Codeigniter to Laravel

Hello,

How do I make Codeigniter to Laravel?

           
           
           //verify file
           if($this->input->post('verify_file')) {
               
               $uri = $this->db->get_where("listings", array("listingID" => $listingID, 'list_uID' => $userID));
               
               if($uri->num_rows()) {
                   $uri = $uri->row();
                   
                   //try reading the file
                   $file = 'http://' . $uri->listing_url . '/verify_' . $listingID . '.txt';
                   
                    $ch = curl_init();
                    $timeout = 5;
                    curl_setopt($ch, CURLOPT_URL, $file);
                    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
                    $contents = curl_exec($ch);
                    curl_close($ch);

                   if ($contents) {
                       if($contents != md5('verify-' . $listingID)) {
                           echo div_class("Error : File doesn't contain the validation code");
                           exit;
                       }else{
                           $_POST['verified'] = 'Y';
                           unset($_POST['verify_file']);
                       }
                   }// if contenst
                   
               } // if num rows
           }// if verify file

           // verify by meta tags
           if( $this->input->post( 'verify_meta' ) ) {

                $uri = $this->db->get_where("listings", 
                                            array("listingID" => $listingID, 'list_uID' => $userID));
           
                if($uri->num_rows()) {
  
                    $uri = $uri->row();
                   
                    //try reading the file
                    $file = 'http://' . $uri->listing_url;
                    $tags = get_meta_tags( $file );

                    if( count( $tags ) ) {
                        if( isset( $tags[ 'marketplace-site-verification' ] ) ) {
                            $_POST['verified'] = 'Y';
                        }else{
                            die(div_class("Error: We couldn't find meta tag 'marketplace-site-verification'"));
                        }
                    }else{
                        die( div_class("No meta tags detected.") );
                    }


               }

                unset( $_POST[ 'verify_meta' ] );
                unset( $_POST[ 'sbMeta' ] );
           }

           // verify by DNS TXT Record
           if( $this->input->post( 'verify_dns' ) ) {

                $uri = $this->db->get_where("listings", 
                                            array("listingID" => $listingID, 'list_uID' => $userID));
           
                if($uri->num_rows()) {
  
                    $uri = $uri->row();
                   
                    //try reading the file
                    $file = 'http://' . $uri->listing_url;
                    $dns  = dns_get_record( $uri->listing_url, DNS_TXT );
        
                    if( count( $dns ) ) {
                        $found = false;
                        $entries = '';

                        foreach( $dns as $entry ) {
                            if( $entry[ 'type' ] == 'txt' AND $entry[ 'txt' ] == 'marketplace-site-verification-' . $listingID ) {
                                
                                $_POST['verified'] = 'Y';

                                $found = true;   
                            }

                            $entries .= 'TXT: ' . $entry[ 'txt' ] . '<br/>';
                        }              

                        if( !$found ) {
                            echo div_class("Error: We couldn't TXT entry 'marketplace-site-verification'");
                            echo div_class('Following entries were found<br/>' . $entries, 'alert alert-info');
                            exit;
                        }

                    }else{
                        die( div_class("No TXT DNS tags detected. Try again later as it may take up to 24 hours for DNS entries to propagate depending on your provider.") );
                    }


               }

                unset( $_POST[ 'verify_dns' ] );
                unset( $_POST[ 'sbDNS' ] );
           }
           
   
        /*
         * Verify file generate
         */
        public function verify_file() {
            ob_start();
            if(!$this->loggedIn) 
            {
                redirect('/users/login');
                exit;
            }
            
            $id = $this->uri->segment(3);
            $id = abs(intval($id));
            
            if(!$id) die("Invalid Listing ID");
            
            header('Content-type: text/plain');
            header('Content-Disposition: attachment; filename="verify_'.$id.'.txt"');
            
            echo md5('verify-' . $id);

            ob_end_flush();
        }
        
           

Model

class ValidateURL extends CI_Model {

    function __construct()
    {
        // Call the Model constructor
        parent::__construct();
    }
    
    public function isValidURL($url) {
        
        if($url == NULL OR empty($url)) return false;
        
        $ch = curl_init($url);
        
        if (false === $ch)
        {
                return false;
        }
        
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_NOBODY, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, Array("User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15") ); // request as if Firefox
        
        $data = curl_exec($ch);
        curl_close($ch);
        
        if($data) return true;
        if(!$data) return false;
        
    }
    
    public function websiteListed($url) {
        $url = $this->dbURLify($url);
        $rs = $this->db->get_where("listings", array("listing_url" => $url));
        
        return count($rs->result());
    }
    
    public function dbURLify($url) {
        return str_replace(array("http://", "https://", "www."), array("","",""), $url);
    }
    
}