PHP code example of niiknow / bayes

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

niiknow / bayes example snippets

$classifier = new \Niiknow\Bayes();

// teach it positive phrases

$classifier->learn('amazing, awesome movie!! Yeah!! Oh boy.', 'positive');
$classifier->learn('Sweet, this is incredibly, amazing, perfect, great!!', 'positive');

// teach it a negative phrase

$classifier->learn('terrible, shitty thing. Damn. Sucks!!', 'negative');

// now ask it to categorize a document it has never seen before

$classifier->categorize('awesome, cool, amazing!! Yay.');
// => 'positive'

// serialize the classifier's state as a JSON string.
$stateJson = $classifier->toJson();

// load the classifier back from its JSON representation.
$classifier->fromJson($stateJson);

// array containing stopwords
$stopwords = array("der", "die", "das", "the");

// escape the stopword array and implode with pipe
$s = '~^\W*('.implode("|", array_map("preg_quote", $stopwords)).')\W+\b|\b\W+(?1)\W*$~i';

$options['tokenizer'] = function($text) use ($s) {
            // convert everything to lowercase
            $text = mb_strtolower($text);

            // remove stop words
            $text = preg_replace($s, '', $text);

            // split the words
            preg_match_all('/[[:alpha:]]+/u', $text, $matches);

            // first match list of words
            return $matches[0];
        };

$classifier = new \niiknow\Bayes($options);