Zend Framework modules questions and answers

Question: What are the basic steps for create new module?
Suppose you are creating module with name of Album.

Attach module with application.
Open file i.e /config/application.config.php, Add Blog in array like below:
```
return array(
     'modules' => array(
         'Application',
         'Blog'
     ),
     
 );
```
create Album folder inside the module folder.
After creating the Album folder inside modules, Create below folder structure.

Album/
    Module.php
    autoload_classmap.php
    autoload_function.php
    autoload_register.php
    config/
        module.config.php
    public/
        images/
        css/
        js/
    src/
        Album/
            Controller/
                AlbumController.php
            Form/
                AlbumForm.php
            Model/
                Album.php 
    view/
        album/
            album/
                index.phtml
        layout/
            layout.phtml
        error
            index.phtml

Question: How to attach a module in main application?
Go to File config/application.config.php, and add your module name in modules array.
See example below (We have add a module Album).

return array(
     'modules' => array(
         'Application',
         'Album'
     ),
     
 );

Question: What is Service?
A Service is an object in the module that executes complex logic of the application.
Here we do all difficult logic together and gives you easy to understand results.

Question: What are the basic steps for creating the Service?

Create a folder service in-side the module and path will be similar to below:
```
/module/{moduleName}/src/{moduleName}/Service/{Album}Service.php
```
Create a model in-side the module and path will be similar to below:
```
/module/{moduleName}/src/{moduleName}/Model/Post.php
```

Add Following code in controller where you want to use.

use {moduleName}\Service\PostServiceInterface;

Add following in controller (you can use another variable)

protected $postService;
 public function __construct(PostServiceInterface $postService)
     {
         $this->postService = $postService;
     }

Create the Factory class (path: /module/{moduleName}/src/{moduleName}/Factory/{factoryClass}.php)

        'service_manager' => array(
         'invokables' => array(
             '{moduleName}\Service\{Service}' => '{moduleName}\Service\{Service}'
         )

    'controllers'  => array(
         'factories' => array(
             '{moduleName}\Controller\List' => '{moduleName}\Factory\{factoryClass}'
         )

Question: How to set different Db Connections for each module?
There are different module.config.php file inside each module (module/{moduleName/config/module.config.php}.
In this you you can set the database credentials.

 'db' => array(
         'driver'         => 'Pdo',
         'username'       => 'SECRET_USERNAME',  //edit this
         'password'       => 'SECRET_PASSWORD',  //edit this
         'dsn'            => 'mysql:dbname=blog;host=localhost',
         'driver_options' => array(
             \PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
         )
     ),

Web Technology Experts Notes

Tuesday, 8 January 2019