STRIP_TAGS ISSUE

[eluser]Leftfield[/eluser]
Hello, i have a code:

Code:

$author = trim(addslashes($_POST['author']));
        $page_author = strip_tags($author);

but

Code:

strip_tags

dosn' work, if i write in
input text:

<font size=""48> dfgdgdgd<font>

html tags is work 2010-06-23 | trwerwr