Source of: /manual/en/regexp.reference.comments.php
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?>
<div id="regexp.reference.comments" class="section">
<h2 class="title">Comments</h2>
<p class="para">
The sequence (?# marks the start of a comment which
continues up to the next closing parenthesis. Nested
parentheses are not permitted. The characters that make up a
comment play no part in the pattern matching at all.
</p>
<p class="para">
If the <a href="reference.pcre.pattern.modifiers.php" class="link">PCRE_EXTENDED</a>
option is set, an unescaped # character outside a character class
introduces a comment that continues up to the next newline character
in the pattern.
</p>
</div><?php manual_footer(); ?>
