I am new with php namespaces and I encounter an issue. Here is a resume of my code :
In folder controller:
namespace controller;
require_once 'templates/Singleton.php';
class OrderConfirmationController extends Singleton {
...
}
In sub folder controller/templates:
// class out of any namespace
class Singleton {
...
}
I always have an error message even if I extends OrderConfirmationController with \Singleton.
I am not sure to understand why.
Make sure you include the namespace reference when you extent the singleton class. An easy way would be with a use statement at the top of your controller and and appropriate alias.
use \SingletonNamespace\Singleton as Singleton;
Or
class OrderConfirmationController extends NameSpace\Singleton {
Related
I have created a common class in app/Classes/Common.php
but whenever i try to access a model in a class function.
$new_booking_request = BookingRequest::where('host_id','=',Auth::id())
I am getting this error
Class 'App\Models\BookingRequest' not found
Even other classes like Auth, URL and Cookie are not working.
Is there a way to bring all classes in my Common class scope?
You get this issue when your namespace is wrong you or you forgot to namespace.
Since common.php is inside App/Classes, inside Common.php do somethng like this:
<?php namespace App\Classes;
use View, Auth, URL;
class Common {
//class methods
}
Also ensure your model class has the correct namespace, if BookingRequest.php is located inside App\Models then inside BookingRequest.php do this:
<?php namespace App\Models;
BookingRequest extends \Eloquent {
//other definitions
}
Then if you wish to use BookingRequest.php outside its namespace or in another namespace like so:
<?php namespace App\Classes;
use App\Models\BookingRequest;
use View, Auth, URL;
class Common {
//class methods
}
In Laravel 5 everything is namespaced, make sure your class has a proper namespace and that you are calling it using that same namespace you specified.
To include classes in another class make sure that you use the use keyword to import the necessary classes on top of your class definition. Also you can call the class globally with the \. Ex: \Auth, \URL and \Cookie
For the namespace in L5 here is a quick example:
<?php namespace App\Models;
class BookingRequest {
// class definition
}
then when trying to call that class, either call the full namespace path of the function, or include the function.
<?php
class HomeController extends Controller {
public function index()
{
$newBookingRequest = App\Models\BookingRequest::where('host_id','=',Auth::id());
}
}
OR
<?php namespace App\Controllers;
use App\Models\BookingRequest; // Include the class
class HomeController extends Controller {
public function index()
{
$newBookingRequest = BookingRequest::where('host_id','=',Auth::id());
}
}
PS:
Please use camelCase when defining class attributes and methods as this helps for a better code-styling and naming conventions when using the L5 framework.
I have a base abstract class, say Base.php located at /lib/Helper/Base.php. Now, I have another class, say Awesome.php located at /lib/Helper/Awesome/Awesome.php, and this class needs to extend Base.
I have defined my namespaces as follows:
Base.php
<?php namespace Helper;
abstract class Base
{
}
Awesome.php
<?php namespace Helper\Awesome;
class Awesome extends Base
{
}
Right now, this says that class Base was not found. I tried to use require_once and/or include to the path of Base.php and they also didn't work. What am I doing wrong?
You are including the file, and that is the right thing to do. But you are also using
namespaces.
the namespace is not a folder, that means the namespace 'Helper' is not a folder but a logical hierarchy. In order to use the class Base in he logical namespace Helper the Awesome class needs to extend the Base class with the full logical path i.e. \Helper\Base.
namespace Helper\Awesome;
class Awesome extends \Helper\Base {
}
or use the use/as keyword instead (like c# using statement) .
namespace Helper\Awesome;
use \Helper\Base as Base;
class Awesome extends Base
{
}
more information can be fount at the php.net site.
here is a direct reference: http://php.net/manual/en/language.namespaces.importing.php
I read up quite a bit on namespaces in PHP and I'm still confused.
I have a class in a different folder that is under the namespace Entity (Class A).
I have another class in a different folder that is under the same namespace (Class B), and extends class A.
I get an error saying class A could not be found.
My main question is - do I have to include class A when I create a new instance of class B?
This is my code:
(Class A)
namespace Entity;
//Framework/Entity/BaseModel.php
class BaseModel {
//TODO: IMPLEMENT THIS
public function GetList() {
return null;
}
}
(Class B)
namespace Entity;
//Models/Points.php
class Points extends BaseModel{
public $Id = null;
}
(Main File)
require_once(dirname(dirname(__FILE__)) . '/Models/Points.php');
$points = new Points();
Namespaces have nothing to do with actually including files, those are two completely separate mechanisms. So, yes, you will still have to require_once the file that the class is defined in before you can use it.
Having said that, especially with namespaces, autoloaders are typically used so you don't have to write a ton of require code. If you organise your class files in folders exactly as their namespaces are, it's very easy to autoload their files. See http://php.net/manual/en/language.oop5.autoload.php and https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
Parent class definition must be know on definition of child class.
Even before you create instance of child class.
How otherwise PHP would know what to put inside class you create?
require_once('BaseModel.php')
namespace Entity;
//Models/Points.php
class Points extends BaseModel{
public $Id = null;
}
I have a Symfony bundle where I will have to use a custom class. This class does not have to be accessible from all the website, but just in a controller of this bundle.
I have seen a few solutions relative to the vendors, but this is quite heavy and not necessary in my case.
Does someone have a simpler solution?
This is what namespaces are for.
From php.net:
What are namespaces? In the broadest definition namespaces are a way of encapsulating items.
Simply put, include your namespace at the top of your custom class.
src/Acme/DemoBundle/Model/MyClass.php
<?php
namespace Acme\DemoBundle\Model;
class MyClass { // ...
and use it in your Controller:
src/Acme/SomeOtherBundle/Controller/DefaultController.php
<?php
namespace Acme\SomeOtherBundle\Controller;
// ...
use Acme\DemoBundle\Model\MyClass; # can be used in any class in any bundle
// ...
class DefaultController extends Controller { // ...
Class must be created in Acme\Bundle\Model namespace and folder, not \Class! Who says this?!
// ../src/Acme/Bundle/Model/Utility.php
<?php namespace Acme\Bundle\Model;
class Utility:
..
Using in controllers:
<?php ..
use Acme\Bundle\Model\Utility;
$x = new Utility(); // FINE!:)
Name of file (Utility.php) must be equal to the class name.
I have been searching websites to try and get a handle on using PHP namespaces, but they all seem quite vague but what they're trying to do is easy to understand!
My question is: I have a file called people.php and in it is defined class called people. If I create another file called managers.php in the same folder can I define a class again called people which extends the original people class but in the namespace of managers, if so do I have to 'include' the original people.php and if so do I put the include after the writing: namespace managers?
Namespaces are a way to group your related classes in packages. What you describe could best be put under a single namespace like
<?php // people.php
namespace com\example\johnslibrary\people;
abstract class People {
}
and then
<?php // manager.php
namespace com\example\johnslibrary\people;
require_once 'path/to/People.php'; // can better use autoloading though
class Manager extends People {
}
because a Manager is a subclass of People, so there is not much of a reason to put them into their own namespace. They are specialized People.
If you want to Managers to be in their own namespace, you can do so, but have to use the fully qualified name when using the extends keyword, e.g.
<?php // manager.php
namespace com\example\johnslibrary\managers;
require_once 'path/to/People.php';
class Manager extends \com\example\johnslibrary\people\People {
}
or import the People class first
<?php // manager.php
namespace com\example\johnslibrary\managers;
use com\example\johnslibrary\People as People;
require_once 'path/to/People.php';
class Manager extends People {
}
See the PHP Manual on Namespaces for extensive documentation.
// people.php
<?php
namespace People;
class People {}
// managers.php
<?php
namespace Managers;
require_once __DIR__.'/people.php';
class People extends \People\People {}
I have old PHP Class and i need to use it in new PHP file as for example:index.php has to use iClass.php. But before using the OLD iClass.php i have to modify it as below, so that i can use it in index.php.
iClass.php:
namespace ic;
class iClass {
public static function callMeFromClass() {
echo 'OK - you have called me!';
exit;
}
}
index.php
namespace inex;
require_once 'iClass.php';
use ic\iClass;
iClass::callMeFromClass();