如何在php数组中显示值？

I have a this:

$output = print_r($feedDrive, true);

But I just want the actual values, not the commas, or [0] => etc.

How can I do this?

There is foreach loop in php. You have to traverse the array.

foreach($array as $key => $value)
{
  echo $value;
}

If you simply want to add commas between values, consider using implode

$string=implode(",",$array);
echo $string;