How to include some php class to Joomla tmpls - php

Question

I need to include some php code that must be repeated in many tmpls. How can I do this, may be as class including? And how can I write php file with my class in a right way? In other words I need something like
views/category/tpml/default.php
JLoader::register('MyClass', '/administrator/components/com_mycom/helpers/myclass.php');
$repeatedcode = new MyClass();
echo $resultstr;
views/article/tpml/default.php
JLoader::register('MyClass', '/administrator/components/com_mycom/helpers/myclass.php');
$repeatedcode = new MyClass();
echo $resultstr;
myclass.php
class MyClass {
// some code with string for echo in the end
$resultstr = ...
}
...
UPDATE: #Guilherme thank you! So now it's looking as
The file /mytemplate/html/com_content/article/default.php:
require_once '/administrator/components/com_mycom/helpers/myclass.php';
MyComHelper::myFunction($param);
$newstring = str_replace($find, $replace, $this->item->text);
echo $newstring;
The file administrator/components/com_mycom/helpers/myclass.php:
defined('_JEXEC') or die;
abstract class MyComHelper
{
public static function myFunction($param)
{
$db = &JFactory::getDBO();
$query = $db->getQuery(true);
$query->select($db->quoteName(array('ua', 'ru')))
->from($db->quoteName('#__words'));
$db->setQuery($query);
$results = $db->loadAssocList();
$find = array();
$replace = array();
foreach ($results as $row) {
$find[] = $row['ua'];
$replace[] = $row['ru'];
}
return $find;
return $replace;
}
}
This script replaces every ua words with matched ru words that are stored in my database and it works if I add the script to tmpl directly. But in the case with including when I open a page with an article I see the blank page which contains only a heading and nothing else i.e. content isn't displayed. Maybe a problem with array?

Answer 1

After include the php function in your Helper, you can include it on the tmpl with the require_once
require_once JPATH_COMPONENT.'/helpers/mycom.php';
MycomHelper::myFunction($param);
MycomHelper is the class name of my Helper
com_mycom/helpers/helper.php
<?php
// no direct access
defined('_JEXEC') or die;
// Component Helper
jimport('joomla.application.component.helper');
class MycomHelper
{
public static function dosomething($var)
{
return "Helper say: ".$var;
}
}
In my tmpl of a com_content view (first lines)
components\com_content\views\article\tmpl\default.php
<?php
defined('_JEXEC') or die;
JHtml::addIncludePath(JPATH_COMPONENT . '/helpers');
if(!defined('DS')) { define('DS',DIRECTORY_SEPARATOR); }
require_once JPATH_ROOT.DS."components".DS."com_mycom".DS."helpers".DS."helper.php";
echo MycomHelper::dosomething("hello!!!");
And now, you can see the phrase "Helper say: hello!!!" in every article joomla