why file_get_content($url) return the empty string : Code:
 
    <?php
    $url = "oooff.com";
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $curl_scraped_page = curl_exec($ch);
    curl_close($ch);
    echo $curl_scraped_page;
    ?>
above code display the blank page why

please anyone help to me