ZF2 - TextShortener ViewHelper

Module.php

<?php
/* Beggining of your file */
use Application\View\Helper\TextShortener;

public function getViewHelperConfig()
{
    return array(
        'factories' => array(
            'TextShortener' => function($sm) {
                $locator = $sm->getServiceLocator();
                return new TextShortener();
            },
        ),
    );
}

TextShortener.php

<?php
/**
 * TextShortener - ZF2 ViewHelper
 * $this->TextShortener('Text',10,100,'...');
 *
 * @autor Daniel Salvagni <danielsalvagni@gmail.com>
 */

/* Use your namespace */
namespace Application\View\Helper;

use Zend\View\Helper\AbstractHelper;
 
class TextShortener extends AbstractHelper
{
  /**
   * Will truncate the string with both words and chars count
   */
	protected function both($text, $words, $chars)
	{
		$explodeWords = preg_split('/[\s,]+/', $text);
		if(!count($explodeWords)) return substr($text,0,$chars);

		$newText = "";
		$i       = 1;
		foreach($explodeWords as $word):
			if((strlen($newText)<$chars) || ($i < $words))
				$newText .= " {$word}";
			else break;
			$i++;
		endforeach;
		return $newText;
	}
  
  /**
   * Will truncate the string with the words count 
   */
	protected function words($text, $words)
	{
		return preg_replace('/((\w+\W*){'.$words.'}(\w+))(.*)/', '${1}', $text);
	}
  /**
   *  Will truncate the string with the chars count
   */
	protected function chars($text, $chars)
	{
		if(strlen($text) < $chars) return $text;
		else return substr($text, 0, strpos(substr($text, 0, $chars), ' '));
	}

  /**
   * Invoke the class as a function to execute the actions
   */
  public function __invoke($text, $words=false, $chars=false, $end="...")
  {
  	if($words && $chars):
  		$string = $this->both($text,$words,$chars);
  	elseif($words && !$chars):
  		$string = $this->words($text,$chars);
  	elseif($chars && !$words):
  		$string = $this->chars($text,$chars);
  	else: 
  		$string  = $text;
  	endif;
  	$endChar = (!$end) ? null : $end;
  	return ($string != $text) ? rtrim($string,'.,;:?!¿¡').$endChar : $string ;
  }
}