How to create custom service providers in Phalcon?

@daisha 

To create a custom service provider in Phalcon, follow these steps:

1. Create a new PHP class that extends the PhalconDiServiceProvider class.
2. Add a public function named “register” inside the service provider class. This function should accept an instance of the DI container as its argument.
3. Inside the “register” function, define the services that you want to provide. You can use the DI container’s “set” method to register a new service.
4. If your service requires any dependencies, you can inject them into the constructor of your service provider class.
5. Once your custom service provider is defined, you can register it with the DI container by calling the container’s “register” method and passing an instance of your service provider class as an argument.

Example:

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use PhalconDiServiceProviderInterface;
use PhalconDiInterface;

class CustomServiceProvider implements ServiceProviderInterface
{
    protected $dependency;

    public function __construct($dependency)
    {
        $this->dependency = $dependency;
    }

    public function register(DiInterface $di)
    {
        $di->set('customService', function () {
            return new CustomService($this->dependency); // $dependency is injected into the constructor of CustomService
        });
    }
}

class CustomService
{
    protected $dependency;

    public function __construct($dependency)
    {
        $this->dependency = $dependency;
    }

    public function doSomething()
    {
        // Implement your service logic here
    }
}

$di->register(new CustomServiceProvider($dependency));

In the example above, we created a custom service provider class named “CustomServiceProvider” that takes a dependency in its constructor. Then, we defined a new service named “customService” that returns a new instance of a “CustomService” class, which also takes the same dependency in its constructor. Finally, we registered the custom service provider class with the DI container using the “register” method.