Disallowing html without striptags()

[brendan3eb]

I want to disallow html, javascript, etc. from my comments, but if a user types in any tags i want the tags to show up as just text when someone is viewing comments, any tips on how to do this?

[ergophobe]

$plain_text = str_replace("<", "&lt;", $html);

or,
$plain_text = htmlspecialchars($html, ENT_QUOTE);

or, the "going nuclear" approach:

$plain_text = htmlentities($html, ENT_QUOTE);