CODEWITHSUNDEEP
phpinstantiationindirect-objects
hy-soft
hy-soft

Reputation: 173

Construct an object by indirect variable reference within namespaces

I want PHP to construct an object by indirect variable reference within namespaces. It goes like:

$ArticleObjectIdentifier = 'qmdArticle\excursions_list_item';
$result = new $ArticleObjectIdentifier($parent_obj,$r);

Where qmdArticle is a namespace used and excursions_list_item is the class name - which is usually not hardcoded but read from DB.

I get the following error - when using the above:

Class 'qmdArticle\\excursions_list_item' not found in /media/work/www/mytestarea/control.php on line 1916 ...

index.php

  <?php
namespace hy_soft\qimanfaya\testarea\main;

use hy_soft\qimanfaya\testarea\articles as article;

include_once('article.php');
$ArticleLoader = 'article\excursions_list_item';
$article = new $ArticleLoader();
$article->showcontent();


?>

article.php

<?php namespace hy_soft\qimanfaya\testarea\articles

  class excursions_list_item {  private $content;       function
 __construct()  {
          $this->content = 'This is the article body';

         // parent::__construct($parent,$dbrBaseRec);
            }

    public function showcontent()   {       echo $this->content;    } } 
?>

Upvotes: 0

Views: 183

Answers (1)

hy-soft
hy-soft

Reputation: 173

I finally have found a similar example but it took a while until I actually got it:

The actual trick is using double quotes: >>"<< AND double-slashes >>\<< AND it doesn't work with an alias created like

use hy_soft\qimanfaya\testarea\articles as article;

You have to use the fully qualified class name (FQCN)

$ArticleLoader = "\\hy_soft\\qimanfaya\\testarea\articles\\excursions_list_item";

I would still apreciate any advice how to do it with an alias. Thanks.

Working example: article.php

<?php
namespace hy_soft\qimanfaya\testarea\articles;

class excursions_list_item
{
    private $content;

    function __construct()
    {
         $this->content = 'This is the article body';

        // parent::__construct($parent,$dbrBaseRec);

    }

    public function showcontent()
    {
        echo $this->content;
    }
}
?>

index.php

<?php
namespace hy_soft\qimanfaya\testarea\main;

use hy_soft\qimanfaya\testarea\articles as article;

include_once('article.php');
$ArticleLoader = "\\hy_soft\\qimanfaya\\testarea\articles\\excursions_list_item";
//$ArticleLoader = "\\article\\excursions_list_item"; doesn't work
$article = new $ArticleLoader();
$article->showcontent();


?>

Upvotes: 0

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