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<?php # -*- coding: utf-8 -*-
declare(strict_types=1);
namespace Bueltge\Marksimple\Rule;
class Header extends AbstractRegexRule
{
/**
* Get the regex rule to identify the fromFile for the callback.
* Header h1 - h6.
*
* @return string
*/
public function rule(): string
return '#^(\#{1,6})\s*([^\#]+?)\s*\#*$#m';
}
* {@inheritdoc}
public function render(array $content): string
$headingLevel = \strlen($content[1]);
$header = trim($content[2]);
// Build anker without space, numbers.
$anker = preg_replace('#[^a-z?!]#', '', strtolower($header));
return sprintf('<h%d id="%s">%s</h%d>', $headingLevel, $anker, $header, $headingLevel);
bueltge /
marksimple
