function check($text)
{
global $PROB_ALLSAFE, $PROB_ALLSPAM;
$arr = decompose($text);
$result = sql("SELECT * FROM wordlist WHERE word = '*'", 1);
if ($result->num_rows > 0) {
$row = $result->fetch_assoc();
$totalspam = $row['spam'];
$totalsafe = $row['safe'];
} else {
die('Not initialized!');
}
$probpos = 1;
$probneg = 1;
foreach ($arr as $word) {
$result = sql("SELECT * FROM wordlist WHERE word = '{$word}'", 1);
if ($result->num_rows > 0) {
$row = $result->fetch_assoc();
$sp = $row['spam'];
$sf = $row['safe'];
if ($sp == 0 || $sf == 0) {
continue;
}
$probspam = $sp / $totalspam;
$probsafe = $sf / $totalsafe;
$prob = $probspam * $PROB_ALLSPAM / ($probspam * $PROB_ALLSPAM + $probsafe * $PROB_ALLSAFE);
$probpos *= $prob;
$probneg *= 1 - $prob;
} else {
continue;
}
}
$prob = $probpos / ($probpos + $probneg);
return $prob;
}
/**
* Decompose a sequence recusively
*
* @param array $decomp_map Decomposition mapping, passed by reference
* @param string $decomp_seq Decomposition sequence as decimal codepoints separated with a space
* @return string Decomposition sequence, fully decomposed
*/
function decompose(&$decomp_map, $decomp_seq)
{
$ret = array();
foreach (explode(' ', $decomp_seq) as $cp) {
if (isset($decomp_map[$cp])) {
$ret[] = decompose($decomp_map, $decomp_map[$cp]);
} else {
$ret[] = $cp;
}
}
return implode(' ', $ret);
}
