zf2 view helper across module - php

Question

I created a helper in the application module, and it works perfectly. When I try to load it from another modules, such as user, it tells me that it can not find the class.
Class 'Application \ View \ Helper \ Footertable' not found
I tried to put this code in module.config.php well as the application module even in the same file of the user module.
'view_helpers' => array (
'invokables' => array (
'footertable' => 'Application\View\Helper\Footertable'
)
),
I think it's a problem autoloading class but I can not find information on how to load this helper when you are in another module
I invoke helper in view file using
$this->footertable()
work perfectly in application module but not in user module
any idea?
Hello,
but my code is correct
<?php
namespace Application\View\Helper;
use Zend\View\Helper\AbstractHelper;
class Footertable extends AbstractHelper{
protected $inizioFine;
protected $numero;
public function __invoke($inizioFine,$numero){
$this->inizioFine = $inizioFine;
$this->numero = $numero;
echo sprintf('Mostra %d a %d di %d record',$this->inizioFine['start'],$this->inizioFine['end'],$this->numero);
}
}
the space in config is an copy & past errors.
I still have the same problem: can't load helper from another module
update full error
Fatal error: Class 'Application\View\Helper\Footertable' not found in D:\www\httpdocs\test\vendor\zendframework\zendframework\library\Zend\ServiceManager\AbstractPluginManager.php on line 170
path is
D:\www\httpdocs\test\module\Application\src\View\Helper\Footertable.php

Answer 1

The path you posted doesn't look right. All the files in src for your Application module should be inside a folder called Application, since that's your top level namespace. So the path should be:
D:\www\httpdocs\test\module\Application\src\Application\View\Helper\Footertable.php
That would explain why the helper can't be autoloaded, but I don't understand how it works in the application module if this is the case.

Answer 2

Your configuration seems good. Probably the problem is in your helper class signature.
Since PhpRenderer composes a HelperPluginManager instance to manage helpers, your helper should implement the HelperInterface (1) to be registered correctly. Also you should write an __invoke() method within your helper to invoke it by method call. (2)
So, in your Footertable class, simply extend the AbstractHelper and make sure you have an _invoke() method. This is recommended way to write custom view helpers in documentation.
For example:
<?php
namespace Application\View\Helper;
use Zend\View\Helper\AbstractHelper;
class Footertable extends AbstractHelper
{
public function __invoke()
{
return 'bar';
}
}
And use it in your views like this:
echo $this->footertable();
It should work.
Note: You also have to register all helpers (and other classes) in your module configuration's invokables section without spaces between the backslashes:
Wrong:
'footertable' => 'Application \ View \ Helper \ Footertable'
Correct:
'footertable' => 'Application\View\Helper\Footertable'