I use the "core_block_abstract_to_html_after" event in magento 1. What is the equivalent in Magento 2?

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2 Answers 2


It seems that \Magento\Framework\View\Element\AbstractBlock::toHtml haven't such event. You can achieve such result in different ways:

  1. If you need to add some customization for specific block, you can use it's _afterToHtml method.
  2. To customize all block's output globally, use plugin for Magento\Framework\View\Element\AbstractBlock and implement aftreToHtml method. More information available here: http://devdocs.magento.com/guides/v2.0/extension-dev-guide/plugins.html
  • i add afterToHtml method using plugin. it's showing blank page if i return $html i show following error Interceptor could not be converted to string i use this interceptor in my di.xml Magento\Framework\View\Element\AbstractBlock
    – Pratik
    Dec 10, 2015 at 13:01
  • @Pratik, Try to clean var/generation folder. Here is code snippet, which worked for me: <type name="Magento\Framework\View\Element\BlockInterface"> <plugin name="block.plugin" type="Vendor\Module\Model\BlockPlugin" sortOrder="1"/> </type> In Vendor\Module\Model\BlockPlugin I implemented such method: public function afterToHtml($subject, $result) { return "<b>" . $result . "</b>"; } Dec 10, 2015 at 14:11
  • yes you r right Thx for help :)
    – Pratik
    Dec 11, 2015 at 6:42

_afterToHtml is a protected function, plugin only works with public functions. There is a similar event of m1 that you can use in replacement of old 'core_block_abstract_to_html_after', for m2: 'view_block_abstract_to_html_after'.

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