibotlinks']['valid']=true;
} else {
$_SESSION['antibotlinks']['valid']=false;
}
return $_SESSION['antibotlinks']['valid'];
}
public function show_link() {
if (!empty($_SESSION['antibotlinks']['links'][$this->link_counter]['link'])) {
echo $_SESSION['antibotlinks']['links'][$this->link_counter]['link'].'<br />';
}
$this->link_counter++;
}
public function show_info() {
echo '<p class="alert alert-info">'.$_SESSION['antibotlinks']['info'].'</p>';
}
public function is_valid() {
return $_SESSION['antibotlinks']['valid'];
}
public function get_link_count() {
return count($_SESSION['antibotlinks']['links']);
}
}
?>
