How to create custom helper in Magento 2

- Fire development, Magento 2

Magento 2 Development

First of all, you should create the app/code/Company1/Module1/composer.json file in order to create custom helper in Magento 2:

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Then, create the app/code/Company1/Module1/registration.php file

And make app/code/Company1/Module1/etc/module.xml

You’ve just created a module, and finally it is necessary to create a helper class inside the Helper folder. Create app/code/Company1/Module1/Helper/Data.php

Use it inside controller as follows:

Inside the block:

As you can see, $this->helper is an instance of Data. To overwrite classes, use preference.

app/code/Company1/Module1/etc/di.xml

Alternatively, you can also use plugin, since it is the best way to avoid rewrite conflict. For further information, examine this link.

Source (Stackexchange Question)(Sohel Rana)

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