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WordPress Filter Final HTML Output

Here is the code to to filter the final HTML output in WordPress.

function callback($buffer) {
  // modify buffer here, and then return the updated code
  return $buffer;
}

function buffer_start() { ob_start("callback"); }

function buffer_end() { ob_end_flush(); }

add_action('wp_loaded', 'buffer_start');
add_action('shutdown', 'buffer_end');

One of the use case of this is when you want to add “nofollow” rel to all links pointing to external websites.

Narayan Prusty
Create a Feed Reader App using Intel XDKHow to check if someone copied my website

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    spaces will be stripped off, but all other whitespace
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For more help see http://daringfireball.net/projects/markdown/syntax

Narayan Prusty

I am a software engineer specialising in Blockchain, DevOps and Go/JavaScript. This is my personal blog where I write about things that I learn and feel interesting to share.

7 years ago WordPress
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