Question

I would like to strip all img tags from a certain text, except for those which contain a certain keyword (e.g. the domain they’re hosted at).

Here’s what I’ve come up with, but I’m afraid it doesn’t work:

 $text = preg_replace("/<img[^>]+(?!keyword)[^>]+\>/i", "", $text); 

Any help would be GREATLY appreciated! 🙂

Answer 1

Use a callback to simplify the task:

$html = preg_replace_callback('/<img\s[^>]+>/i', "cb_keyword", $html);

function cb_keyword($matches) {  // return empty str or original text
    return !strpos($matches[0], "keyword") ? "" : $matches[0];
}

If you are working on HTML snippets using phpQuery/QueryPath would still be possible, but adds more post-processing.