function that removes the HTML tags along with their contents in php

function strip_tags_content($text, $tags = '', $invert = FALSE) {

preg_match_all('/<(.+?)[\s]*\/?[\s]*>/si', trim($tags), $tags);
$tags = array_unique($tags[1]);

if(is_array($tags) AND count($tags) > 0) {
if($invert == FALSE) {
return preg_replace('@<(?!(?:'. implode('|', $tags) .')\b)(\w+)\b.*?>.*?@si', '', $text);
}
else {
return preg_replace('@<('. implode('|', $tags) .')\b.*?>.*?@si', '', $text);
}
}
elseif($invert == FALSE) {
return preg_replace('@<(\w+)\b.*?>.*?@si', '', $text);
}
return $text;
}
Sample text:
$text = 'sample text with

tags

';

Result for strip_tags($text):
sample text with tags