PHP Decode

<?php 
set_time_limit(0); 
date_default_timezone_set("Asia/Bangkok"); 
$app = [ 
	'api_key' => '882a8490361da98702bf97a021ddc14d', 
	'secret' => '62f8ce9f74b12f84c123cc23437a4a32' 
]; 
$email_prefix = [ 
	'gmail.com', 
	'hotmail.com', 
	'yahoo.com', 
	'live.com', 
	'rocket.com', 
	'outlook.com', 
]; 
for(;;){ 
	$randomBirthDay = date('Y-m-d', rand(strtotime('1980-01-01'), strtotime('1995-12-30'))); 
	$names = [ 
		'first' => [ 
			'Akira', 'Amarissa', 'Chandra', 'Charissa', 'Candice', 'Darin', 
		], 
		'last' => [ 
			'SMITH', 'JOHNSON', 'Jecelyn', 'Kristin', 'JONES', 'MILLER' 
		], 
		'mid' => [ 
			'Alexander', 'Anthony', 'Charles', 'Dash', 'David', 'Edward' 
		], 
		'th' => [ 
			'', '', '', '', '', '' 
		], 
		'th1' => [ 
			'', '', '', '', ' ', '' 
		] 
 
		 
	]; 
	$nameth = $names['th'][array_rand($names['th'])]; 
	$nameth2 = $names['th1'][array_rand($names['th1'])]; 
	$randomFirstName = $names['first'][array_rand($names['first'])]; 
	$randomName = $names['last'][array_rand($names['last'])]; 
	$password = 'Palmynaja'.rand(0000,9999999).'@@@@'; 
	$fullName = $randomFirstName.' '.$randomName; 
	$md5Time = md5(time()); 
	$hash = substr($md5Time, 0, 8).'-'.substr($md5Time, 8, 4).'-'.substr($md5Time, 12, 4).'-'.substr($md5Time, 16, 4).'-'.substr($md5Time, 20, 12); 
	$emailRand = strtolower(convert_vi_to_en(str_replace(' ', '', $fullName))).substr(md5(time().date('Ymd',rand(0000,time()))), 0, 6).'@'.$email_prefix[array_rand($email_prefix)]; 
	$gender = (rand(0, 10) > 5 ? 'M' : 'F'); 
	$req = [ 
		'api_key' => $app['api_key'], 
		'attempt_login' => true, 
		'birthday' => $randomBirthDay, 
		'client_country_code' => 'TH', 
		'fb_api_caller_class' => 'com.facebook.registration.protocol.RegisterAccountMethod', 
		'fb_api_req_friendly_name' => 'registerAccount', 
		'firstname' => $nameth, 
		'format' => 'json', 
		'gender' => $gender, 
		'lastname' => $nameth2, 
		'email' => $emailRand, 
		'locale' => 'th_TH', 
		'method' => 'user.register', 
		'password' => $password, 
		'reg_instance' => $hash, 
		'return_multiple_errors' => true	 
	]; 
	ksort($req); 
	$sig = ''; 
	foreach($req as $k => $v){ 
		$sig .= $k.'='.$v; 
	} 
	$ensig = md5($sig.$app['secret']); 
	$req['sig'] = $ensig; 
	$api = 'https://b-api.facebook.com/method/user.register'; 
	$graph = 'https://graph.fb.me/'; 
	 
	$reg = get_curl_proxy($api, $req); 
	@$reg->error_data = json_decode($reg->error_data); 
	$reg->email = $emailRand; 
 
	if(!isset($reg->error_code)){ 
		$fp = fopen('tokenth.log', 'a+'); 
		fwrite($fp, $reg->session_info->access_token."
"); 
		fclose($fp);	 
	} 
}	 
 
 
function get_random_proxy(){ 
      srand ((double)microtime()*1000000); 
      $f_contents = file ("proxy.txt"); 
      $line = $f_contents[array_rand ($f_contents)]; 
      return $line; 
} 
function get_curl_proxy($url = '', $params = [], $post = 1){ 
   
  $agent = "[FBAN/FB4A;FBAV/35.0.0.48.273;FBDM/{density=1.33125,width=800,height=1205};FBLC/th_;FBCR/;FBPN/com.facebook.katana;FBDV/Nexus 7;FBSV/4.1.1;FBBK/0;]"; 
  $proxy_ip = get_random_proxy(); 
  $referer = "http://www.google.com/"; 
 
  $ch = curl_init(); 
  curl_setopt($ch, CURLOPT_URL, $url.(!$post && $params ? '?'.http_build_query($params) : '')); 
  curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); 
  curl_setopt($ch, CURLOPT_PROXY, $proxy_ip); 
  curl_setopt($ch, CURLOPT_REFERER, $referer); 
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
  curl_setopt($ch, CURLOPT_MAXREDIRS, 2); 
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 
  curl_setopt($ch, CURLOPT_USERAGENT, $agent); 
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
  if($post){ 
		$opts[CURLOPT_POST] = true; 
		$opts[CURLOPT_POSTFIELDS] = $params; 
	} 
	curl_setopt_array($ch, $opts); 
	$data = curl_exec($ch); 
	curl_close($ch); 
	return json_decode($data); 
} 
function convert_vi_to_en($str) { 
  $str = preg_replace("/(||||||||||||||||)/", 'a', $str); 
  $str = preg_replace("/(||||||||||)/", 'e', $str); 
  $str = preg_replace("/(||||)/", 'i', $str); 
  $str = preg_replace("/(||||||||||||||||)/", 'o', $str); 
  $str = preg_replace("/(||||||||||)/", 'u', $str); 
  $str = preg_replace("/(||||)/", 'y', $str); 
  $str = preg_replace("/()/", 'd', $str); 
  $str = preg_replace("/(||||||||||||||||)/", 'A', $str); 
  $str = preg_replace("/(||||||||||)/", 'E', $str); 
  $str = preg_replace("/(||||)/", 'I', $str); 
  $str = preg_replace("/(||||||||||||||||)/", 'O', $str); 
  $str = preg_replace("/(||||||||||)/", 'U', $str); 
  $str = preg_replace("/(||||)/", 'Y', $str); 
  $str = preg_replace("/()/", 'D', $str); 
  //$str = str_replace(" ", "-", str_replace("&*#39;","",$str)); 
  return $str; 
  } 
  ?> 
  <meta http-equiv="refresh" content="1">