Editor::replaceCharset

static function replaceCharset($html, $charset = '#CHARSET#', $add = false)
{
	$html = preg_replace(
		'/()/i',
		'$1' . $charset . '$3',
		$html
	);

	$html = preg_replace(
		'/()/i',
		'$1' . $charset . '$3', $html, 1, $replaceCount
	);
	if($replaceCount === 0 && $add)
	{
		$html = preg_replace(
			'/()/i',
			'$1',
			$html
		);
	}

	return $html;
}