PHP가 PHPAnalytic을 사용하여 키워드의 중국어 단어 분할을 추출하는 방법은 무엇입니까?

<?php
/**
 * @auther: xxf
 * Date: 2019/8/19
 * Time: 11:04
 */
 
namespace WordAnalysis;
 
/**
 * 中文分词提取关键字
 */
class Analysis
{
    /**
     * Notes:关键字提取
     * @auther: xxf
     * Date: 2019/8/19
     * Time: 11:09
     * @param string $content
     * @param int $num 获取数量
     * @return string
     */
    public static function getKeywords($content = "",$num = 3) {
        if (empty ( $content )) {
            return &#39;&#39;;
        }
 
        require_once &#39;phpanalysis.class.php&#39;;
 
 
        \PhpAnalysis::$loadInit = false;
        $pa = new \PhpAnalysis ( &#39;utf-8&#39;, &#39;utf-8&#39;, false );
        $pa->LoadDict ();
        $pa->SetSource ($content);
        $pa->StartAnalysis ( true );
 
        $tags = $pa->GetFinallyKeywords ($num); // 获取文章中的n个关键字
        return $tags;//返回关键字
    }
 
}

$data['seo']['keyword'] = Analysis::getKeywords($article_info['title']);