PHP Decode

?><?php
	set_time_limit (0);
	$base_url	= '';
	$base_url = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == "on") ? "https" : "http");
	$base_url .= "://".$_SERVER['HTTP_HOST'].'';
	$base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);
	
	if(file_exists("includes/configuration.php") && file_exists("includes/classes/systemconfig.php")) {
		header("Location: ".$base_url);exit;
	}
	
	function validate_email($email) {
		return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $email)) ? FALSE : TRUE;
	}
	
	$install_done = false;
	$dir_perm = array();
	$dir_perm['includes'] = is_writable ( "includes" ) ? true : false;
	$dir_perm['classes'] = is_writable ( "includes/classes" ) ? true : false;
	
	if(isset($_POST['submit'])) {
		$errors = "";
		if(trim($_POST['purchase_code']) == "") {
			$errors .= '<p>Provide Item Purchase Code.</p>';
		}
		if(trim($_POST['website_name']) == "") {
			$errors .= '<p>Provide Website Name.</p>';
		}
		if(trim($_POST['website_meta_description']) == "") {
			$errors .= '<p>Provide Meta Description.</p>';
		}
		if(trim($_POST['website_email']) == "" || !validate_email(trim($_POST['website_email']))) {
			$errors .= '<p>Provide a valid Website email (Contact).</p>';
		}
		if(trim($_POST['database_name']) == "") {
			$errors .= '<p>Provide Database Name.</p>';
		}
		if(trim($_POST['database_user']) == "") {
			$errors .= '<p>Provide Database User.</p>';
		}
		if(trim($_POST['database_password']) == "") {
			$errors .= '<p>Provide Database Password.</p>';
		}
		if(trim($_POST['database_host']) == "") {
			$errors .= '<p>Provide Database Host.</p>';
		}
		
		if(empty($errors)){
			$ch = curl_init("http://documentation-generator.com/api/validator.php?purchase_code=".trim($_POST['purchase_code']));
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
			curl_setopt($ch, CURLOPT_REFERER, $_SERVER['HTTP_HOST']);
			$content = curl_exec($ch);
			curl_close($ch);
			$content_arr = json_decode($content);
			
			if(!isset($content_arr->success) || $content_arr->success == false) {
				if(isset($content_arr->err_msg)){
					$errors = '<p>'.$content_arr->err_msg.'</p>';
				} else {
					$errors = '<p>This is not a valid purchase code for this product.</p>';
				}
			} else {
				$ch = curl_init("http://documentation-generator.com/api/fetchdb.php?purchase_code=".trim($_POST['purchase_code']));
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
				curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
				curl_setopt($ch, CURLOPT_REFERER, $_SERVER['HTTP_HOST']);
				$content = curl_exec($ch);
				curl_close($ch);
				$content_arr = json_decode($content);
				
				if(!isset($content_arr->success) || $content_arr->success == false) {
					$errors = '<p>This is not a valid purchase code for this product.</p>';
				} else {
					$mysqli = @new mysqli(trim($_POST['database_host']), trim($_POST['database_user']), $_POST['database_password'], trim($_POST['database_name']));
					if ($mysqli->connect_error) {
						$errors .= '<p>Can not connect using given database settings.</p>';
					}
					
					if(empty($errors)){
						if($mysqli->multi_query($content_arr->db)){
							sleep(3);
						//Create database file
						$config = "<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	
										define('HTTP_SERVER', '".$base_url."');
										define('HTTPS_SERVER', '".str_replace("http", "https", $base_url)."');
										define('ENABLE_SSL', false);
										
										define('WEBSITE_NAME', '".trim($_POST['website_name'])."');
										
										define('DIR_WS_INCLUDES', 'includes/');
										define('DIR_WS_CLASSES', DIR_WS_INCLUDES . 'classes/');
										define('DIR_WS_MODULES', DIR_WS_INCLUDES . 'modules/');
										define('DIR_WS_FUNCTIONS', DIR_WS_INCLUDES . 'functions/');
										
										\$config_dir = str_replace('\'', '/', realpath(dirname(__FILE__))) . '/';
										define('DIR_FS_ROOT', str_replace('\'', '/', realpath(\$config_dir . '../')) . '/');
										
										define('GZIP_COMPRESSION', 'true');
										define('GZIP_LEVEL', 9);
										
										define('DB_SERVER', '".trim($_POST['database_host'])."');
										define('DB_SERVER_USERNAME', '".trim($_POST['database_user'])."');
										define('DB_SERVER_PASSWORD', '".$_POST['database_password']."');
										define('DB_DATABASE', '".trim($_POST['database_name'])."');
									?>";
						
						$fp = fopen("./includes/configuration.php", "w");
						fwrite($fp, $config);
						fclose($fp);
						
						$config = "<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
									class systemconfig {
										var \$siteurl = '".$base_url."';
										var \$sitename = '".trim($_POST['website_name'])."';
										var \$siteemail = '".trim($_POST['website_email'])."';
										var \$terms_conditions = 'terms_conditions.php';	
										var \$sitedescription = '".trim($_POST['website_meta_description'])."';
										var \$enablesignup = 'true';
										var \$defaultlang = 'en';
										var \$allowedbuttons = 3;
									}
									?>";
						
						$fp = fopen("./includes/classes/systemconfig.php", "w");
						fwrite($fp, $config);
						fclose($fp);
						$install_done = true;
						}else{
							$errors .= '<p>Failed to import database. Please contact support for further assistance on this issue.</p>';
						}
					}
				}
			}
			
		}
	}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>RDGDocumenter Installer</title>
<meta charset="utf-8">
<meta name="description" content="RDGDocumenter Installer">
<meta name="author" content="bcstatic.com">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="shortcut icon" href="img/favicon.png">
<link href="css/bootstrap.min.css" rel="stylesheet">
<link href="css/theme.css" rel="stylesheet">
<link href="css/install.css" rel="stylesheet">
<script src="js/pace.min.js"></script>
<link href='//fonts.googleapis.com/css?family=Open+Sans:400,300' rel='stylesheet' type='text/css'>
<!--[if lt IE 9]>
<script src="//oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="//oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container">
  <div class="form-signin">
    <?php if($install_done == true){ ?>
    <div class="row">
      <p>Your System Installed Successfully. Don't forget to delete install.php. <br />
      		This screen will not appear again therefore save this info. <br />
        <br />
        <strong>Site: </strong><a href="<?php echo $base_url; ?>" target="_blank"><?php echo $base_url; ?></a> <br />
        <br />
        <strong>Username:</strong> admin<br />
        <strong>Password:</strong> admin <br />
        <br />
        Don't forget to change your password</p>
    </div>
    <?php }else{ ?>
    <?php if($dir_perm['includes'] == false || $dir_perm['classes'] == false ) { ?>
    <div class="row">
      <h2>Required Writeable directories</h2>
    </div>
    <div class="row alert alert-danger">
      <p>Some of the directories given below are not writeable</p>
    </div>
    <div class="row"> <strong>includes</strong>
      <?php if($dir_perm['includes']){ ?>
      <div class="row alert alert-danger">Writeable</div>
      <?php } else { ?>
      <div class="row alert alert-danger">Not Writeable</div>
      <?php } ?>
    </div>
    <div class="row"> <strong>includes/classes</strong>
      <?php if($dir_perm['classes']){ ?>
      <div class="row alert alert-danger">Writeable</div>
      <?php } else { ?>
      <div class="row alert alert-danger">Not Writeable</div>
      <?php } ?>
    </div>
    <?php } else { 
		if(!empty($errors)) {?>
    <div class="alert alert-danger"> <?php echo $errors; ?> </div>
    <?php } ?>
    <div class="alert alert-info"><small><a href="http://i.imgur.com/wFF7VMD.gif" target="_blank">See how to get Item Purchase Code</a></small></div>
    <form role="form" name="frmLogin" method="post" action="">
      <h2 class="form-signin-heading">Installer</h2>
      <input type="text" id="purchase_code" name="purchase_code" placeholder="Item Purchase Code (*)" class="form-control first" value="<?php if(isset($_POST['purchase_code'])){echo $_POST['purchase_code'];} ?>" autofocus />
      <input type="text" id="website_name" name="website_name" class="form-control" placeholder="Website Name (*)" value="<?php if(isset($_POST['website_name'])){echo $_POST['website_name'];} ?>" required />
      <input type="text" id="website_meta_description" name="website_meta_description" class="form-control" placeholder="Meta Description" value="<?php if(isset($_POST['website_meta_description'])){echo $_POST['website_meta_description'];} ?>" required />
      <input type="text" id="website_email" name="website_email" class="form-control" placeholder="Website email (Contact) (*)" value="<?php if(isset($_POST['website_email'])){echo $_POST['website_email'];} ?>" required />
      <input type="text" id="database_name" class="form-control" placeholder="Database Name (*)" name="database_name" value="<?php if(isset($_POST['database_name'])){echo $_POST['database_name'];} ?>" required />
      <input type="text" id="database_user" name="database_user" class="form-control" placeholder="Database User (*)" value="<?php if(isset($_POST['database_user'])){echo $_POST['database_user'];} ?>" required />
      <input type="text" id="database_password" name="database_password" class="form-control" placeholder="Database Password (*)" value="<?php if(isset($_POST['database_password'])){echo $_POST['database_password'];} ?>" required autofocus />
      <input type="text" id="database_host" name="database_host" class="form-control last"  placeholder="Database Host (* usually localhost)" value="<?php if(isset($_POST['database_host'])){echo $_POST['database_host'];} ?>" required />
      <button class="btn btn-lg btn-primary btn-block" name="submit" type="submit">Install Now</button>
    </form>
    <?php } ?>
    <?php } ?>
  </div>
</div>
</body>
</html>