Formatter::matchLeadingDigits

static function matchLeadingDigits($phoneNumber, $leadingDigits)
{
	if(is_array($leadingDigits))
	{
		foreach ($leadingDigits as $leadingDigitsSample)
		{
			$re = '/' . $leadingDigitsSample . '/A';
			if(preg_match($re, $phoneNumber, $matches))
			{
				return $matches;
			}
		}
	}
	else
	{
		$re = '/' . $leadingDigits . '/A';
		if(preg_match($re, $phoneNumber, $matches))
		{
			return $matches;
		}
	}
	return false;
}