php防止sql注入函数-discuz版本

$magic_quotes_gpc = get_magic_quotes_gpc(); 
@extract(daddslashes($_COOKIE)); 
@extract(daddslashes($_POST)); 
@extract(daddslashes($_GET)); 
if(!$magic_quotes_gpc) { 
$_FILES = daddslashes($_FILES); 
} 


function daddslashes($string, $force = 0) { 
if(!$GLOBALS['magic_quotes_gpc'] || $force) { 
if(is_array($string)) { 
foreach($string as $key => $val) { 
$string[$key] = daddslashes($val, $force); 
} 
} else { 
$string = addslashes($string); 
} 
} 
return $string; 
}