php 怎么抑制报错

@include ('config.inc.php');

$x = 8;
$y = 0;
$num = @($x/$y);

//code from phpbb3(common.php)  
// If we are on PHP >= 6.0.0 we do not need some code  
if (version_compare(PHP_VERSION, '6.0.0-dev', '>='))  
{  
   
 define('STRIP', false);  
}  
else  
{  
 @set_magic_quotes_runtime(0);  
  
 // Be paranoid with passed vars  
 if (@ini_get('reGISter_globals') == '1' || strtolower(@ini_get('register_globals')) == 'on' || !function_exists('ini_get'))  
 {  
  deregister_globals();  
 }  
  
 define('STRIP', (get_magic_quotes_gpc()) ? true : false);  
}  
  
//code from phpbb3(style.php)  
$dir = @opendir("{$phpbb_root_path}styles/{$theme['theme_path']}/theme");  
  
//code from phpbb3(adm/index.php)  
                    if (file_exists($phpbb_root_path . $cfg_array[$config_name]) && !@is_writable($phpbb_root_path . $cfg_array[$config_name]))  
                    {  
                        $error[] = sprintf($user->lang['DIRECTORY_NOT_WRITABLE'], $cfg_array[$config_name]);  
                    }  
  
//code from phpbb3(functions.php)  
    if (($fh = @fopen('/dev/urandom', 'rb')))  
    {  
        $random = fread($fh, $count);  
        fclose($fh);  
    }