Class Anti-Sql Injection

class antiSql{

public function anti_sql_injection($string){
$string = get_magic_quotes_gpc() ? stripslashes($string) : $string;
$string = mysql_escape_string($string);
return $string;
}
}


Modo de usar esta classe:

$antiSqlObject=new antiSql;

$string=$antiSqlObject->anti_sql_injection("string para realizar a anti-sql injection");