PHP를 사용하여 텍스트 감정 분석 및 감정 인식 모델을 구축하는 방법

require_once 'vendor/autoload.php';

use NlpToolsTokenizersWhitespaceTokenizer;
use NlpToolsDocumentsDocument;
use NlpToolsDocumentsTokensDocument;
use NlpToolsDocumentsSentenceDocument;
use NlpToolsFeatureFactoriesFeatureDictionary;

$doc = new SentenceDocument(
    [new Document('This is a positive sentence.'),
    new Document('This is a negative sentence.')]
);

$tok = new WhitespaceTokenizer();
$doc = new TokensDocument($tok->tokenize($doc->getDocument()));
$doc->applyTransformation(function ($tokens) use ($tok) {
    return $tok->tokenize($tokens);
});
    
$dict = new FeatureDictionary(
    $doc,
    function ($term) {
        return $term;
    }
);

print_r($doc);

require_once 'vendor/autoload.php';

use NlpToolsModelsFeatureBasedNB;
use NlpToolsDocumentsTokensDocument;
use NlpToolsFeatureFactoriesFeatureDictionary;
use NlpToolsFeatureFactoriesDataAsFeatures;
use NlpToolsClassifiersNaiveBayesClassifier;

$training = [
    ['This is a positive sentence.', 'positive'],
    ['This is a negative sentence.', 'negative']
];

$tok = new WhitespaceTokenizer();
$doc = new TokensDocument();
$dict = new FeatureDictionary(
    $doc,
    function ($term) {
        return $term;
    }
);

$feats = new DataAsFeatures($doc, $dict);
$classifier = new NaiveBayesClassifier($feats, $dict, array('positive', 'negative'));
$model = new FeatureBasedNB($classifier);

foreach ($training as $data) {
    $doc->addDocument(new Document($data[0]));
    $feats->addDocument($doc->getDocument());
    $model->train($doc->getDocument(), $data[1]);
}

print_r($model);

require_once 'vendor/autoload.php';

use NlpToolsModelsFeatureBasedNB;
use NlpToolsDocumentsTokensDocument;
use NlpToolsFeatureFactoriesFeatureDictionary;
use NlpToolsFeatureFactoriesDataAsFeatures;
use NlpToolsClassifiersNaiveBayesClassifier;

$tok = new WhitespaceTokenizer();
$doc = new TokensDocument();

$text = 'This is a positive sentence.';
$doc->addDocument(new Document($text));

$dict = new FeatureDictionary(
    $doc,
    function ($term) {
        return $term;
    }
);

$feats = new DataAsFeatures($doc, $dict);
$classifier = new NaiveBayesClassifier($feats, $dict, array('positive', 'negative'));
$model = new FeatureBasedNB($classifier);

$result = $model->classify($doc->getDocument());

echo $text;
echo '情感为：'.$result;