How to run php code once block is rendered?

Question

I have a custom Block, and I want to run some code before this block will be rendered. How to achieve this?

I don't want to place my code inside Block method and run it from the template.

I don't want to place my code inside __construct, because it's no good for performance.

I think there is a maybe some event in Magento, that I can use for this.

I will be glad to any thoughts. Thanks.

Answer 1

You can use _beforeToHtml method of Magento\Framework\View\Element\AbstractBlock in your block class, it call before rendering html of your block file.