[Wordpress] Filter bad words in comments

functions.php

/**
 * Title: Filter bad words in comments
 * Author: Mattias Ghodsian
 * Description: Filter bad words in comments
 * Donate a cup of coffee: https://www.buymeacoffee.com/mattiasghodsian
 * Donate Eth: 0xBBB96204E45D11C9799c6B12E6eE6F0d4A071Ef5
 **/
function filter_text( $comment_text, $comment = null ) 
{
	$words = ['grym', 'great', 'awesome', 'good'];
	$words = array_map('preg_quote', $words);

	$comment_text = preg_replace_callback('~(?:'.implode('|',$words).')~i', function($matches){
	    return substr($matches[0], 0, 1).str_repeat('*', (strlen($matches[0]) -2) ).substr($matches[0], -1);
	}, $comment_text);
	return $comment_text; 
}
add_filter( 'comment_text', 'filter_text', 10, 2 );