Online PHP editor | refs for 5PIOL

<?php $str = <<<STR This is <a href="http://foo.com">This is #foo</a>. Simple #html-stuff text <a href=\"http://foobar.com#baz\">#simple</a> <span class="simple">simple #simple text text</span> STR; $str = preg_replace('/(?!<a[^<>]*>[^#]+)#(\b[-_\w]+\b)(?![^<]*<\/a>)/', '<a href="/tags/$1">#$1</a>', $str); echo $str;