PHP preg_replace - String开始使用正斜杠

Question

Trying to use preg_replace to find strings that begin and end with a forward-slash, for example "/Harry/". (has to be preg_replace)

I also need to ignore case and ensure it is an individual word. So far I have the following but I am having little luck getting it to work :(

$old_words[0] = '/\b\/Harry\/\b/i';

$new_words[0] = 'Wizard';

$chat = preg_replace($old_words, $new_words, $chat);

Answer 1

Should your problem really just be the word boundaries \b, then you could try some auxiliary assertions instead:

$old_words[0] = '#(?<!\w)/Harry/(?!\w)#i';

That basically ensures that no letters can occur before or after the slashes.