PHP multidimensional array to simple array [duplicate]

Question

Which method is best practice to turn a multidimensional array

Array ( [0] => Array ( [id] => 11 ) [1] => Array ( [id] => 14 ) )

into a simple array? edit: "flattened" array (thanks arxanas for the right word)

Array ( [0] => 11 [1] => 14 )

I saw some examples but is there an easier way besides foreach loops, implode, or big functions? Surely there must a php function that handles this. Or not..?

Answer 1

$array = array();
$newArray = array();

foreach ( $array as $key => $val )
{
    $temp = array_values($val);
    $newArray[] = $temp[0];
}

See it here in action: http://viper-7.com/sWfSbD

---

Here you have it in function form:

function array_flatten ( $array )
{
    $out = array();

    foreach ( $array as $key => $val )
    {
        $temp = array_values($val);
        $out[] = $temp[0];
    }

    return $out;
}

See it here in action: http://viper-7.com/psvYNO