I'm trying to include a library/plugin named mPDF. Here is my code:
namespace App\Http\Controllers;
use App\Http\Controllers\Controller;
class HomeController extends Controller {
public function cert() {
require_once base_path('App/Http/Controllers/mpdf/mpdf.php');
$mpdf=new mpdf\mPDF();
return true;
}
}
I keep getting the error:
Cannot declare class mPDF, because the name is already in use
When I comment out the require_once line, I get:
Class 'App\Http\Controllers\mpdf\mPDF' not found
mpdf.php has a class named mPDF. It only has one class with this name. This class appears nowhere else in my project. No other classes have the same name.
Update the name space of your
App/Http/Controllers/mpdf/mpdf.php file
put something on top of the file like :
namespace App\Http\Controllers\MyPDF;
After defining name space in your library class file App/Http/Controllers/mpdf/mpdf.php file, include that class into your controller as
namespace App\Http\Controllers;
use App\Http\Controllers\Controller;
use App\Http\Controllers\MyPDF\mPDF;
class HomeController extends Controller {
public function cert() {
//require_once base_path('App/Http/Controllers/mpdf/mpdf.php');
$mpdf=new mPDF();
return true;
}
}
I would recommend not to create library class as a controller or inside controller directory, create library classes in /app/ directory and provide your own namespace.
Actually Namespaces are same as package name in JAVA, you just need to define proper name space for your class and include your class without any conflict if there are same classes. Same class name and different name space will not cause conflict.
Within App/Http/Controllers/mpdf/mpdf.php file make sure you have the namespace.
namespace App\Http\Controllers\mpdf;
Then change your code to:
namespace App\Http\Controllers;
class HomeController extends Controller {
public function cert() {
$mpdf=new mpdf\mPDF();
return true;
}
}
The use use App\Http\Controllers's within the above code are not required as you're already in the namespace.
Related
I'm currently working on a PHP trait thay will help me to reuse code in some class controllers that I have using Laravel framework.
I wanted to make the trait methods as dynamic as I could but when trying to access to a class that my parent class imported, I get a Class not found exception.
My class controller is as follows:
namespace App\Http\Controllers\Admin;
use App\Models\ {
Curso,
Leccion,
Diapositiva,
ImagenDiapositiva
};
use App\Traits\TestTrait;
class DiapositivasController extends Controller{
use TestTrait;
public function addRecord(Request $request){
$request->class_name = 'ImagenDiapositiva';
$this->addImage($request);
}
}
My Trait:
namespace App\Traits;
trait TestTrait{
public function addImage($request){
$class_name = $request->class_name;
$diapositiva = new $class_name;
//extra code
}
}
So my doubt is, do I have to include the model classes I want to use inside my Trait again or am I doing something else wrong?
if you use new with a variable class name, you have to use the fully qualified class name. I'm guessing new $class_name is the root cause of the issue here, since $class_name would have to be something like: 'App\Models\ImagenDiapositiva' or whatever the full namespace is. Just have to change the call $request->class_name = 'ImagenDiapositiva'; to reflect the full name of the class.
I created a class at Controller folder of Cake project like this:
<?php
class Hi
{
function __construct(){ }
public function hi()
{
echo "hi!";
exit;
}
}
Then in a controller, I tried to include it:
<?php
namespace App\Controller;
use App\Controller\AppController;
include_once "Hi.php";
class MyController extends AppController
{
public function sayHi()
{
$a = new Hi();
$a.hi();
}
}
Here is the error I'm having:
Fatal error: Cannot declare class Hi, because the name is already in use in path\api\src\Controller\Hi.php on line 2
What's going on?
MyController.php and Hi.php are in the same folder. I'm using PHP 7.
Including a file won't make the classes in that file part of the current namespace, as namespaces are a per-file functionality.
http://php.net/...namespaces.importing.php#language.namespaces.importing.scope
Your Hi class will be declared in the global namespace, and your new Hi() will cause PHP to look for it in the current namespace, ie it will look for App\Controller\Hi, which doesn't exist, hence the composer autoloader kicks in, and will map this via a PSR-4 namespace prefix match to src/Controller/Hi.php, which will include the file again, and that's when it happens.
http://www.php-fig.org/psr/psr-4/
Long story short, while using new \Hi() would fix this, you better not include class files manually, or declare them in paths where they do not belong. Instead declare your files and classes in a proper autoloading compatible fashion, that is for example with a proper namespace in a path that matches that namespace, like
namespace App\Utils;
class Hi {
// ...
}
in
src/Utils/Hi.php
I am new in laravel and importing a existing php site.
I created a controller named "List" then i need to create a object of a class, coded in a file which is been include by include_once() as shown,
<?php
namespace App\Http\Controllers;
use App\Http\Controllers\Controller;
$INCLUDE_ROOT = 'path/to/file';
include_once($INCLUDE_ROOT . "ServiceDetails.class.php");
class Lists extends Controller
{
public function show()
{
$objServiceDetails= new ServiceDetails;
.........
........
}
}
But i am getting an error like
Fatal error: Class 'App\Http\Controllers\ServiceDetails' not found
I dont have much idea of namespace "use" and "as".
May be that's why i am not able to solve this problem.
When creating a new object it is searching class in namespace location only, but it should also look in included files, i think.
If there's a namespace in current file, PHP will try to find class in current namespace and if it won't find it, you'll get fatal error. You should open ServiceDetails.class.php class to verify if there is namespace ...; at the beginning of the file (after <?php). If not you can simple add in your Lists file after:
use App\Http\Controllers\Controller;
the following line:
use ServiceDetails
and if it is, you should copy that namespace and add the following line:
use namespaceyoucopied\ServiceDetails;
of course in namespaceyoucopied place you need to put the correct copied namespace so it could look like this:
use A\B\C\ServiceDetails;
You can also look at How to use objects from other namespaces and how to import namespaces in PHP or PHP namespaces manual
You just need to add a use statement for that class so the class in the current file can "see" it.
<?php
namespace App\Http\Controllers;
$INCLUDE_ROOT = 'path/to/file';
include_once($INCLUDE_ROOT . "ServiceDetails.class.php");
use App\Http\Controllers\Controller;
use Namespace\To\ServiceDetails;
class Lists extends Controller
{
public function show()
{
$objServiceDetails= new ServiceDetails;
.........
........
}
}
However, if you are using Laravel and doing this, then you are not using the autoloading feature to its fullest. I recommend you put this file in a namespaced directory in your application and have it follow PSR-4. Then Laravel will load this for you, and it will keep your class file looking clean.
Put the file in a path like the following: /path/to/projectRoot/app/Lib/ServiceDetails.php. Then make the file look like below so it follows PSR-4:
<?php namespace App\Http\Controllers;
use App\Http\Controllers\Controller;
use App\Lib\ServiceDetails;
class Lists extends Controller
{
public function show()
{
$objServiceDetails= new ServiceDetails;
.........
........
}
}
I have a custom class I added to Classes, invoice.php within the Classes folder (\App\Classes).
When using a controller function, I can't execute a static function, says Class not found. I have the namespace and use set up like any other classes, similar to Helpers.php.
Class:
<?php namespace App\Classes;
class invoice {
//
}
?>
Contoller:
<?php namespace App\Http\Controllers;
use App\Classes\invoice;
class CustomerController extends Controller {
//
}
?>
Error:
FatalErrorException in CustomerController.php line 284:
Class 'App\Http\Controllers\invoice' not found
I've been stuck here for two hours and I don't understand what I'm doing wrong. Composer is using psr-4 and the Helpers.php file works fine, but my custom class file doesn't.
Thanks
To follow PSR-4 you need to have your class names initial-caps. The "i" should be capitalized here:
<?php namespace App\Classes;
class Invoice {
//
}
Also fix your use as well. Then when Invoice is used in your controller, it will pick up the correct namespace to use for resolving that class. What's happening currently is it is not finding a matching reference in your use section, so it assumes it is in the same namespace of the controller class that calls it.
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.