Regexps are bad at very complicated cases, especially when
things are nested. The typical example is HTML: it's easy enough
to make a simple regexp to grab tags, but to get it really right
and account for all cases (comments, greater than signs within quotes
within HTML tags, multiline tags, etc.) you outgrow the usefullness
of a regular expression and really need something that will
actually parse the string (or file, whatever) that contains
the HTML. Luckily, there are modules that will do just that
for you.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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