PHP Decode

<?php 
 
if ($_SERVER['REQUEST_METHOD'] === 'POST') { 
  $Body_Json =  file_get_contents('php://input'); 
  $Json_data = $obj = json_decode($Body_Json); 
 
  $host = $Json_data->Database_Host; 
  $dbuser = $Json_data->Database_User; 
  $dbpassword = $Json_data->Password; 
  $dbname = $Json_data->Database_Name; 
 
  $first_name     = $Json_data->First_Name; 
  $last_name      = $Json_data->Last_Name; 
  $admin_name     = $first_name.' '.$last_name; 
  $email          = $Json_data->Email; 
  $login_password = $Json_data->panel_Password; 
  $licence_code = $Json_data->licence_code; 
} 
 
try { 
  $conn = new PDO("mysql:host=$host;dbname=$dbname", $dbuser, $dbpassword); 
  $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 
 
  $install_dir = 'temp/'; 
	$install_file = 'Dooo235b.zip'; 
 
  $zip = new ZipArchive; 
  if ($zip->open($install_file) === TRUE) { 
    $zip->extractTo($install_dir); 
    $zip->close(); 
    unlink($install_file); 
  } else { 
    exit('Invalid File'); 
    deleteDirectory($install_dir, true); 
  } 
 
  $db_file_path = $install_dir."application/config/database.php"; 
  if (!file_exists($db_file_path)){ 
    deleteDirectory($install_dir, true); 
    exit('Something Went Wrong!'); 
  } 
  $db_file = file_get_contents($db_file_path); 
  $is_installed = strpos($db_file, "enter_hostname"); 
 
  $config_file_path = $install_dir."application/config/config.php"; 
  if (!file_exists($config_file_path)){ 
    deleteDirectory($install_dir, true); 
    exit('Something Went Wrong!'); 
  } 
  $config_file = file_get_contents($config_file_path); 
  $is_installed2 = strpos($config_file, "enter_base_url"); 
 
  $sql_file_path = $install_dir."backup/db/database.sql"; 
  if (!file_exists($sql_file_path)){ 
    deleteDirectory($install_dir, true); 
    exit('Something Went Wrong!'); 
  } 
  $sql = file_get_contents($sql_file_path); 
  $is_installed3 = strpos($sql, "first_user_email"); 
 
  //check if Installed Already 
  if (!$is_installed && !$is_installed2 && !$is_installed3) { 
    deleteDirectory($install_dir, true); 
    exit("Seems this app is already installed! You can't reinstall it again."); 
  } 
 
  //check for valid database connection 
  $mysqli = @new mysqli($host, $dbuser, $dbpassword, $dbname); 
  if (mysqli_connect_errno()) { 
      echo ($mysqli->connect_error); 
      deleteDirectory($install_dir, true); 
      exit(); 
  } 
 
  //all input seems to be ok. check required fiels 
  if (!is_file($sql_file_path)) { 
    deleteDirectory($install_dir, true); 
    exit('The database file could not found!'); 
  } 
 
  $db_file = str_replace('enter_hostname', $host, $db_file); 
  $db_file = str_replace('enter_db_username', $dbuser, $db_file); 
  $db_file = str_replace('enter_db_password', $dbpassword, $db_file); 
  $db_file = str_replace('enter_database_name', $dbname, $db_file); 
  file_put_contents($db_file_path, $db_file); 
 
    
  $actualURL = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . '/'; 
  $config_file = str_replace('enter_base_url', $actualURL, $config_file); 
  file_put_contents($config_file_path, $config_file); 
 
 
     
  $sql = str_replace('first_user_full_name', $admin_name, $sql); 
  $sql = str_replace('first_user_email', $email, $sql); 
  $sql = str_replace('first_user_password', md5($login_password), $sql); 
  $sql = str_replace('licence_code', $licence_code, $sql); 
 
  $deafult_api_key = generateRandomString(); 
  $sql = str_replace('deafult_api_key', $deafult_api_key, $sql); 
 
  $mysqli->multi_query($sql); 
  do { 
   
  } while (mysqli_more_results($mysqli) && mysqli_next_result($mysqli)); 
 
  $mysqli->close(); 
 
  deleteDirectory($install_dir."backup/db/", true); 
  folderCopy($install_dir, "../"); 
  deleteDirectory($install_dir, true); 
  echo "Installed Successfully"; 
 
} catch(PDOException $e) { 
  exit('Connection failed'); 
} 
 
 
function generateRandomString($length = 16) { 
  return substr(str_shuffle(str_repeat($x='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', ceil($length/strlen($x)) )),1,$length); 
} 
 
function getFilename($header) { 
  if (preg_match('/filename="(.+?)"/', $header, $matches)) { 
    return $matches[1]; 
  } 
  if (preg_match('/filename=([^; ]+)/', $header, $matches)) { 
    return rawurldecode($matches[1]); 
  } 
  throw new Exception(__FUNCTION__ .": Filename not found"); 
} 
 
function hashDirectory($directory){ 
  if (! is_dir($directory)){ return false; } 
 
  $files = array(); 
  $dir = dir($directory); 
 
  while (false !== ($file = $dir->read())){ 
    if ($file != '.' and $file != '..') { 
      if (is_dir($directory . '/' . $file)) { $files[] = hashDirectory($directory . '/' . $file); } 
      else { $files[] = md5_file($directory . '/' . $file); } 
    } 
  } 
 
  $dir->close(); 
 
  return md5(implode('', $files)); 
} 
 
function folderCopy($source, $dest, $permissions = 0755){ 
      $sourceHash = hashDirectory($source); 
      // Check for symlinks 
      if (is_link($source)) { 
          return symlink(readlink($source), $dest); 
      } 
   
      // Simple copy for a file 
      if (is_file($source)) { 
          return copy($source, $dest); 
      } 
   
      // Make destination directory 
      if (!is_dir($dest)) { 
          mkdir($dest, $permissions); 
      } 
   
      // Loop through the folder 
      $dir = dir($source); 
      while (false !== $entry = $dir->read()) { 
          // Skip pointers 
          if ($entry == '.' || $entry == '..') { 
              continue; 
          } 
   
          // Deep copy directories 
          if($sourceHash != hashDirectory($source."/".$entry)){ 
            folderCopy("$source/$entry", "$dest/$entry", $permissions); 
          } 
      } 
   
      // Clean up 
      $dir->close(); 
      return true; 
} 
 
function deleteDirectory($dir) { 
  if (!file_exists($dir)) { 
    return true; 
  } 
  if (!is_dir($dir)) { 
    return unlink($dir); 
  } 
  foreach (scandir($dir) as $item) { 
    if ($item == '.' || $item == '..') { 
      continue; 
    } 
    if (!deleteDirectory($dir . DIRECTORY_SEPARATOR . $item)) { 
      return false; 
    } 
  } 
  return rmdir($dir); 
} 
?>