Implode data from a multi-dimensional array

Question

I\'m a novice at PHP and I need a quick solution to the following problem but can\'t seem to come up with one:

I have a multi-dimensional array like so

Answer 1

very simple go for this

$str;
foreach ($arrays as $arr) {
$str .= $arr["tag_name"] . ",";
}
$str = trim($str, ',');//removes the final comma