Remove final comma from list

[msky]

PHP newbie. I'm using this code

<li class="amenities"><u>Amenities</u> (may vary by season):
<?php
foreach((get_the_category_excludeCat()) as $cat) {
  if (!($cat->cat_name=='')) echo $cat->cat_name . ', ';
}
?></li>

to print this:

Amenities (may vary by season): fireplace, jacuzzi/hot tub, kitchen/kitchenette, pets allowed, smoke free, waterfront,

How do I stop the final comma from printing?

thanks

[techietim]

Use explode instead.

[msky]

When I said I was a newbie I may have overstated my expertise.

I just don't see how I get from the function

get_the_category_list_excludeCat

to using Explode.

[techietim]

go with this then:

<li class="amenities"><u>Amenities</u> (may vary by season):
<?php
$arr = get_the_category_excludeCat();
$arr_length = count($arr);
for($i = 0; $i < $arr_length; $i++)
{
    if($i > 0)
    {
        echo ', ';
    }
    echo $arr[$i]->cat_name;
}
?></li>

[msky]

Works perfect, thanks for the help