class Lingua_Stem_Ru { var $VERSION = "0.02"; var $Stem_Caching = 0; var $Stem_Cache = array(); var $VOWEL = '/аеиоуыэюя/'; var $PERFECTIVEGROUND = '/((ив|ивши|ившись|ыв|ывши|ывшись)|((?<=[ая])(в|вши|вшись)))$/'; var $REFLEXIVE = '/(с[яь])$/'; var $ADJECTIVE = '/(ее|ие|ые|ое|ими|ыми|ей|ий|ый|ой|ем|им|ым|ом|его|ого|еых|ую|юю|ая|яя|ою|ею)$/'; var $PARTICIPLE = '/((ивш|ывш|ующ)|((?<=[ая])(ем|нн|вш|ющ|щ)))$/'; var $VERB = '/((ила|ыла|ена|ейте|уйте|ите|или|ыли|ей|уй|ил|ыл|им|ым|ены|ить|ыть|ишь|ую|ю)|((?<=[ая])(ла|на|ете|йте|ли|й|л|ем|н|ло|но|ет|ют|ны|ть|ешь|нно)))$/'; var $NOUN = '/(а|ев|ов|ие|ье|е|иями|ями|ами|еи|ии|и|ией|ей|ой|ий|й|и|ы|ь|ию|ью|ю|ия|ья|я)$/'; var $RVRE = '/^(.*?[аеиоуыэюя])(.*)$/'; var $DERIVATIONAL = '/[^аеиоуыэюя][аеиоуыэюя]+[^аеиоуыэюя]+[аеиоуыэюя].*(?<=о)сть?$/';
function s(&$s, $re, $to) { $orig = $s; $s = preg_replace($re, $to, $s); return $orig !== $s; }
function m($s, $re) { return preg_match($re, $s); }
function stem_word($word) { $word = strtolower($word); $word = strtr($word, 'ё', 'е'); # Check against cache of stemmed words if ($this->Stem_Caching && isset($this->Stem_Cache[$word])) { return $this->Stem_Cache[$word]; } $stem = $word; do { if (!preg_match($this->RVRE, $word, $p)) break; $start = $p[1]; $RV = $p[2]; if (!$RV) break;
# Step 1 if (!$this->s($RV, $this->PERFECTIVEGROUND, '')) { $this->s($RV, $this->REFLEXIVE, '');
if ($this->s($RV, $this->ADJECTIVE, '')) { $this->s($RV, $this->PARTICIPLE, ''); } else { if (!$this->s($RV, $this->VERB, '')) $this->s($RV, $this->NOUN, ''); } }
# Step 2 $this->s($RV, '/и$/', '');
# Step 3 if ($this->m($RV, $this->DERIVATIONAL)) $this->s($RV, '/ость?$/', '');
# Step 4 if (!$this->s($RV, '/ь$/', '')) { $this->s($RV, '/ейше?/', ''); $this->s($RV, '/нн$/', 'н'); }
$stem = $start.$RV; } while(false); if ($this->Stem_Caching) $this->Stem_Cache[$word] = $stem; return $stem; }
function stem_caching($parm_ref) { $caching_level = @$parm_ref['-level']; if ($caching_level) { if (!$this->m($caching_level, '/^[012]$/')) { die(__CLASS__ . "::stem_caching() - Legal values are '0','1' or '2'. '$caching_level' is not a legal value"); } $this->Stem_Caching = $caching_level; } return $this->Stem_Caching; }
function clear_stem_cache() { $this->Stem_Cache = array(); }}?>
Пример использования:
$stemmer = new Lingua_Stem_Ru();echo $stemmer->stem_word('Котеровыми');