How to avoid adding a comma at the last row?

Question

I use the following code to add a comma , at the end of every filename. After this using explode i put the rows on an array.

The images array if I echo it, it shows a.jpg,b.jpg,c.jpg, (please mind the last comma at the end of c.jpg)

How can I avoid adding a comma to the last found row?

<?php       
 while($image = mysql_fetch_array($images)) { 
 $images_path .= $image['FILE_NAME'].',';
}

$images_array = explode(",", $images_path);
?>

Answer 1

Make use of rtrim() by providing a comma as the second paramter as character mask

$images_path = rtrim($images_path,","); //<---- The added code
$images_array = explode(",", $images_path);

Answer 2

Why add it to a string and then convert it to an array, if you can add it straight away?

$images_array = array();
while($image = mysql_fetch_array($images)) { 
    $images_array[] = $image['FILE_NAME'];
}