";
function gerade($wert)
{ if($wert%2 == 0) return $wert; }
echo "Nur gerade Werte: ";
$x = array_filter($feld, "gerade");
foreach($x as $element)
echo "$element ";
echo "
";
function doppelt($wert)
{ return $wert * 2; }
echo "Werte verdoppelt: ";
$y = array_map("doppelt", $feld);
foreach($y as $element)
echo "$element ";
echo "
";
function addieren($summe, $wert)
{ $summe += $wert; return $summe; }
$z = array_reduce($feld, "addieren");
echo "Summe: $z
";
?>