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<?php
function build_tag_pattern($tag) {
return '/' . preg_quote($tag, '/') . '\\s*/';
}
function build_post_subject($listtag, $forumtag, $subject) {
// strip the '[list]' and '[forum]' tags
$tagpat = '/(' . preg_quote($listtag, '/') .
'|' . preg_quote($forumtag, '/') . ')\\s*/';
$subject = preg_replace($tagpat, '', $subject);
// strip leading sequences of Re-equivalents
if (preg_match(
'/^((RE|AW|SV|VS)(\\[\\d+\\])?:\\s*)+/i',
$subject, $m, PREG_OFFSET_CAPTURE
)) {
$subject = substr($subject, $m[0][1]);
}
// ensure nonempty subject
if (trim($subject) == '') {
$subject = '(no subject)';
}
return $subject;
}
?>
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