php-ml/src/Phpml/Tokenization/WordTokenizer.php

<?php

declare (strict_types = 1);

namespace Phpml\Tokenization;

class WordTokenizer implements Tokenizer
{
    /**
     * @param string $text
     *
     * @return array
     */
    public function tokenize(string $text): array
    {
        $tokens = [];
        preg_match_all('/\w\w+/u', $text, $tokens);

        return $tokens[0];
    }
}