Filter all bad words from array

badWords.php

<?php

    class BadWordFilter
    {

        /**
         * @var array
         **/
        public $badWords = ['fuck', 'idiot'];


        /**
         * Replace bad words
         *
         * @param $text
         *
         * @return mixed
         **/
        public function filter($text)
        {
            // Collect all words been pushed.
            $replacedWord = [];

            foreach ($text as $badWord) {

                // Option 1.
                // Get Length of word to add right number of stars(***).
                $length = strlen($badWord);

                // Show first character and change last characters to stars(***).
                $newWord = substr($badWord, 0, 1) . str_repeat('*', $length - 1);


                // option 2.
                // Show first character and change last characters to stars(***).
                // $newWord = preg_replace('/(?!^)\S/', '*', $badWord);
              
                array_push($replacedWord, $newWord);
            }


            return $replacedWord;
        }
    }

    $words = (new BadWordFilter());
    var_dump($words->filter($words->badWords));