validate_uzbek_phone_number.php

<?php

function clear_phone($number)
{
  return preg_replace('/\D/', '',  $number);
}

function validate_phone($number)
{
  return  boolval( preg_match("/^998(90|91|93|94|95|97|98|99|33|88)[0-9]{7}$/", $number ) );
}

function format_phone($number)
{
    return preg_replace( '/^(998)(90|91|93|94|95|97|98|99|33|88)([0-9]{3})([0-9]{2})([0-9]{2})$/', '+$1 ($2) $3-$4-$5', $number);
}

var_dump( validate_phone( '998909999999' ) );
var_dump( format_phone( '998909999999' ) );