Examples of PHP filtering posts and getting sensitive data

/**
* Filter posts in batches and get sensitive data
* by bbs.it-home.org
*/

if (get_magic_quotes_gpc()) {
    $_GET = stripslashes_array($_GET);
    $_POST = stripslashes_array($_POST);
}

function stripslashes_array(&$array) {
while(list($key,$var) = each($array)) {
    if ($key != 'argc' && $key != 'argv' && (strtoupper($key) != $key || ''.intval($key) == "$key")) {
      if (is_string($var)) {
         $array[$key] = stripslashes($var);
}
if (is_array($var))  {
     $array[$key] = stripslashes_array($var);
}
}
}
return $array;
}
//--------------------------
// 替换HTML尾标签,为过滤服务
//--------------------------
function lib_replace_end_tag($str)
{
if (empty($str)) return false;
$str = htmlspecialchars($str);
$str = str_replace( '/', "", $str);
$str = str_replace("\", "", $str);
$str = str_replace(">", "", $str);
$str = str_replace("<", "", $str);
$str = str_replace("<SCRIPT>", "", $str);  </li>
<li>$str = str_replace("</SCRIPT>", "", $str);
$str = str_replace("<script>", "", $str);  </li>
<li>$str = str_replace("</script>", "", $str);
$str=str_replace("select","select",$str);
$str=str_replace("join","join",$str);
$str=str_replace("union","union",$str);
$str=str_replace("where","where",$str);
$str=str_replace("insert","insert",$str);
$str=str_replace("delete","delete",$str);
$str=str_replace("update","update",$str);
$str=str_replace("like","like",$str);
$str=str_replace("drop","drop",$str);
$str=str_replace("create","create",$str);
$str=str_replace("modify","modify",$str);
$str=str_replace("rename","rename",$str);
$str=str_replace("alter","alter",$str);
$str=str_replace("cas","cast",$str);
$str=str_replace("&","&",$str);
$str=str_replace(">",">",$str);
$str=str_replace("<","<",$str);
$str=str_replace(" ",chr(32),$str);
$str=str_replace(" ",chr(9),$str);
$str=str_replace("    ",chr(9),$str);
$str=str_replace("&",chr(34),$str);
$str=str_replace("'",chr(39),$str);
$str=str_replace("",chr(13),$str);
$str=str_replace("''","'",$str);
$str=str_replace("css","'",$str);
$str=str_replace("CSS","'",$str);

return $str;
}