attack HELLO! <script>alert(1);</script><b onmouseover="alert(1);">HELLO!</b>
strip_tags alert(1);HELLO! alert(1);<b onmouseover="alert(1);">HELLO!</b>
strip_tags_smart alert(1);HELLO! alert(1);<b>HELLO!</b>
attack HELLO! <b A="</b>" B="<b>" C="<" onmouseover="alert(1);" X=">">HELLO!</b>
strip_tags HELLO! <b A="/b" B="b" C="" onmouseover="alert(1);" X="">HELLO!</b>
strip_tags_smart HELLO! <b>HELLO!</b>