Imploding Array... while IGNORING nested arrays?

Question

I have looked around and I see a lot of people asking how to implode arrays with nested arrays. However, these people usually want to include the nested array as well. I do not want to include the nested array... I want to throw out the nested array...

This is my array:

[tag] => Array
(
    [0] => one
    [1] => two
    [0_attr] => Array
        (
            [category] => three
            [lock] => four
        )

    [2] => five
)

If I implode this array, comma delimited, I want the result to be:

one, two, five

Notice how three and four are NOT included. Since they are a nested array, I don't want it. I only want immediate values. How exactly would I get this done?

are you just looking for an algorithm, or do you want code? If you want code, you'll need to let us know the language. — Matt Ellen
– Matt Ellen, Commented Nov 17, 2010 at 10:58

ajreal · Accepted Answer · 2012-05-03 10:23:58Z

1

You would need to iterate all the values in $tag and filter out those is array
such as

$tags = array();
foreach ($tag as $index=>$value)
{
  if (!is_array($value))
  {
     $tags[$index] = $value;
  }
}
implode(',', $tags);

I found the above is a bit tedious,
here is the improved version

$arr = array(0 => "one", 1 => "two", 2 => array(1,2,3), 3=>4, 4=>new stdClass);
echo implode(",", array_filter($arr, "is_scalar"));

output :

one,two,4

edited May 3, 2012 at 10:23

answered Nov 17, 2010 at 10:51

ajreal

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