README

This simple PHP package has one simple purpose; to take some HTML (as a string), go through it and add rel="nofollow" to all links, subject to certain exceptions.

So give it this:

<p>Check out our <a href="http://example.com">affordable web design services</a>!</p>

...and you get this:

<p>Check out our <a href="http://example.com" rel="nofollow">affordable web design services</a>!</p>

By default, it will ignore relative links, so this would remain untouched:

<p>Check out the <a href="/about">about</a> page</p>

It will also ignore absolute links to the current domain.

You can also provide a whitelist of domains, and it will skip them.

Installation

composer require lukaswhite/auto-no-follow

Usage

Create an instance:

$processor = new \Lukaswhite\AutoNoFollow\Processor();

Optionally specify the current host:

$processor->setCurrentHost('example.com');    

If you don't set this, it'll grab it from $_SERVER['HTTP_HOST']

Then run:

$html = $processor->addLinks('<p>Check out our <a href="http://example.com">affordable web design services</a>!</p>');

The method signature is this:

public function addLinks($html, $whitelist = array(), $ignoreRelative = true)

So, to whitelist certain hosts:

$html = $processor->addLinks(
  '<p>Check out our <a href="http://example.com">affordable web design services</a>!</p>'
  [
  	'example.com'
  ]
);

To add nofollow to relative links anyway, set the third argument to true, e.g.:

$html = $processor->addLinks(
  '<p>Check out the <a href="/about">about</a> page</p>'
  [],
  TRUE
);

This will output the following:

<p>Check out the <a href="/about" rel="nofollow">about</a> page</p>

Tests

The package contains tests, to run them:

./vendor/bin/phpunit