gistfile1.txt

$entry[0] = array(
             0 => 'foo',
             1 => false,
             2 => -1,
             3 => null,
             4 => ''
          );
$entry[1] = '';
$entry[2] = array(
             0 => '',
             1 => false,
             2 => '\n',
             3 => null,
             4 => ''
  );
$array = array_filter($entry);
print_r($entry);