Create a comma-separated string from a single column of an array of objects

Question

I\'m using a foreach loop to echo out some values from my database, I need to strip the last comma from the last loop if that makes sense.

My loop is just simple, as

Answer 1

This is what I normally do, add a comma before the item rather than after, while ignoring the first loop.

$i = 0;
$string = '';

foreach($array as $item){
    $string .= ($i++ ? ',' : '').$item;
}