Sri Lanka Vehicle Registration Validation - PHP

lk-vehicle-registration-validation.php

<?php

function is_plate_valid($number)
{
    // normal plate
    if (preg_match("/([A-Z]{2,4}|\d{2,3}|[A-Z]{2} [A-Z]{2})[\-\]|[ ]\d{4}/", $number)) {
        return true;
    }


    return false;
}