Compare arrays to find like values

[esiason14]

I have two arrays
$last[] = $row1['player_id'];
$first[] = $all['players_id'];

I want to compare $last and $first. If the value is present in both I want to print "X". If it is only in one...do nothing.

I've tried to figure this out, but I'm not getting anywhere. Any help would be appreciated:

	for ($i = 0; $i < count($all); $i++)
	{
if ($all[$i]['position_id'] == 2) {

     echo "<li>" . $all[$i]['fname'] ." " . $all[$i]['lname'] ."</li>";
      }
      }

Note: I want the "X" to appear before the fname.

Thanks@@

[NogDog]

Not entirely clear to me what you want to do, but I think you could do something like:

if(in_array($value, $last) && in_array($value, $first))
{
  echo 'X';
}