Convert English number to Myanmar number

en2myNum.php

/**
 * Convert English number to Myanmar number
 * @param string $num
 * @return string
 */
function en2myNum($num)
{
    $digits = array(
        '/0/' => '၀',
        '/1/' => '၁',
        '/2/' => '၂',
        '/3/' => '၃',
        '/4/' => '၄',
        '/5/' => '၅',
        '/6/' => '၆',
        '/7/' => '၇',
        '/8/' => '၈',
        '/9/' => '၉',
    );

    return preg_replace(array_keys($digits), array_values($digits), $num);
}