Reviews import in magento using csv file

I have task with reviews import using csv.I have csv of all reviews so i need to import reviews in our site i written code for import reviews programatically.

i crearted one file in magento root directory (reviewsimport.php) in that file i written the below code

<?php

// Invoke the Magento environment
require_once 'app/Mage.php';
Mage::app();
$fp = fopen("latestreviews.csv", 'r');
$count = 1;
while ($line = fgetcsv($fp)) {
    $product_id = Mage::getModel("catalog/product")->getIdBySku($line[2]);
    $customer = Mage::getModel("customer/customer");
    $customer->setWebsiteId(Mage::app()->getWebsite()->getId());
    $customer->loadByEmail($line[3]);
    $review = Mage::getModel('review/review');
    $review->setEntityPkValue($product_id); //product id 
    $review->setStatusId(1);
    $review->setTitle($line[2]);
    $review->setDetail($line[1]);
    $review->setEntityId(1);
    $review->setStoreId(Mage::app()->getStore()->getId());
    $review->setStatusId(1); //approved 
    $review->setCustomerId($customer->getId()); //null is for administrator 
    $review->setNickname($customer->getName());
    // $review->setReviewId($review->getId()); 
    $review->setStores(array(Mage::app()->getStore()->getId()));
    // print_r($review->getData());
    $review->save();
    $review->aggregate();
    $rating_options = array(
        1 => array(1, 2, 3, 4, 5), // <== Look at your database table `rating_option` for these vals
    );

    // Now save the ratings
    foreach ($rating_options as $rating_id => $option_ids):
        
            $_rating = Mage::getModel('rating/rating')
                    ->setRatingId($rating_id)
                    ->setReviewId($review->getId())
                    ->addOptionVote($option_ids[$line[0] - 1], $product_id);
            //print_r($_rating->getData());
        
    endforeach;
    echo $count;
    $count++;
}
?>

csv formate like this ::

rate,   reviewdes,    sku,          email

5      description        123456    n.pavan37@gmail.com

next i created csv file for rating besed on code it is also placed under magento root directory reviews.csv

example csv with one line 

then run file in to browser.......keep :)