function filter() {
if (is_array($_SERVER)) {
foreach ($_SERVER as $k => $v) {
if (isset($_SERVER[$k])) {
$_SERVER[$k] = str_replace(array('<','>','"',"'",'%3C','%3E','%22','%27','%3c','%3e'), '', $v);
}
}
}
unset($_ENV, $HTTP_GET_VARS, $HTTP_POST_VARS, $HTTP_COOKIE_VARS, $HTTP_SERVER_VARS, $HTTP_ENV_VARS);
filter_slashes($_GET);
filter_slashes($_POST);
filter_slashes($_COOKIE);
filter_slashes($_FILES);
filter_slashes($_REQUEST);
}
function filter_slashes(&$value) {
if (get_magic_quotes_gpc()) return false;
$value = (array) $value;
foreach ($value as $key => $val) {
if (is_array($val)) {
filter_slashes($value[$key]);
} else {
$value[$key] = addslashes($val);
}
}
}
function filter_escape($value) {
if (is_array($value)) {
foreach ($value as $k => $v) {
$value[$k] = filter_str($v);
}
} else {
$value = filter_str($value);
}
return $value;
}
function filter_str($value) {
$value = str_replace(array("\0","%00","\r"), '', $value);
$value = preg_replace(array('/[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F]/','/&(?!(#[0-9]+|[a-z]+);)/is'), array('', '&'), $value);
$value = str_replace(array("%3C",'<'), '<', $value);
$value = str_replace(array("%3E",'>'), '>', $value);
$value = str_replace(array('"',"'","\t",' '), array('"',''',' ',' '), $value);
return $value;
}
function filter_script($value) {
if (is_array($value)) {
foreach ($value as $k => $v) {
$value[$k] = filter_script($v);
}
return $value;
} else {
$parten = array(
"/(javascript:)?on(click|load|key|mouse|error|abort|move|unload|change|dblclick|move|reset|resize|submit)/i",
"/<script(.*?)>(.*?)<\/script>/si",
"/<iframe(.*?)>(.*?)<\/iframe>/si",
"/<object.+<\/object>/isU"
);
$replace = array("\\2", "", "", "");
$value = preg_replace($parten, $replace, $value, -1, $count);
if ($count > 0) {
$value = filter_script($value);
}
return $value;
}
}
function filter_html($value) {
if (function_exists('htmlspecialchars')) return htmlspecialchars($value);
return str_replace(array("&", '"', "'", "<", ">"), array("&", """, "'", "<", ">"), $value);
}
function filter_sql($value) {
$sql = array("select", 'insert', "update", "delete", "\'", "\/\*",
"\.\.\/", "\.\/", "union", "into", "load_file", "outfile");
$sql_re = array("","","","","","","","","","","","");
return str_replace($sql, $sql_re, $value);
}
function filter_dir($fileName) {
$tmpname = strtolower($fileName);
$temp = array('://',"\0", "..");
if (str_replace($temp, '', $tmpname) !== $tmpname) {
return false;
}
return $fileName;
}
function filter_path($path) {
$path = str_replace(array("'",'#','=','`','$','%','&',';'), '', $path);
return rtrim(preg_replace('/(\/){2,}|(\\\){1,}/', '/', $path), '/');
}
function filter_phptag($string) {
return str_replace(array('<?', '?>'), array('<?', '?>'), $string);
}
function str_out($value) {
$badstr = array("&", '"', "'", "<", ">", "%3C", "%3E");
$newstr = array("&", """, "'", "<", ">", "<", ">");
$value = str_replace($newstr, $badstr, $value);
return stripslashes($value);
}
