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<?php |
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/* |
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You may not change or alter any portion of this comment or credits |
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of supporting developers from this source code or any supporting source code |
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which is considered copyrighted (c) material of the original comment or credit authors. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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namespace Xmf; |
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/** |
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* StopWords - facilitate filtering of common or purely connective words for natural language processing |
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* |
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* @category Xmf\StopWords |
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* @package Xmf |
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* @author Richard Griffith <[email protected]> |
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* @author trabis <[email protected]> |
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* @copyright 2011-2016 XOOPS Project (http://xoops.org) |
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* @license GNU GPL 2 or later (http://www.gnu.org/licenses/gpl-2.0.html) |
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* @link http://xoops.org |
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* @see https://en.wikipedia.org/wiki/Stop_words |
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*/ |
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class StopWords |
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{ |
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/** |
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* mbstring encoding |
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*/ |
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const ENCODING = 'UTF-8'; |
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/** @var string[] */ |
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protected $stopwordList = array(); |
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/** |
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* StopWords constructor - load stop words for current locale |
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* |
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* @todo specify locale to constructor, will require shift away from defined constant |
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*/ |
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public function __construct() |
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{ |
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if (!defined('_XMF_STOPWORDS')) { |
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Language::load('stopwords'); |
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} |
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if (defined('_XMF_STOPWORDS')) { |
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$sw = explode(' ', _XMF_STOPWORDS); |
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$this->stopwordList = array_fill_keys($sw, true); |
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} |
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} |
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/** |
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* check - look up a word in a list of stop words and |
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* classify it as a significant word or a stop word. |
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* |
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* @param string $key the word to check |
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* |
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* @return bool True if word is significant, false if it is a stop word |
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*/ |
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public function check($key) |
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{ |
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$key = function_exists('mb_strtolower') |
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? mb_strtolower($key, static::ENCODING) |
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: strtolower($key); |
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return !isset($this->stopwordList[$key]); |
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} |
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} |
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XOOPS /
XoopsCore
