for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <[email protected]>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\Mention\LinkGenerator;
use League\CommonMark\Extension\CommonMark\Node\Inline\Link;
final class CallbackLinkGenerator implements MentionLinkGeneratorInterface
{
/**
* A callback function which returns the URL to use, or null if no link should be generated
* @var callable(string, string, string): ?string
private $callback;
public function __construct(callable $callback)
$this->callback = $callback;
}
public function generateLink(string $symbol, string $handle): ?Link
$label = $symbol . $handle;
$url = \call_user_func_array($this->callback, [$handle, &$label, $symbol]);
if ($url === null) {
return null;
if (! \is_string($url)) {
throw new \RuntimeException('CallbackLinkGenerator callable must return a string or null');
return new Link($url, $label);
thephpleague /
commonmark
