一个PHP的有关问题。制作一个升级程序

<br /><?php<br />$sqlfile = array(<br />    '1' => '1.sql',<br />    '2' => '2.sql',<br />    '3' => '3.sql',<br />    '4' => '4.sql',<br />    '5' => '5.sql',<br />);<br /><br />while(1){<br />    // 获取当前版本<br />    $version = mysql_query("select version from version");<br /><br />    if($version>=count($sqlfile)){<br />        break;<br />    }else{<br />        $sql = $sqlfile[$version+1];        <br />        // 读取sql文件然后执行<br />        echo 'update '.($version+1).' success';<br />    }<br />}<br /><br />echo 'update complete';<br />?><br />