public static function loadUserDict($f_name, $options = array())
{
array_push(self::$user_dictname, $f_name);
$content = fopen($f_name, "r");
while (($line = fgets($content)) !== false) {
$explode_line = explode(" ", trim($line));
$word = $explode_line[0];
$freq = $explode_line[1];
$tag = $explode_line[2];
$freq = (double) $freq;
self::$total += $freq;
self::$FREQ[$word] = log($freq / self::$total);
$l = mb_strlen($word, 'UTF-8');
$word_c = array();
for ($i = 0; $i < $l; $i++) {
$c = mb_substr($word, $i, 1, 'UTF-8');
array_push($word_c, $c);
}
$word_c_key = implode('.', $word_c);
self::$trie->set($word_c_key, array("end" => ""));
}
fclose($content);
return self::$trie;
}