How to use strip_tags with second parameter in CodeIgniter?

问题

How to strip HTML tags, but not all tags? For example i want to have <br>, <b> etc in textareas.

I have this form validation rule:

$this->form_validation->set_rules('user_desc', 'Opis', 'min_length[3]|max_length[200]|xss_clean|strip_tags');

回答1:

Use strip_tags() with the second argument.

$stripped = strip_tags($str, '<b><br>');

You could build an array of allowable elements and then join them for the second argument with...

$allowedElementsJoined = '<' . implode('><', $allowedElements) . '>';

回答2:

Use

strip_tags($string, '<b><br>');

In second parameter you include all the allowed tags.

来源：https://stackoverflow.com/questions/7298944/how-to-use-strip-tags-with-second-parameter-in-codeigniter