PHP - remove html tags from string except <img>

Question

i want to remove all tags except img tag

$words = strip_tags($words, '<img>');

is it useful ?

Answer 1

strip_tags($words, '<img>');

Take a look at the php manual.

Answer 2

Yes, to remove tags.
But strip_tags() won't help against most dangerous thing - an XSS. You will need some regexp, or use http://htmlpurifier.org/ to be sure there are no unwanted parameters in the <omg> tag