PHP Fatal error on implementing interface methods

Question

Note for the zend folks: I am hoping this won't turn out to be a ZF specific question as I can see this is purely related to PHP (or in general an OOP) but added ZF tag just to see if there is something else I am missing

I am creating a project in ZF 2 where I have a class which is implementing an interface called Service aware class Zend\ServiceManager\ServiceLocatorAwareInterface

Where this interface is very simple

<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\ServiceManager;

interface ServiceLocatorAwareInterface
{
    /**
     * Set service locator
     *
     * @param ServiceLocatorInterface $serviceLocator
     */
    public function setServiceLocator(ServiceLocatorInterface $serviceLocator);

    /**
     * Get service locator
     *
     * @return ServiceLocatorInterface
     */
    public function getServiceLocator();
}

and my implementor class is this (I have removed everything else from this class for the sake of debugging, right now this is full length code in my class)

<?php
namespace FileServer\Service;

use Zend\ServiceManager\ServiceLocatorAwareInterface;
use Zend\Di\ServiceLocatorInterface;

class Data implements ServiceLocatorAwareInterface{

    protected $sl;

    public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
    {
        $this->sl = $serviceLocator;
    }

    public function getServiceLocator()
    {
        return $this->sl;
    }

}

and I have an include statement in the index.php

include( 'E:\myproject\module\FileServer\src\FileServer\Service\Data.php' )

which is throwing PHP fatal error. Below is the complete error message

Fatal error: Declaration of FileServer\Service\Data::setServiceLocator() must be compatible with Zend\ServiceManager\ServiceLocatorAwareInterface::setServiceLocator(Zend\ServiceManager\ServiceLocatorInterface $serviceLocator) in E:\myproject\module\FileServer\src\FileServer\Service\Data.php on line 23

As you can see I am implementing both the getter and setter functions with proper signature but still getting the error. What I am missing/overlooking here?

taxicala · Accepted Answer · 2015-09-23 17:21:59Z

1

Replace:

use Zend\Di\ServiceLocatorInterface;

With:

use Zend\ServiceManager\ServiceLocatorInterface;

As thats the proper interface the method is expecting. Even though they have the same name, the namespace differs.

answered Sep 23, 2015 at 17:21

taxicala

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