title: PHP preg_match question
body: <p>How can I match the three words in the following string with a Perl compatible regular expression?</p>
  
  <p>word1#$word2#$word3</p>
  
  <p>I don't know the actual words "word1, word2 and word3" in advance. I only know the separator, which is #$.</p>
  
  <p>And I can't use the word boundary as I have a multibyte encoding. This means for instance that the string can contain non-ASCII characters like umlauts which are not detected by the \w control character.</p>