possiblelengthfield.php

См. документацию.

<?php
 
namespace Bitrix\Main\PhoneNumber\Tools;
 
use Bitrix\Main\SystemException;
 
class PossibleLengthField extends XmlField
{
    public function decodeValue($value)
    {
        return static::parsePossibleLength($value);
    }

    public static function parsePossibleLength($possibleLength)
    {
        $result = array();
        $tokens = explode(',', $possibleLength);
        foreach ($tokens as $token)
        {
            if(preg_match('/^\d+$/', $token))
            {
                $result[] = (int)$token;
            }
            else if(preg_match('/^\[(\d+)-(\d+)\]$/', $token, $matches))
            {
                $start = $matches[1];
                $end = $matches[2];
                $result = array_merge($result, range($start, $end));
            }
            else
            {
                throw new SystemException("Unrecognized token: ", $token);
            }
        }
        return $result;
    }
 
}