function nntp_search($stream, $group, $search, $threaded = TRUE)
{
// print("<p>nntp_search(stream=$stream, group='$group', search='$search'</p>\n");
// Get the start and end messages in the group...
$status = nntp_command($stream, "GROUP {$group}", 211);
if ((int) $status != 211) {
nntp_error("We were unable to open the forum '{$group}' for the following " . "reason:", $status, $group);
return NULL;
}
// Read the messages in the group...
$fields = explode(" ", $status);
$status = nntp_command($stream, "XOVER {$fields['2']}-{$fields['3']}", 224);
if ((int) $status != 224) {
nntp_error("We were unable to search the forum '{$group}' for the following " . "reason:", $status, $group);
return NULL;
}
$words = html_search_words($search);
$num_matches = 0;
$matches = NULL;
while ($line = fgets($stream, 1024)) {
$line = rtrim($line);
if ($line == ".") {
break;
}
// print("<pre>" . htmlspecialchars($line) . "</pre>\n");
if ($search == "") {
// Return all matches...
$matches[$num_matches] = $line;
$num_matches++;
} else {
// Search for words...
reset($words);
$fields = explode("\t", $line);
foreach ($words as $word) {
if (stristr($fields[1], $word) || stristr($fields[2], $word)) {
$matches[$num_matches] = $line;
$num_matches++;
break;
}
}
}
}
if ($threaded) {
// Thread the articles...
$threads = array();
$parents = array();
for ($i = 0; $i < sizeof($matches); $i++) {
$fields = explode("\t", $matches[$i]);
$subject = eregi_replace("(re:|\\[[a-z]+\\.[a-z]+\\]) ", "", $fields[1]);
if (array_key_exists($subject, $parents)) {
$threads[$i] = sprintf("%06d%06d", $parents[$subject], $i);
} else {
$parents["{$subject}"] = $i;
$threads[$i] = sprintf("%06d%06d", $i, $i);
}
}
array_multisort($threads, SORT_NUMERIC, $matches);
}
// Return the matches...
return $matches;
}
} else {
$email = "";
}
if ($LOGIN_LEVEL >= AUTH_DEVEL) {
$query .= "{$prefix}(manager_email = '' OR manager_email = '{$email}')";
$prefix = " AND ";
} else {
if ($email != "") {
$query .= "{$prefix}create_user = '******'";
$prefix = " AND ";
}
}
}
if ($search) {
// Convert the search string to an array of words...
$words = html_search_words($search);
// Loop through the array of words, adding them to the query...
$query .= "{$prefix}(";
$prefix = "";
$next = " OR";
$logic = "";
reset($words);
foreach ($words as $word) {
if ($word == "or") {
$next = ' OR';
if ($prefix != '') {
$prefix = ' OR';
}
} else {
if ($word == "and") {
$next = ' AND';