PHP security filtering code_PHP tutorial

/**
* @name date safe class 0.1
* @author kevin xu
* @copyright kenvin E-mail:gincn@cn.cashboxparty.com MSN:gincn@live.cn
*/
interface dateSafe{
function gincn();
}
class safe extends doSafe implements dateSafe
{
public $safe;
function __construct($safe)
{
parent::__construct($safe); >//Calling the parent class constructor, the error found by netizen javachen
$this->safe = $safe; } function

gincn() {

$this->safe = parent::xss($this->safe);
$this->safe = parent::sql($this->safe); return
$this->safe; } }
class

doSafe
{ protected
$str; function
__construct($str) {

$this->str = $str; } function

xss() { $this->str = trim($this->str); $this->
str = nl2br($this->str); > $this->str =
strip_tags($this->str); $this->str = htmlspecialchars(
$this->str); //Convert the content in the text into HTML entities $this->str = addslashes(
$this->str); return $this->str; } function sql
() { $this->str =
mysql_escape_string
($this->
str
); return $this->str; } } ?>
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TechArticle?php /***@namedatesafeclass0.1 *@authorkevinxu *@copyrightkenvinE-mail:gincn@cn.cashboxparty.comMSN:gincn@live.cn*/ interface dateSafe { function gincn (); } class safe extends d. ..