#前処理 mecab-python3バージョンは1.0.8です
sudo apt-get install mecab libmecab-dev mecab-ipadic-utf8
sudo pip install mecab-python3
pip install unidic-lite

<?php
class sharpPost
{
    /**
     * mecab.pyを使って文章を解析（名詞と形容詞を取り出す）
     * @param $posstData
     * @return array|null
     */
    public function analysis($postData)
    {
        if(!$postData)return null;
        $word = null;
        exec('python py/mecab.py "'.strip_tags(htmlentities($postData)).'"',$output);// 2>&1
        if(is_array($output)){
            foreach($output as $val){
                $analysisWord = explode("\t",$val);
                if(isset($analysisWord[1]) && preg_match('/(名詞|形容詞)/',$analysisWord[1])){
                    $word[] = $analysisWord[0];
                    $word = array_unique($word);
                }
            }
        }
        return $word;
    }
    
    /**
     * 文字列を置き換える処理
     * @param $postData
     * @param $word|null
     * @return string
     */
    public function replacePostData($postData='',$word=null)
    {
        if(is_array($word)){
            foreach($word as $val){
                $postData = preg_replace("/({$val})/u"," #{$val} ",$postData);
            }
        }
        return $postData;
    }
}
$textData = '単なる自分が使いたい機能です、無かったので作ってみただけです。';
$sharpPost = new sharpPost();
$word = $sharpPost->analysis($textData);
print(($sharpPost->replacePostData($textData,$word)).PHP_EOL);

import MeCab
import sys
args = sys.argv
if(args[1]):
    tagger = MeCab.Tagger()
    print(tagger.parse(args[1]))

<?php
$mumei = function()
{
    if($cnt = func_get_args())
    {
        foreach($cnt as $key=>$value)
        {
            print func_get_arg($key);
        }
    }
};
$mumei(1,2,3,4,5,6);