yoosuf

<?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;
    }

yoosuf

<?php

/* 

I grabbed this form WordPress Galleria Plugin, I prefer using this in functions.php rather than a plugin 

*/

remove_shortcode('gallery');
add_shortcode('gallery', 'photo_gallery_shortcode');